when your Hacksaw is starting to talk to you........ It's time for a break... LOL

@pmsilvei

2 жыл бұрын

🤣🤣🤣

@PiefacePete46

2 жыл бұрын

Or time to break the hacksaw?

21:15 Haha Maybe you have too Much alone time ; ) ( yes i can hear it ) Thanks for the Video : )

The problem with KZread comments is that you can only read them after you have done the work, edited the video and published it...we need real time comments. Can you imagine that 66k people talking to you at once? Hell on Earth. I can relate to all you are experiencing, aluminium shavings, holes slightly off, bolts too proud, build time exceeding all expectations etc. etc. and mine is a totally different project. While watching your video, I worked out how to get around my latest "issue", so hence my reason for taking the time to watch your video. Cheers and thanks for another great video.

Tip, grubscrews in pulleys ALWAYS need a flat on the shaft. Because one day, you may want to remove it...You can also cut circular grooves if you want to adjust its angular position...🤔🤔😳🇬🇧

@iforce2d

2 жыл бұрын

Yeah I might try making my own flats. The motor shafts all have a flat (or keyway) but none of the ball screws do. Maybe that's not part of the cheapo AliExpress service :)

@EnglishTurbines

2 жыл бұрын

@@iforce2d Just file your flat on by hand ..It's rediculous not to TBH. Loctite the screw...I used to design Laser Cutters, now retired...lol.

I was feeling your pain all the way through, seems I have your luck on most home projects I do too.

I salute your perseverance, well done sir!

In the future if you file at least one flat in the shaft for the motor it'll be a lot less likely for the pulley to slip on it

For reassembling the bearings, try adding a tiny bit of grease on the ball to make them stick in a little.

51:50 Absolute perfection. Well done. This part of the video really made watching the entire thing worth it. Thank you for taking us along on this build. Cheers.

13:00 If you have enough clearance, put washers under the capscrews... it'll hide the slotted holes, and the judges will give you a perfect 10/10! ;o)

Drop the Aluminium bearing blocks in a pan of boiling water. The bearings should just drop out. Same trick putting bearing in. NEVER use a hammer on any bearing. The two back to back Angular Contact bearings will need a 1mm thick spacer on the outer raceways only to allow you to preload them axially. Without this, a change in ballscrew rotation could give you endfloat resulting in backlash / loss of movement. Will show it's ugly head when interpolating diameters in particular. So, you have em, fit em. Engineering to the amateur is always a series of harsh lessons. Kudos for your pain in battle though...lol...🤔🤔🤔😀😀🇬🇧

@iforce2d

2 жыл бұрын

I'm pretty sure the blocks are steel. Before flattening the heads of those bolts I showed at the end, I first tried counterboring the hole in the block. The counterbore cuts aluminium like butter but couldn't do much more than scrape the paint off that block, even with a lot of force on the drill press. Naturally I would have used a spacer but as I said, I don't have 'em. If they are ok to be as thick as 1mm then I can make them myself once the machine is back together. Yes it can be some harsh lessons and unlike software programming, there are no backup copies, no copy+paste, and no 'undo' button. :/

@EnglishTurbines

2 жыл бұрын

@@iforce2d Steel blocks?...weird...The bearings should be a transition fit then, a little radial clearance won't hurt, better to glue the outer races in using yellow bearing glue...You could cut some spacers with scissors and plastic card..?...Fit them is my advice, polish out the bearing blocks if you need to...You only do it once..🤔😀🇬🇧

Been down the bearing rat hole myself. Typically you by them as pairs and they have alignment marks that indicate how you align them. I saw el cheapos that you got that I think you should avoid. When you by them as pairs they manually sample them to get the clearance close. The $100 + ones are ground to a specific tolerance as a pair. In my case we were trying to replace bearings in a cheap Chinese spindle, and the ground matched pair was more than the whole spindle. Got a pair at around $40 eventually.

9:57 helicoils m6-m5 next time?

I bloody love my Cnc

I would have busted out the angle grinder with a 60grit flap disk and just hit all the heads of those bolts , but hey you got the job done 👍 built a few CNCs myself and it goes the same for me haha always something and always behind schedule 😂

23:14 when using screwdriver to get that puley off you should twist it, and not use as lever as you were doing. Twisting gives you less force tilting the pulley. Also, going from both sides with two screwdrivers might help

I think most of us have experienced the same frustration. It's hard to stay motivated when things are going good never mind slogging for every centimeter.

Putting holes in the extrusion when you start on one side only is to use an end mill rather than a drill(make sure its bottom cutting, some are not)

Let's Go Hacksaw LMAO

@jotham123

2 жыл бұрын

definitley loosing the plot 🤣

@drkavnger99

2 жыл бұрын

@@jotham123 anything to brighten the monotony of cutting with a havksaw

Nice. You keep calling X carriage as Y and vice versa :) Toolhead is normally mounted to X carriage and Y is the long one or bed slinger on some of the CNC variants :)

@iforce2d

2 жыл бұрын

I think of X as 'sideways' and Y as 'vertical' which seems to be the standard, and is also how the controlling software is oriented. I will be using the machine by placing the long side against a wall and standing on the opposite side, for obvious convenience, which makes X the long axis and Y the shorter axis from that point of view. I also kinda like having XYZ in order of size, largest to smallest.

@flippingwoodforcash9130

2 жыл бұрын

I bloody love my Cnc

Future tip, needle nose pliers jammed in the gap to do the job of the screw driver works on moving both sides at the same time and prevent the back and forth torquing on only 1 side

that was a great ride... let's go hacksaw.....

