Thank you for adding unsuccessful rounds - that's a really valuable experience.

@RotarySMP

2 жыл бұрын

Glad I could entertain. :)

Dude, I take back everything I said about your pronunciation of "axis".... this was GOLD!! 😂 (and you have a billion times more engineering and electronic knowledge than I... and commitment!) Respect! 👊

@RotarySMP

3 жыл бұрын

Thanks for continuing to watch :)

My heart actually skipped a beat when the threading tool crashed. 😳. So close. Thanks so much for showing the reality of doing something hard. Absolutely one of the best channels on KZread 👍👍😎👍👍

@RotarySMP

3 жыл бұрын

Thanks for the positive feedback on this video. Kind of make up for sucking at machining :)

In difficult times likes these, you might not realise just how much pleasure your videos bring as we watch your creations come to life! And occasionally die.

@RotarySMP

3 жыл бұрын

Thanks for your feedback. Glad you are enjoying the series.

May I say with certainty sir, You have nothing to be embarrassed about. I am 67 years young and have 46 years of machining experience. I have had many many moments like that and much much worse. I am a new member to your channel and I really enjoy your videos. I would give you 2 thumbs if I could. Please continue your excellent work.

@RotarySMP

3 жыл бұрын

Thanks for the kind feedback. Seems my video skills were ahead of my machining skills this week :)

That was...somewhat painful to watch 🤣 Better luck on the next part!

@RotarySMP

3 жыл бұрын

Yeah, I know what you mean :(

I'm so impressed with this build, you've done a beautiful job of it. I think We all go through this expensive trial and error when running a new machine. it brings back memories of when I finished my cnc mill, I had a full scrap bin by the time I had the hang of it haha

@RotarySMP

3 жыл бұрын

Thanks. You re right about that learning curve. I also had a pretty severe carbide consumption when I got the Maho running.

Thanks for the video. You could have put a warning message about the small lathe abuse. It made me jump. Keep safe and stay well.

@RotarySMP

3 жыл бұрын

Like, "no animals or cheap tools where harmed in the production of this video" Thanks. You too.

Ah, the thrills of CNC - when the machine does exactly what you told it to... not what it should have done, had it had a sense of its own!

@RotarySMP

3 жыл бұрын

You would think it would have worked out that it's owner is an idiot who is trying to kill it. :)

@321ooo123

3 жыл бұрын

@@RotarySMP I think the machines operate in Italian strike mode. 😆

Great video! I think you did this on purpose to prove to us regular guys that you might be human! Lol! Good stuff! Thanks for sharing! 👍😎

@RotarySMP

3 жыл бұрын

Thanks for the feedback. I wish it were so :-/

Use a lock nut on the "pin" you made, so that it can rotate in the arm. Like your videos , especially the dual views of machining

@RotarySMP

Жыл бұрын

Thanks for the tip, and kind feedback.

I really very like this channel. This is my favorite series. Is too bad then probably and slovly coming the end. As a machine designer and even earlier as a machine-tool engineer, I appreciate the systematic and well-thought-out process of work from the start series. I own this lathe too, which I bought it for a one year ago and improved a lot. I bought it almost as scrap . But I didn't make it that far, even if I don't intend to convert to CNC. A few things in the beginning series also inspired me. Thank you and I'm taking off my hat. 👍🎩

@vincentguttmann2231

3 жыл бұрын

Nah, there is much to do. I think Nico is holding back with dumping scrap in front of his garage so he finishes the lathe faster and can then fix Nico's stuff.

@RotarySMP

3 жыл бұрын

Thanks for the kind feedback. I long ago acheived this series goals (learn to scrape, do some YT videos). Shame I didn't start with a Schaublin 125CNC :)

Well that was exciting and take comfort in knowing that even Frakenstien's moster servered a purpose. I'm only joking, great to see the progress and thanks for taking the time to share your adventure.

@RotarySMP

3 жыл бұрын

Thanks for watching.

I've enjoyed watching your videos as much for demonstrating the facts of life regarding making stuff and your patient non 'entitled' manner as for the detail around what it takes to build your own CNC conversion. Thanks to you for depicting the patience and perserverance required (an noted) in the ever-expanding 'list' of what had to be done - just to get to the beginnings of an operational state has been a real achievement - congratulations and thank you. I am still waiting for my spindle to come back from Schaublin - the good news is that they conformed in their inimitable fashion - that the spindle was 'perfect' but that the pneumatics were indeed 'unacceptable' -it has been fixed. Also, thanks for the links and mention of the Linux CNC forum. Pete

@RotarySMP

3 жыл бұрын

Thanks a lot. Where have you posted your thread on your Schublin? I would really like a 125CNC with good mechanicals and a dead controller.

