#20 Old CNC Machine Cutting New One From Acetal #20 / Design Upgrade

[@RCTurbine]

Great videos - thanks for sharing! Learning lots from your work before building my own. Power to you. Thanks Again. Peter

[@johnfithian-franks8276]

Hi, Just to let you know I have at last managed to get a working CNC. I was lucky enough to find a person that works with CNC,s and he took the machine away and sorted the problems. Apparently the programme that came with the CNC did not know what type of CNC it was and was unable to talk to it. also there was a file missing (DWP) and some of the wiring had been damaged. My friend sorted all this out and got the thing up and running and all it cost me was a pint when I see him next. I would not have been able to sort this out by myself but since it has been sorted I have trouble dragging myself away from it and I have produced my first item that was a name plate for my grandson with minions either side

[@EducatingSavvas]

I'm glad you sorted that out, and for a pint - that's a bargain! It sounds like a real jumble of things. Enjoy CNC'ing! :)

[@vedranlatin1386]

Acetal threads IHMO don't come close even to aluminum so watch out for them when you start using the machine. Luckily, you can add a small slot and put in a square nut or one of those dovel nuts they use for wood if they ever fail. Looking forward to seeing what your new machine can do :)

[@EducatingSavvas]

I think this machine will cut aluminium really well one Iv'e trammed the spindle. : )

[@vedranlatin1386]

I have a small Austrian built Emco V10P lathe & mill. The whole machine is some 200kg of purpose made steel - the mill part accounting for some 70kg of that - what you would call reasonably rigid machine for a small shop. It can even cut steel half decently but it still gets resonance and vibrations - even when cutting aluminum. It will cut it all right but surface finish leaves somewhat to be desired. My point is that rigidity is everything when cutting metal, and you need a lot of force to make the tool bite into it. Aluminum framed machine with plastic pulleys will probably do OK for drilling and carving but cutting with endmills is iffy. Don't get me wrong, it's still a great machine, just don't expect too much from it :)

[@jp8479]

great work. consider adding a laser option.

[@EducatingSavvas]

I could do but last time I tried on the x carve it was smelly and felt a bit dangerous.

[@kd-yv6fm]

but acetel cut on my 50w c02 laser cuts like butter but it also has exhaust evacuate online the diode lasers which i wouldn't use to cut anything smelly. good job btw

[@Mr.Donahue]

So what will you end up using your perfected CNC machine? Props and things or tool building...?

[@EducatingSavvas]

Really really intricate artworks... and tools.

[@aspmos]

The older version with the plywood wasn't good? Should I try with ply or it would be a waste of time and money?

[@DanRegalia]

Really digging the build.. But question for you, as you are building out the Z axis, how are you going to compensate for tilt if you need to. I know that if you design it plum, it should stay plum, but the gap between theory in Fusion 360 and real world, as you've seen, can be rather large. So, if there is inconsistency in your cuts, or captain's tape, how do you adjust for your spindle leaning to the left or to the right, maybe because your eccentric spacers are not holding your Z Axis straight.

[@UberAlphaSirus]

That halloumi board looks to be a strong cheese. What bed size would I need for the biggest part? I'm limited to 200x300.

[@EducatingSavvas]

It'll fit - largest piece is 260 tall!!

[@mattyfromlondon]

how much do you estimate you have spent on your machine not including electrics?

[@laleca75]

Do not you have the project in SKETCHUP or PDF ??

[@IceTurf]

How does the Acetal work out? Is it strong enough for a lite duty CNC?

[@EducatingSavvas]

I think if the designs right it's a great material. But for v-wheels aluminium is better.

[@Mike..M]

Is there different types of acetal? I was under the impression that it has great wear resistance but is also brittle. This doesn't appear to be the case.

[@KenColangelo]

Michael Montague I think there is a fiber reinforced acetal that has a much lower coefficient of thermal expansion but I'd imagine the fibers might be made of something that's make it tough to mill - glass, carbon.

[@EducatingSavvas]

Just looked that up. Didn't realise there was reinforced stuff. Be interesting to see if it could be machined.

[@EducatingSavvas]

www.plasticsintl.com/acetals.htm

[@marcinwitkowski6443]

i respect all work you spent on this but.. is it better to buy for 20-30 $ holder for spindle and pus some 50$ ball screw set with all you need ? look on banggood and search for CNC there is all you need... i done it the same like you after all work tolerance and looooooses were to big to work ( and self- resonance) with something more than wood... ;-)

[@EducatingSavvas]

kzbin.info/www/bejne/nYCQf4mNa652eLM

[@Mike..M]

Marcin Witkowski I'm pretty sure you get what you pay for with ballscrews. Some people have stated that the cheaper ballscrews are worse than leadscrews. I personally don't know as I only have experience with leadscrews.

[@IceTurf]

Are the files for these plates available somewhere ?

[@EducatingSavvas]

There are some older versions on my Patreon and on Openbuilds but I have't finished the latest ones.

[@simonhopkins3867]

a blond one. ;)

[@vallondsilva9958]

Can I have fusion 360 file

[@watchingin3d549]

Guy begged half his shit for free then the only things he has to buy, he cheaps out on ffs.

[@EducatingSavvas]

Hi I'm reaching out to you because I'm making a CNC hot air balloon, and I need the hot air that comes outta your ears. Let's collaborate!!