About the oversized holes. I had make the same mistake. My solution was to make an M10 thread then cut allthread to the plate thickness, saw in a slot for a screwdriver and screw/glue the allthread pieces in. After that i could drill and tap the holes to the correct size. A sideffect was, that these are the only threads that i didn't strip. :-/

The way to make bolts line up is fit one each end (or best aligning pair) and then tap the others through the remaining holes (assembled as it were) You really need a lathe....... 😉....someone has fitted a grub screw into the pulley without providing a relief section on the shaft and the resulting burr is jamming the pulley. If the belt is too long, perhaps just fit an idler pulley.

23:14 alu has a really high rate of expansion, whenever something alu is jammed onto a shaft warm it up, it'll let go rather quickly. 👍 EDIT: nvm LOL heating wouldn't fix that.

@camoogoo

2 жыл бұрын

Depends on how warm you get it. If the pulley starts dripping into a puddle :D

I made the same kind of mistakes (9:57) this week on a new Y plate for my cnc rebuild. Fortunately I didn't have as much time invested as you. Yours looks much better than mine.

@iforce2d

2 жыл бұрын

I got in the habit of pausing for a while, sitting and thinking carefully before drilling holes that will be tapped... and somehow it still happened.

A simple hole in each corner to put an eye bolt with nut on the bottom would have done to lift the Whole table.

20:08 need some button head bolts.

@russcole5685

2 жыл бұрын

In some sizes of metric cap heads,. You can get low profile ones. Pricey mind you. But available if you don't have a sander.

You may want to use washers under the screws that are going into slots especially. In my experience when you tighten a steel fastener into an aluminum slot you'll usually end up digging into it a little bit which can make fine tuning more difficult later as the fastener tends to want to fall into the hole you originally dug

I've had to file this one in my "Music" folder! :o)

@iforce2d

2 жыл бұрын

Once this machine is finished, we might try music sometime :)

35:03 Outer ring is easier to assemble IMHO since it can't slip away sideways while the shaft hasn't yet been inserted. I had to use these shim rings to pretension my bearings too.

If you add a little cutting oil when cutting metal with your hacksaw makes your beloved tool sing. And also you get lucky instantly, because everything has become so f...ing easy in the recent minutes, you really don't have to wank your thingy that hard any more and are finally at the point where you would love a second girl could join your party. With the cutting oil you have definately the right tool to get your girls going at the right speed they demand so pleasing...

Have you thought about putting the linear bearings on top and bottom of the gantry rather than on the back face. It seems you could save quite a bit of overhang rather than needing to provide the space for the bearings. Same goes for the vertical traveling carriage. Would it also work to move the vertical slide bearings outside of the carriage as well. Obviously they would need to be rotated 90 degrees. Just a thought if you are wanting to reduce the overhang. Good Video thank you for sharing the information.

@iforce2d

2 жыл бұрын

I thought about having rails on top/bottom etc, yes. I wanted to have them secured to the same single plate though, ideally with that plate having machined flat sections for perfect alignment. The gantry is only 12mm thick, so to put rails on top would require the rail to be fixed to a second plate, doable but probably a headache for alignment, and less rigid. Also my Z-motor mount is already wrapping closely over the gantry top edge so that would have to be shifted. Similar story for the Z-axis rails. It's all a big juggling of compromises :)

@glennfelpel9785

2 жыл бұрын

@@iforce2d I totally agree with you that all complex designs as this is a balancing act of compromises and I was in no way criticizing your design not at all. Just want to know your thought process. There is a commercial CNC router sold in the US called a side winder and it has the ways very much like yours but on the top and bottom of the gantry, otherwise I likely would not have thought about what it entails. Your design is in fact very stout and rigid. Good design.

Seams like you kind of lost your mind after hack-sawing 24 bolts. I don't blame you! :D

@muh1h1

2 жыл бұрын

Did you not have space for regular hey bolts? Meaning M8 bolts with 13mm HEX heads? They are typically much lower profile

@iforce2d

2 жыл бұрын

Yeah I could have used regular bolts. I think I just got in the habit of buying these socket head ones, wasn't really thinking about the height at the time.

@muh1h1

2 жыл бұрын

@@iforce2d i am a big fan of socket hrads too :)

You're not chasing ppms? I've been watching this channel for naught!?

@KiwiRanger1

2 жыл бұрын

I reckon he's been doing pretty good. For German OCD ppm chasing though....kzread.info/dash/bejne/iaOEstmAqMq9dbw.html

Do you think the jammed pulley had the shaft bore distorted by pressure from the grubscrews? I like the build overall, I'm trying to keep up motivation to finish my build. Edit: I should learn to watch all the vid before asking questions and/or making statements.

Holy shit it is so beautiful

Helicoil not an option for the M5 hole problem?

@robmckennie4203

2 жыл бұрын

Are you paying for that?

Mitutdgd :))) i laughed so hard i almost spilled my coffee

@24:40... no gear puller, but you have a hammer and a vice right? :D

Here's another "suggestion in the comments from somebody."... Get yourself a refill-tube of "Molybdenum Disulfide Grease". You can literally glue each ball-bearing in-place, make AND EAT a ham sandwich, and maybe watch a little telle, and still spend less than 10 mins reassembling those ball-screws... OR don't. BUT at least make yourself a ham sandwich!

@iforce2d

2 жыл бұрын

I used vaseline which sticks them in place reasonably well.