@petera1033

3 жыл бұрын

@@RotarySMP I have started an instagram account where I am starting to post some stuff - nothing really to talk about yet as I am still waiting for spindle to come back. FYI - this is my first CNC machine - so quite a learning curve for me coming from manual...@Peteyga Schaublin have a great name - but it comes at a cost (to the user) a set of B32 collets for example is a significant investment in itself - ( I haven't been able to find a B32 non Schaublin maker as an example) I guess if you have the experience and know how to rebuild a control system for yourself - at least the entry cost of the machine can be minimised and there would be heaps of 125CNC for you to look at within a long days drive I would imagine ( I am jealous of all people who live in Germany/Switzerland form that perspective) ...I think all Schaublin CNC machines come with Fanuc controllers and Schaublin has their own spin on how to set up the parameters of the control ...it is a non trivial matter choosing a CAD/CAM system to match - you have an indexable spindle as well as another axis that can be driven in Z and X if you add a grinder or an accessry spindle on a milling attachment - I dont have a grinding attachment but I do have a 30,000rpm Schaublin Spindle and the required milling attachment ( effectively a vertical cross slide ). I dont have a turret system but withe 225 it is limited to only 8 tools anyway - I think I will set up a gang tool system on both sides of the spindle for the stuff I will probably use regularly... Not sure how much interest there would be in youtube videos about a Schaublin 225 - I am surprised at how little information there is anywhere about Schaublin lathes in general tbh - let alone the proper function of all the accessories available - spindles/Collet systems /Chucks etc... Leaving repeat manufacture aside - the only real benefit I am chasing with my machine is 'easy' accuracy ( even in manual mode) and interpolated movements - easy complex tapers etc...otherwise a nice solid manual machine is far less of a pain in the bum - which is why I dont think I will be selling my 1970's Okuma anytime soon.

No need to apologise! I watch to learn, to live vicariously through others and... well, for entertainment. And while I am not entertained by other people’s misfortune, the way you deal with it is inspiring to see.

@RotarySMP

3 жыл бұрын

Thanks for the encouragement. Steep learning curve.

When threading manually on my minilathe I have to take vey light cuts (only a few thou). So I was delighted to see that even after all your scraping and re-gibbing etc, you still need to take light cuts to avoid catastrophe. Full marks for honest disclosure.

@RotarySMP

3 жыл бұрын

I was in high gear, whereas low would have given about 2.5x torque, and also my work holding was poor, with insufficient depth in the collet. I am pretty sure I can take a deeper cut, but improving the geometry doesn't address the bed having the rigidity of a wet noodle. Still better a mini lathe than no lathe.

This is just awesome! The approach and finess is truly spectacular.

@RotarySMP

3 жыл бұрын

Thanks for watching, and for your feedback.

Awesome job it’s coming up good. I really enjoy watching your work.

@RotarySMP

3 жыл бұрын

Thanks for watching.

This is the deficiently of a ER collet. If the work piece is to short the collet won’t grip it properly. If you had left the bar long and turned the threaded end first. Than cut the part off the bar. Than you could chuck the longer section in a smaller ER collet to do the end with the cross/clamp hole. If chucking something in a ER collet that’s shorter than the collets clamping length they don’t hold properly. The back of the collet collapses to small and than there is a taper to its bore. This results in the part only being clamped on the very end corner of the bar. That’s why the part moved when you were threading it. You can reduce this to some extent by clamping something of the same diameter in the very back end of the collet when you tighten it. But it’s still not the best. Sorry for being so critical you machine looks great!

@RotarySMP

3 жыл бұрын

Hi and welcome. I really dig your channel! I learnt the hard way about clamping short in the ER collet. I think it was about the time I was making all these screw ups that you made the video of the part with the thousands of measured dimensions. I can't even fathom how that can work. My probablity of screw ups doubles with every feature set up, so i'm at near certain error by about the fifth.

Watching your build take it's first steps must be thrilling.

@RotarySMP

3 жыл бұрын

I could have done with fewer thrills :)

That's a great project. Thanks for the series.

@RotarySMP

3 жыл бұрын

Thanks for watching.

I've got one of those toy scopes too! Surprisingly "good enough" for many tasks, and much better (for many tasks) than a multi-meter

@RotarySMP

3 жыл бұрын

I agree. Pretty low frequency, but most of what I do is also low frequency.

I enjoy watching just to see how you are making out with this project I don’t care if fail I just want you to succeed

@RotarySMP

3 жыл бұрын

Thanks for the encouragement.

Brave soul turning so close to the collet at this stage. Having rebuilt my big Beaver TC20 I know the stomach gripping tension of running that first program. At least yours should stall on a big crash, mines a 26 kw spindle motor !

@RotarySMP

3 жыл бұрын

Scary. That really is a nice feature of the mini lathe, the axis stall, the belt should slip, and it the worst happens, I can replace anything.

I really jumped at that last crash 😁 Keep on trying! And thanks for the video.

@RotarySMP

3 жыл бұрын

Will do. Thanks for watching.

Failures like that are all important input for anyone contemplating CNCing a lathe like this - you need to have good estimates of both effort and results involved :)

@RotarySMP

2 жыл бұрын

Yep. My goals for this project were 1/ learning to scrape, and 2/ starting a YT channel, so as such it was a success, but a polished turd is still a turd.

