I think this is Winston’s current link.
Attached is the slightly messed about with version I’ve currently got in Fusion in case you have any trouble with Winston’s library.
Carbide3D Tools.tools.zip (4.2 KB)
edit - I’m cutting wood and plastics, I wouldn’t even think about those feeds and speeds for metal.
Thanks 
I wont be cutting metal till I move.
Just to check…
Your Modkita is spinning in the correct direction? Sharp faces first?
If your spindle runs backwards at 20k RPM you do get some cutting effect but smoke not chips, I was careless one day rewiring my spindle to the VFD and didn’t check properly, the instant smoke told me to press the big red switch and figure out where I’d been a muppet.
…OMFG… You are right. It is running backwards.
I am so confused now.
Ooops 
Well, nothing that swapping a couple of wires around won’t fix.
I just changed the direction in the ODrive config.
I’m just wondering how dull my end mills are from this.
Depends how long they were running backwards and how hot they got.
I used some tool cleaner and a brass wire brush on the unlucky 1/4" bit from mine to get the resin goo off it and it seemed no blunter than it was before.
In the meantime, you could change your avatar to Arthur Brown 
Apparently a soak in 50/50 laundry soap and water for 30 minutes can get the residue off.
Seems to have loosened the crud, but might need a brass brush still.
Either that or a bit of wood to cut…
So this explains why my HDPE cutting boards weren’t cutting properly
Yep, melting your way through them backwards is likely to make them a little stringy 
@CthulhuLabs Maybe you could request that this thread be reopened? 
Can’t wait to see your progress with the endmill spinning the right way!
Cutting HDPE with a endmill spinning the right direct:
@gmack Here is the data file:
ODrive_Test_2020-07-26 11_39_02.zip (20.7 KB)
Some of the values are negative now because the spindle is going in the opposite direction. I will pass those through an ABS() function on the arduino in my next iteration.
If you could send me back the spreadsheet you are using to generate those graphs it would be really handy.
The surface finish is flawless. God I feel like an idiot. lol
What were you doing? Endmill and stick-out, depth and width of cut, spindle speed, and feed rate?
Whoops… actually no. It was not the #201. It was a 1/4in 2 flute down cut endmill. I thought i had the #201 loaded though.
