Hi Thanks I did as you said and it worked great.It cost less but at the same time worked very well.thanks.

Excellent idea for making the lead screw tap! I'll have to try that myself. Thanks for sharing! :)

If I only had the engineering knowledge and patience... You never cease to amaze me!

@EducatingSavvas

7 жыл бұрын

Seriously, if I can do this I think anyone can. I'm just taking baby steps, and reading about all thing.

Yet another Great job well done Savvas :-)

anti backlash nuts work as two "separate" nuts, each working in one direction, by making this nut so that it has much more thread on one half and less on the other you will have more wear, ideally nut would have same length of thread on the piece that is bolted to carriage and piece that is adjusted to remove backlash, still if you have tap already you dont have to worry since you can just make more nuts but the design could have been improved.

**NOTE** I've cut my nut-blocks out mirrored so they don't fit on plates in the same orientation as the ones from the open-builds part store. I later redesigned the plates to have openings to these can be adjusted and well. Some of these are now in the wrong places. Worth mentioning if anyone is planning on doing something similar.

Great video as always.

Parabéns pelo vídeo, que Deus abençoe à sua vida!

Beautiful! instead of buying PTFE the expensive way you could salvage it in your local scrapyard and get a way cheaper price for it. There are always local companies which work for industry and technical fields that work with this material and get rid of their cutoffs. I get my PTFE (black PTFE) at the price of 1€ per kilogram at my local scrapyard... that's awesome!! cutoffs often have scratches and dents but as long as you rework them and they are so cheap it's ok. It's a pleasure to work with! By the way I'm really fan of your two channels since I viewed your videos about making your first table saw. Keep on the good job! Cheers

@jamiereader

7 жыл бұрын

Finding a scrapyard like that in the UK is a pain in the backside, sadly.

@EducatingSavvas

7 жыл бұрын

Thanks Nicolas for the comment and suggestion. As Jamie mentioned it's not easy to fine a place like that here, but I'll keep my eyes peeled.

Very Cool Savvas

@EducatingSavvas

7 жыл бұрын

Thanks!

The perfect material for this is MDS infused teflon available at Mc Master Carr. I have seen this stuff do some amazing things as far as wear resistance is concerned. I have seen it outlast regular teflon two years in the same application .

@ALSomthin

5 жыл бұрын

Hey I goofed up! Its actually mds filled nylon ( Molebdenum disulfide ) its been awhile since I used it probably ten years ago. Its pretty inexpensive. I ordered some up from mc master car and made a repacment upgraded adjustable leadscrew nut for the crossfed on my lathe. Now I have zero lash and a super smooth crossfeed with a nut that will probably out last me. Next time you do this and its time to mount and position the nut you can make your nut position adjustable with slots then when its aligned put two small locator pins in it . You can also use flat head screws in some applications for locators since they self locate on the screwhead. Then you can eliminate all the tricky transfer punch stuff and get it perfect with less effort . Good luck !!

Good job.

ஹாய் நன்றி நீங்கள் சொன்னபடி நான் செய்து பார்த்தேன் அது மிகவும் அருமையாக வேலை செய்தது

Good job

This is a great series of videos. Will you be selling plans when you are done?

@EducatingSavvas

7 жыл бұрын

I'll provide a version of the plate designs for free on the Openbuilds forum.

Hello, Was it a good idea to make the nuts from teflon rather than delrin ?

I like it. :-)

Looking good man...;-p

Thanks for the video. Are PTFE nuts durable as the metal one for long periods of use?

at 5 minutes from video there is a minicnc at bottm do you have the design definition from it

Music is diabolical.

Anyone have a source for PTFE blocks I have a need for some for a different project and have not found any online yet.

Amazing work 🤩 I need the stl file please 😍

I was doing the exact same thing, then found 500mm ball screws and anti backlash nuts for circa £30. I to am building a better cnc from a cheep cnc. I was building a cnc without a cnc and stuck my finger in a spinning router bit making lead nuts. That's when I decided that I need a cnc to make my cnc. but the cnc has acme running on teflon nuts and the backlash is a pain in the arse. sooooo..... i am upgrading the cnc that is making the cnc to ball screws. well that's what I told her anyway.

@EducatingSavvas

7 жыл бұрын

I shouldn't laugh, but lol ffs. I did notice that making the tap out of the same material as the lead screw, and tapping the nut blocks with it has really minimised any movement. But I'm sure once everything is vibrating away it will start to fall apart...

What kind of bearings do you use for the lead screws? I see some people use thrust bearings to absorb axial loads, but I'm trying to learn if it's necessary on a smaller CNC router such as this.

@EducatingSavvas

7 жыл бұрын

Just normal ones. There a several types of thrust bearing but I'm not sure it would make such of a difference on my small machine. If I had a thicker lead screw I'd consider them.

@jasonhaglund1557

7 жыл бұрын

Okay, good to know. I'm designing a small machine myself now. I learned a lot of useful info from you videos. Thanks for sharing!

👍👍👍👍

where did you get inserts for router to insert less than 6mm bits???

@EducatingSavvas

7 жыл бұрын

Just off eBay.

Hi. Please, could you tell me the diameter screw you use for the three axes? Thanks!

@EducatingSavvas

7 жыл бұрын

It is TR8x8x2 so 8mm diameter.

what is the bit diameter you used for the 8mm acme thread?

@EducatingSavvas

7 жыл бұрын

The answer is in your question.

@stevenjkirby2020

5 жыл бұрын

I think he's asking what size you drilled the hole out to before tapping it. Obviously if you drilled it out to 8mm you wouldn't have any material left to form a thread from. If the pitch of the trapezoidal screw is 2mm then you should have drilled it out to 6mm I'm guessing?

and the files from this parts video

OUCH, my thumb

why not a split block of reclaimed HDPE, then heat the screw and push both sides on. taping is not going to cut it I fear. google 'neuesten Bauform der Tr-Mutter', first image result, another great design.

@EducatingSavvas

7 жыл бұрын

I don't think that would work or at least it would be very complicated and smelly. PTFE is a better material for the nut block because its low reaction to chemical or heat, and very low friction against the lead screw.

@heavyweather

7 жыл бұрын

HDPE works fine. UHMW is even better. both are self lubricating and HDPE melts at 130°C. doesn't smell. heat it in an old tin can outside.. oven will do also. outside in a box with the blowtorch and some thermometer is best. machine it to size and melt over the screw. this will definitely gain you better clearance than tapping.

@heavyweather

7 жыл бұрын

UHMW is available as machining stock material. I would prefere it over Teflon.

@heavyweather

7 жыл бұрын

The reason I prefere HDPE or UHMW is that Teflon has a melting point of 327°C and therefore can not be thermomoulded over the screw.

@heavyweather

7 жыл бұрын

That said, I am looking forward to your experience with the Teflon nut. Let us know how it works please.

You don't need that or any music!

Please, provide VERY good ventilation if you cut PTFE. Vapors are extremely toxic and carcinogenic.

like watching, but to old to do.