It's progress. Keep up the good work!

@RotarySMP

3 жыл бұрын

Thanks. Will do.

I think this was a great episode. Just one inevitable step in making a homemade machine tool. Don't be discouraged :)

@RotarySMP

3 жыл бұрын

Thanks. It was a pretty disappointing day, but now I am getting ready for the rematch.

I think you need to make sure you use your Maho every video, that thing is just gorgeous 😍

@RotarySMP

3 жыл бұрын

It is a really nice machine. I am getting progressively comfortable with using it, also this time I messed up the touch off completely.

@oliverrowe8648

3 жыл бұрын

@@RotarySMP I'm very jealous, it's quite hard to find a Maho in Australia...

@RotarySMP

3 жыл бұрын

@@oliverrowe8648 I got lucky, this one came up in Passau, about 3 hours from here. The controller was defective, so it was pretty cheap, although the mechanicals are barely worn. There are plenty of other good candiates like Hurco, Fadal etc.

Love your effort, keep it up!

@RotarySMP

3 жыл бұрын

thank for watching.

The good thing: if it crashes it can’t destroy itself :D Round the whole thing up and fit a 1,5 kW motor in there :)

@RotarySMP

3 жыл бұрын

And twist it up into a pretzeel.

I was watching an older video by Stefan about regrinding his carbide inserts as that helped on his hobby grade machines as less cutting pressure is needed , only a suggestion as I’m no machinist , I enjoyed the video thanks.

@RotarySMP

3 жыл бұрын

It would help with cutting pressure, but then I loose the CNC advantage of having fixed tool offsets. With standard inserts, once you change tips, for general tolerance (no tolerance) jogs like this you don't need to touch off again and change offsets. Thanks for watching.

@lesliesoutham7396

3 жыл бұрын

Thanks for the reply 👍, I’d never had considered that as I don’t have cnc experience.

@RotarySMP

3 жыл бұрын

@@lesliesoutham7396 Judging by STGW's excellent workmanship, he probably grinds all his inserts to identical repeatable dimensions as well :)

@lesliesoutham7396

3 жыл бұрын

@@RotarySMP maybe your next project could be a CNC cutter grinder machine like edge precisions , 🤣

@RotarySMP

3 жыл бұрын

@@lesliesoutham7396 Imagine crashing something like that!!! Scary.

As long as it works you can call it a success! :-)

@RotarySMP

3 жыл бұрын

Thanks. I'll take that.

Man. That sound at 18:31 made me jump out of my chair.

@RotarySMP

Жыл бұрын

This is how I make sure viewers are alert :)

Oh I like it! Best regards Nico from Nico's Projects

@RotarySMP

3 жыл бұрын

Hi Nico. Welcome.

Very good video..thanks for your time

@RotarySMP

3 жыл бұрын

THanks for watching.

Always enjoy seeing projects succeed Having done extensive one off CNC milling and punch press I always found the lathe much more difficult

@RotarySMP

3 жыл бұрын

I really like lathes, although you might doubt that from my sadism in this video.

BTW, I might need a list of tail numbers of any aircraft you worked on.... ;)

@RotarySMP

3 жыл бұрын

Ouch! :)

Shitty parts have feelings too! It'll probably give years of service and annoy the hell out of you every time you open that door on the boley!

@RotarySMP

3 жыл бұрын

It is only temporary :) Nothing is more permanent than a temporary soluion.

I once heard someone say fail small fail cheap. At least it wasn't a $3000 USD part and you didn't seem to hurt the machine . It's great to see the cnc lathe doing something now. in a year from now that machine will probably be able make that same part repeatedly perfect once you know what speeds and feeds it can handle.

@RotarySMP

3 жыл бұрын

You really get to see why machines need mass. Those cuts the Boley does with ease. Although half my problem was not enough stock in the chuck.

@clasdauskas

2 жыл бұрын

I think the full quote is something like 'fail small, fail fast, fail cheap' - you make lots of little, cheap mistakes, quickly, hence you learn quickly and avoid massive expensive fails ...

You are braver than I, to upload making that "part". ;) Looks like you could use a HP increase. Too much is never enough! A different order of operations would have helped the workholding a lot, too. It is nice to see some first chips after all that work. I have been on the fence about a Linux CNC conversion, but the more I see the more it looks interesting.

@RotarySMP

3 жыл бұрын

YOu arent wrong. The only silver lining of my lame machining, is that people low watching robots commit suicide. :) Yep, on the rematch, I have to do the work holding differently.

We all have our bad days. I can't count how many times I've made very complex and expensive scrap lol. You just gotta spend the time to learn your machine i think...

@RotarySMP

2 жыл бұрын

You are right there. I also got some good feedback from Peter (edge precision) which really helped reduce the error rate.

I was waiting for a new video!

