Polycarbonate (Lexan) quick cutout on the new CNC
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- Опубліковано 16 чер 2022
- Making some polycarbonate panels:
Single Flute Upcut 6mm DLC Tool, 4m/min, 5mm DOC, 6mm WOC, 21k RPM.
Workholding could have been better, but it worked fine in the end. - Наука та технологія
Awesome job Andrej 👌🏻
Thank you Wayne. Cheers.
Want more please 👍🏼😁
That is some feed speed! How does the feed speed relate to the spindle speed? I'm using a handheld wood router with variable spindle speed but I won't get anywhere near to 4m/min for obvious reasons! I'm using a double fluted 8mm diameter tool just to do a small rebate 3mm wide, 1.5mm depth of cut. I'm guessing I should slow it down because the tool won't be feeding so quick so more heat will build up which I want to avoid.
Thanks. Plastic does not like heat much for obvious reasons. So I try to go with relatively high chipload (make big chips) which carry the heat away from the cut. In this particular case it was about 0.19 mm/tooth. If I used a two flute endmill I'd have to halve the RPM or double the feedrate to keep the same chipload. So for the relation between spindle speed and feedrate (and flute count) look for chipload calculators. Ofcourse the recommended chipload will vary between different tools and materials. FSwizzard mobile app is pretty good for example although the free version does not have a big material list. But you can find other online.
@@crabsshed Brilliant! Thanks so much for your detailed response!
EDIT: I have worked out that I need to set my router at it's lowest RPM 11,500 and I will need to make my 500mm cut in around 7.5 seconds, which ends up at 4.3m/min feed speed.
@@aries6776 No problem ;)
I cut with D-3MM, 1flute got upcut and downcut in use. Working on 6 to 10 MM polycarbonate. But cant cut faster then 3m/min on RPM 14k.
Have any advice to improve on this specyfic tool to work faster without losing clean edge? Any advice be nice.
Thanks and sory for not good english by the way.
Man what kind of bit and speeds are you using??
Everthing is in the video description ;)
Why a 1 flute bit as opposed to a multi flute bit? I understand the upcut to pull debris up and away from the workpiece, just dont get when and where to use a single flute vs a 4 flute.
Best chip evacuation IMHO, 2 flute works great too with a larger diameter tool. Small tool with lot of flutes is easy to clog.
Yes, in the past couple weeks Ive been experimenting with carving custom xmas tree ornaments in poly, and its just been a mess with the bits I have. Guess I get to order more parts now... Yay! @@crabsshed
Single flute for most plastics and aluminum at high rpm. The chip evacuation and chip loading allows you to cut without melting, plus it aids in evacuation. Most of them are polished as well.
What model machine is this?
One I designed and built myself 😉. Nothing commercially available. Slightly inspired by the printNC cnc (steel gantry).
Is the machine for sale?🙂
@@peterzakutansky1418 no, only one piece exists and I need it 😉
Hello what is the spindle speed please?
Ah I forgot to add that to the description. It's 21k RPM.
@@crabsshed great thanks