@kwk8363

3 жыл бұрын

Me too:)

@RotarySMP

3 жыл бұрын

@@kwk8363 Sorry to be late guys. It took me longer than expected to get the footage shot, and then the first render failed.

Awesome a video release right when i hit the couch to relax I use that rubber in All My lista cabinets drawers. You can never have to much rubber on your flat surfaces 🤣👍👍 The fact that you keep that calm when stuff is not working is awesome LOL. If i am abit stressed out from stuff that dont work for me i would not get Any video recorded at All haha

@RotarySMP

3 жыл бұрын

RIbbed for maximum pleasure :)

@clasdauskas

2 жыл бұрын

Video editing can make things seem very calm. I sense from the tone of voice when he said it was time to stop messing around that quite a lot of audio was cut :)

Well it's a great start. Now i want to convert my own lathe to cnc.

@RotarySMP

3 жыл бұрын

If you can find a CNC lathe which just needs an upgrade, like an Emco, yuo are miles ahead rather than retrofitting a manual machine.

This little cnc lathe looks lots like the training machines they had in tech schools in the late 80s.

@RotarySMP

3 жыл бұрын

Wags say it looks like Chernobyl control room :). Thanks for watching.

Thank you for showing your mistakes. It make the rest of us feel better when we make machining mistakes of our own.

@RotarySMP

3 жыл бұрын

I watch guys like Stefan Gottewinter and easpecially Edge Precision, and wonder how they do it. That 7 (?) axis Mazak of edge precision would be trashed in a day if I tried to use it.

@andypughtube

3 жыл бұрын

@@RotarySMP Watch this NYCCNC and feel a little better. kzread.info/dash/bejne/iGyos9WRo93gnZs.html

Great video.

@RotarySMP

3 жыл бұрын

Thanks.

On the ER clamping problem: As you've found you can't grab onto a short piece of stock. You can cheat the system however by putting another piece of stock the same diameter in the collet behind the piece you're working thus increasing the collet engagement, and making it clamp evenly on the work piece. I regulary use the shanks of drill bits to do this (with the sharp end protruding backwards into the spindle bore).

@RotarySMP

3 жыл бұрын

That is a really helpful tip, thanks.

Hi, I am not very good with horror films, I jump out of my skin all the time - lol... although this was a bad day in the workshop for you, after watching the previous 38 episodes I do feel confident that you will resolve everything... Take care Paul,,

@RotarySMP

3 жыл бұрын

Yeah, it was a bit of a freak show this week. I guess I need a bit of time to reset what these tiny machines are capable of. The Boley can take those cuts with ease.

As a machinist for the last 51 years I can say with all confidence that your biggest problem is workholding. Your ER collet just isn't doing the job. You are not tightening it enough, or it isn't gripping enough length. Personally, I have never liked ER's and only use them when there isn't another option. My two cents.... And I applaud you for stepping up and trying to do something. Continue the good work!!

@RotarySMP

3 жыл бұрын

Thanks for that feedback. I suspect you are right on both counts, so I'll try something different for the rematch.

I bought some insert from Banggood purple-ish blue game changer and I run my lathe backwards with the tooling upside down. That way the tool is push up and way from the work not pulled into the work. I’m working on removing compound slide. Thanks for sharing.

@RotarySMP

3 жыл бұрын

That TCMT tool holder was part of a crappy set when I got it 20 years ago, and has not improved with age. Time to retire it. I have better (but bigger TCMT holders for the Boley. I'll check out those inserts.

HAD MY OLD LADY LAUGHING BROTHER..THE LAPTOP OVER THE HEAD WAS THE ONE..

@RotarySMP

3 жыл бұрын

Yeah, not my best moment that one. Thanks for watching.

Clean up the brake shoe and it will stop better... That is a good design. A good design trumps poor machining. I like how the cnc part cut the round area. She's got the potential to "sit up and beg".

@RotarySMP

3 жыл бұрын

True, there is a lot of oil in there. I am confident that on the rematch , the lathe has no chance. :)

I think you should put a black "anonymous bar" over any shot that shows the faceplate engraving. It sets my OCD off something fierce....

@RotarySMP

3 жыл бұрын

Especially hurts to find the engraving is not just ugly but wrong. You dont have a "C" continuous jog mode with an MPG. Duh!

This is a really excellent series. Are those triangular inserts moulded or ground? The bloke on the smallcnclathes channel talks about using finishing inserts for roughing, citing lower cutting forces due to the highly positive rake and sharper edges. I've used cheap inserts intended for aluminium on steel with good results. This is on a basically unmodified Sieg.

@RotarySMP

3 жыл бұрын

Those are moulded inserts. I also have the high rake angle polished ones for aluminium, but fine the edges don't last in steel. This piece of mystery steel is pretty touch as well.

Can I ask what you are using for cam? The m8ni lathe rebuild is coming along but I'm picking up the emco next week so need to look at cam

@RotarySMP

3 жыл бұрын

This is an ancient version of FeatureCAM. 17 years old. If you go to the download section of CNCZone, there is EZILATHE... www.cnczone.com/forums/uncategorised-cam-discussion/263938-cnc-cam-forum.html

There were some cool parts to the CNC'ing - the rounding of the head - that final pass from the centre out. Actually the CNC performed well, it was the manual bits that went awry, like holding the piece (not tightened enough?), drilling the threaded hole - that was just setup completely wrong - begging for a broken bit - the flat appeared later, yet the hole was still too close to the edge. Nice job with the CNC lathe. I guess the next part is where you add another three axis :)

@RotarySMP

3 жыл бұрын

A lot of errors: - I should have switched to the four jaw. I suspect that thread on the ER32 collet chuck is so bad it loosend. - Should have used lo gear. - Should have picked up the M4 which the Fanux6 Post processor put in (I replaced it most times). - some leaded steel would be nice.

@BenMitro

3 жыл бұрын

@@RotarySMP Man, you know your stuff. Well over my pay grade! Very impressive to watch you Mr. RotarySMP. (Really).

@RotarySMP

3 жыл бұрын

@@BenMitro That is one of the reasons I got into this stuff, to learn. It has been a steep, but fun learning curve.

You know the tightening torque on an ER collet nut is way more than you might think. Something like 120-140lbft if memory serves, but that is by no means reliable. The Swiss site for the original ER collets will give you the figure.

@RotarySMP

3 жыл бұрын

I doubt the ugly thread on my collet chuck would get anything near that. The is probably part of the problem though. And the stock was no inserted far enoug into the collet.

"I don’t really care how people pronounce my name, but Linux is always Lih-nix." -Linus Torvalds (creator of Linux)

@vincentguttmann2231

3 жыл бұрын

Any customer can have a car painted any color that he wants so long as it is black. -Henry Ford (Founder of the Ford Motor Company)

@Th3_ENGINE3R

3 жыл бұрын

@@vincentguttmann2231 As long as they pronounce it Black.

@vincentguttmann2231

3 жыл бұрын

@@Th3_ENGINE3R Right. Also, it's pronounced "GIF", not "GIF".

@RotarySMP

3 жыл бұрын

@@vincentguttmann2231 Since I started doing videos, I realised how often I butcher language.

@vincentguttmann2231

3 жыл бұрын

@@RotarySMP As I often do this accidentally, that's music to my eyes. And the pronunciation of "GIF" was actually a Ton Scott reference.

For the depth of cut issue - do you think it might help to have something on the spindle that would act as a well-balanced flywheel to give it a little more inertia? I can't recall of there would be room inside your head stock - I'm comparing it to my old cast iron table saw - once that thing gets up to speed it takes a lot to slow it down and mostly it is due to the very heavy armature on the motor - it takes five or so seconds to spin up.

@RotarySMP

3 жыл бұрын

Using a chuck, especially the four jaw, would provide more inertia. I also should have selected low gear which proides about 2.5x the torque.

Well, thats life :) Good job either way! Curious though, what your guess would be for the different failures?

@RotarySMP

3 жыл бұрын

Round 1 - Not realising that the depth of cut in the CAM is radius not diameter. Round 3 - Not checking the end of stock Z position, after reinstalling the stock. Round 4 - The CAM PP was for a fanus 6M, which is pretty close to Iso-274, so it works well for LinuxCNC, but it must be a rear tool post machine, so it sets an M4 (CCW where I need an M3. I missed it that time. Round 5 - Stock not deep enough in collet, vs too much stickout, and maybe too much depth of cut.

I think your problem is you might not have enough stock inside your er collet, make sure it reaches all the way to the end. also try to use close to the maximum diameter of the collet if you can. 18:42 yeah way way too short, the collet is being allowed to flex out of its tapers and loose grip, no biggie just use a longer piece for it to grip. in this case do the thread side first, and then turn it around in the collet and grab it by the shank you made, then part off the excess material, and finish the round surface off.

@RotarySMP

3 жыл бұрын

You are right. I should have been more careful with the work holding. I also could have done the threaded bit in two setups. First chucked up short, with just 20mm for the thread (plus a little) sticking out, and then once that was down, pull it out more and cut the shank.

9:23 power by Aldi!

@RotarySMP

3 жыл бұрын

Good spotting. Runs the toy Osci.

That is my experience with CNC too ;-)

@RotarySMP

3 жыл бұрын

Faster production of higher quality scrap :)

@JamesChurchill3

3 жыл бұрын

@@RotarySMP And more repeatable too.

@RotarySMP

3 жыл бұрын

@@JamesChurchill3 Yep, in my case, never every time a crash.

Nice, I'm in the middle of a conversion myself also with a MESA 7i96. Would you share the HAL and INI file ?

@RotarySMP

3 жыл бұрын

Cool. I have posted them to the first post of my build thread here: forum.linuxcnc.org/26-turning/38280-pimping-the-mini-lathe?

In the PncConf you can easily set up the HandWheel (2.7.15) - multihandweel if you using 7i76E in 2nd mode. But for 7i96 it can be the one solution that you show. But looks great! Try to read about G-codes in LinuxCNC and postprocessors for your CAM. What are you using G94, or G95? (mm/min, or mm/rev) I've used Resistor break with my Danfoss inverter

@RotarySMP

3 жыл бұрын

I didn't think to even try PNCConf again. I normally just use it for the initial set up and then manually edit the HAL/INI from there. I am a slow learner, so it is great that the guys on the LinuxCNC forum are so patient.

@DPTech_workroom

3 жыл бұрын

@@RotarySMP I'm slow learner too. (in this year i began to read about LCNC) I'm using the PncConf to see the changes and just copy/paste to the needed place. (in new config) On my instagram you can see some machines that I helped to convert to CNC with linear tool change and one mill.

@RotarySMP

3 жыл бұрын

@@DPTech_workroom This was the first time I have used G95, that is pretty sweet on a lathe. I did one try at CSS, but that was the path whic hran backwards, as I didn't catch the M4. It should be easy enough to edit the PP to fix that.

What software are you using to make those wiring diagrams?

@RotarySMP

2 жыл бұрын

I have Visio on my work laptop, so used that. Pretty time consuming job.

What - that's a mighty fancy ... vice. Are you going with smooth jaws (or even soft jaws) for precision parts, or are you going to make serrated jaws? Serrated jaws ought to be a cinch on a CNC mill!

@RotarySMP

3 жыл бұрын

Probably smooth jaws. I never really like serrated jaws. It is easy enough to add soft jaws over the top.

Feeds and speeds are so hard from piece to piece, almost seems like you’d have to make a guess every time, with maybe the exception of known materials... it was a good time for us anyhow.

@RotarySMP

3 жыл бұрын

Yeah, I agree. The recommended FS data from the insert manufacturers is for machines whose wiring diagram weighs more than the mini lathe, and is probably more rigid. That mystery steel has a far bit of carbon in it, judging from the sparks.

You seem to like speeds that require a lubricated cut.... and on my mini lathe.. I've switched to carbide insert only, as these can be resharpened...(on.. the mini lathe is crap and need a rebuild.. the reason that I found you channel.. well YT did the initial suggestion).

@RotarySMP

2 ай бұрын

Thanks for watching it. :)

I think that the brake shoe needs to slide down on its adjustment so it swings through less of an arc before engaging. FWIW I always consider threading without a tailstock to be a bit brave.

@RotarySMP

3 жыл бұрын

I adjusted it dow, and although it has two M10 hex hed screws mounting it, it slips back up when I step on the pedal. I really had too much stick out, with insufficient length in the collet.

Looks like you had one of those bad luck days. Wrong alignment of the moon with uranus or something like that. Still smiling at you cutting a thread with just the little bolt head held in the collet... what could possibly go wrong...

@RotarySMP

2 жыл бұрын

Yeh really. Not ne of my better decisions.

Rotating the wrong direction happens to the best of us. But that is a bit to frequent!

@RotarySMP

3 жыл бұрын

I used a Fanuc 6M Post, which must be a rear tool post lathe, so it assigns the reverses spindle rotation commands. I caught and corrected it nearly ever time, but one snuck through.

I think you got your step multiplier switch set up backwards on the jog wheel? Seems weird to have x100 as the slowest setting.

@RotarySMP

3 жыл бұрын

Is that how they are on real CNC machiens? I have used one. I thought X10 is tenths of mm, and X100 is hundredths.

@petergamache5368

3 жыл бұрын

@@RotarySMP Multiply vs divide ... Take a step back, grab a cuppa and ponder for a bit. :)

@RotarySMP

3 жыл бұрын

@@petergamache5368 :) So on a real CNC x100 means each step is 100/100th = 1mm? I just though they used an X as a decimal point doesnt engrave well :) Duh!

@frederickfriebe1243

3 жыл бұрын

@@RotarySMP The Deckel guys from germany had it your way on their handwheels, 10 was one tenth of a mm, 100 one hundreth, and 1000 one thousand of a mm

@RotarySMP

3 жыл бұрын

@@frederickfriebe1243 Oh good. I am not alone in this then.

What is that CAM software you are using for simulation?!

@RotarySMP

3 жыл бұрын

An ancient version of FeatureCam.

What CAM software were you using? Not one I have seen before (but I'm far from an expert).

@RotarySMP

3 жыл бұрын

This is an ancient (like over 20 year old) version of featureCam.

@VorpalGun

3 жыл бұрын

@@RotarySMP Oh, another autodesk product it seems. I hope they improve the Path module of FreeCAD so it is possible to do the whole chain from cad to cam to cnc on Linux soon. If I recall correctly there are still some parts missing to be able to do cam for lathes.

@RotarySMP

3 жыл бұрын

@@VorpalGun Mine is soo old it was still a Delcam product. I had never used the Lathe module before. The good thing is is has a bunch of post processors, and pretty simple editor to modify them I used the Fanuc6M, but need to switch to front monted tools as it uses M4 for fwd, but I need M3.

At 21:15: Is it really right, how the brake touches on the shaft? Looks like there should be much more contact surface possible, when loosening the bolts and lift the brake pad down. Just being curious...

@RotarySMP

3 жыл бұрын

You are right. I readjusted that, and it is also slipping a bit.

@heathledger4506

3 жыл бұрын

@@RotarySMP Maybe you need a new brake pad

@RotarySMP

3 жыл бұрын

@@heathledger4506 There is plenty of meat on the pad. It is all pretty oily in there, so I don't expect much from the brake, but the shoe carrier is mounted with 2x M10 screws and they are also slipping when I stomp on the brake. I thought I cranked them.

btw Your conventional lathe brake would benefit from a new braking shoe...

@RotarySMP

3 жыл бұрын

There seems to be plenty of meat on it, but it is pretty oily.

I was expecting a drill bit to break on that breakthrough like hole on the brake part you made

@RotarySMP

3 жыл бұрын

I got lucky on that one.

OK, OK, I like to work close to the chuck but I actually jumped and blinked at 16.50 when it went so close to the collet. And the again at 18.28 when it jumped cutting the thread.

@RotarySMP

3 жыл бұрын

You have to trust the machines ablity to count :) It was at least 0.1mm clearance, and a miss is as good as a mile.

@smallcnclathes

3 жыл бұрын

@@RotarySMP I was looking at the rh screen and I think it made it look even worse than it was. Still darn Tight though.

@RotarySMP

3 жыл бұрын

@@smallcnclathes One of many pucker moments in the world of CNC :)

What actually happened with the threading mishap? Collet couldn't handle the load from the part stickout once the threading tool started getting deeper into the thread?

@RotarySMP

3 жыл бұрын

I covered what whent wrong in the rematch... kzread.info/dash/bejne/m4V-ubR7nrW4krQ.html

Get a diamond wheel and some brazed carbide, then you can regrind the tool after each fckup. Since that lathe is not capable of doing real damage to tools, brazed carbide should last a while until everything is ground to dust.

@RotarySMP

3 жыл бұрын

I have a diamond wheel or two for the Clarkson, and a few brazed carbide tools, but the problem with any ground tooling is that you need to redo your offsets on every regrind, whereas the indexable tools keep them constant (with tolerances which this machine cant hold.

Nice one ;-) btw, your break shoe seems to have contact with the spindle only at the front edge?

@RotarySMP

3 жыл бұрын

I corrected that today, but that mount slips too.

@Andrew_Fernie

3 жыл бұрын

@@RotarySMP Another opportunity to cnc a part perhaps?

@RotarySMP

3 жыл бұрын

@@Andrew_Fernie I need to take a closer look at it, but it is pretty far down on the priority list.

@mazchen

3 жыл бұрын

@@RotarySMP Until it breaks :-) :-) And just now I notice I typed "break" shoe....

@RotarySMP

3 жыл бұрын

@@mazchen The brake is not a big deal, I just wait a couple of seconds for it to spin down. In prodution it would drive you nuts though.

Fascinating high load burnishing technique! Worth pursuing?

@RotarySMP

3 жыл бұрын

:) Not if I can help it.

@russelldold4827

3 жыл бұрын

@@RotarySMP how do I give 10 likes for your answer? 😆

@RotarySMP

3 жыл бұрын

@@russelldold4827 Watching 10 more videos?

@russelldold4827

3 жыл бұрын

@@RotarySMP I think I'm pretty close to 1 for 1. I like your style!

Es sieht auch so aus, als wäre ein neuer Bremsbelag mal nicht schlecht ;-)

@RotarySMP

3 жыл бұрын

Na, ja...da ich eine neue Speilzeug zugelegt habe, kann es den Neuen Besitzter tauschen.

Why is suddenly everyone doing something with collet chucks? Quinn from Bloondihacks made one in her video yesterday, and someone else she mentioned as well. Also, that steel grade scrapbinium seemed to be a tough nut. Why don't you make a linkage for the brake like you did on the gear change lever?

@RotarySMP

3 жыл бұрын

You are right. From the sparks, there was a fair bit of carbon in that steel. I made that collet chuck at least 15 years ago. I just used it cause it seemed like a good idea. It wasn't :)

For the thread on the CNC machine, we use at work ca. 8-10 passes for the thread itself and maximum one clearance pass (just sometimes on some nasty stainless). But I work on industrial CNC maschines made by Mazak and we use carbide cuttings tools. So I don't know how capeble is your tiny CNC machine with your HSS steel when working properly ;-)

@RotarySMP

3 жыл бұрын

Thanks for that. I need to do some more practice - understatment that :)

Out of curiosity what cad/cam is that?

@RotarySMP

3 жыл бұрын

An ancient (over 20 years old) version of FeatureCam.

Why don't you make a collar to go over the pull down rod to stop your new pin from slipping

@RotarySMP

3 жыл бұрын

I dont think it is slipping. I had another play with it today, and I think it is the brake shoe mount which is slipping.

What’s with the Nicko stuff?

@RotarySMP

3 жыл бұрын

He is a workmate of mine. Has been the most enthusiastic fan of this channel since the first day.

I'd rather have an ugly part that works than a pretty part that doesn't. I was cringing watching those threading passes rip, i half figured you'd tested it before cranking it up to 11.

@RotarySMP

3 жыл бұрын

I'd done dry runs cutting air, but that was the first actually threading cut in steel. Too muc stick out, wrong gear ratio, too much depth of cut, not enough stock length in collet, chuck nut not tight enough. Plenty to improve upon.

WNMG has 6 corners per insert :-)

@RotarySMP

3 жыл бұрын

I need about 20 per :)

@MF175mp

3 жыл бұрын

Usually 2 corners go at a time when you crash. The other might be already used if you're lucky.

@TheMetalButcher

3 жыл бұрын

Negative rake on this machine? Hard pass! It needs all the help it can get.

@MF175mp

3 жыл бұрын

@@TheMetalButcher probably if there's a serious lack of horsepower you could use aluminum inserts on softer steels

@TheMetalButcher

3 жыл бұрын

@@MF175mp That would probably work good.

I don't think your ER collet nuts are getting torqued tight enough. They're specced to like 150Nm or something.

@RotarySMP

3 жыл бұрын

Surely part of the problem. I doubt that horrible thread I cut into that collet chuck would survive that torque. I should have held the stock more deeply in the chuck as well.

Its a good idea...next time just leave some more material on the (head) of the clamp/ bolt mechanism thingy....lol

@RotarySMP

3 жыл бұрын

Yep. I guess we will need a "Man vs tiny CNC lathe rematch" :)

18:29 I felt that.... So sorry

@RotarySMP

3 жыл бұрын

I was a little disappointed as well :(

When you try your best but you don't succeed .. :D

@RotarySMP

3 жыл бұрын

Yep, that is about it.

I cringed and was slapping for an e stop every mess up! How do you determine where the insert tip is between tool changes? Do you have a tool setter behind the scenes? I have an oooollllldddd cnc lathe I wanna get going. Love the content btw

@RotarySMP

3 жыл бұрын

I set the tool offsets in advance with light cuts (at least with insert tooling, you can replace tips without having to refind the offsets.

Almost TOT level of subliminal suggestion.

@RotarySMP

3 жыл бұрын

Thanks.... I think :)

@vincentguttmann2231

3 жыл бұрын

But not quite. I think nothing beats the "Keep calm and wear a subscribe" mug in one of the recent videos, or the subscribulator in the trige... shop math video. If he had a "subscribe" on his control panel instead of the youtube logo, it'd be on par with ToT.

@RotarySMP

3 жыл бұрын

Tony is a brilliant story teller. There is a good reason he has a million subs. I'd be thrilled to produce 1% of his quality.

@vincentguttmann2231

3 жыл бұрын

@@RotarySMP well, that is obvious: Scotchbrite pads! Make for better finishes, and great props when speechifying. You already got a MAHO and a mini lathe. The video, and also the audio (this can be a real annoyance when that is done wrong) quality is excellent, though there are less dad jokes. And one of the important things is also already common practice: a noticeable, consistent style of the thumbnails. Although he tells stories, and you do more of a vlog-style video. Also, you go into greater detail, and make more videos, which I appreciate. To put it another way: Yes, I am looking forward to a new ToT video, but I am more excited about yours, since I know when that will come. Really, I think all it takes are a few collaborations (Blondihacks, Dragonfly Engineering and other small ones?), and then the sub count should also be rising. The one things that certainly not holding you back is video quality.

@RotarySMP

3 жыл бұрын

@@vincentguttmann2231 Thanks for the positive feedback. It helps a lot, especially after working all week on the project with this specific negative result. Although as crap as my lathe work was, the video is doing pretty well. :) Wonder how many scotch brite pads it would take to polish that brake bolt turd ? :)

would u replace the friction material on the pad please u are trigering my ocd there is metal on metal going on in there ohh the poor shaft

@RotarySMP

3 жыл бұрын

Sorry, that video was made a couple of months ago. What are you refering to?

@dimitartenchev9338

3 жыл бұрын

@@RotarySMP my bad i was having a glas of fine wine while watching ur shenanigans didnt see the timestamp of the video and made a comment about the brake system on the lathe

@RotarySMP

3 жыл бұрын

@@dimitartenchev9338 Oh right, I remember now. There is some sort of brake pad material (given the age, maybe Asbestos?)

@dimitartenchev9338

3 жыл бұрын

@@RotarySMP its laced ferodo the same material dound in clutches on cars and trucks just lacen in a fabrick sheet if u can call it that