Centroid Community CNC Support Forum

Dang, I keep forgetting that.

I have 4.50 on my stick to update and got sidetracked. Just want you to know I'm aware that I hadn't done that yet.

Maybe I'l go do that now

Just did the update. That was easier than I thought.

ecdez wrote: ↑Wed Dec 30, 2020 5:05 pm Just did the update. That was easier than I thought.

Can you please post a fresh report with the new version installed?

Don't know why I didn't think of that myself.

Your issue is the HIGH encoder count you setup in DMMDRV:

Axis Label Motor Encoder Lash Comp. Limit Home Dir Screw
revs/in counts/rev. (inches) - + - + Rev Comp
1 Z 5.0710 32768 0.0000 1 1 0 2 N N
2 X 2.5018 32768 0.0000 1 1 0 2 Y N

You reduce that you can up your MAX Jog rate value.
I run my Emcoturn lathe at 8000 (2000ppr in DMMDRV), Use the existing belt reduction and get 290IP which is PLENY fast enough.....

Marty

Yea, that whole setup had me confused. I fiddled with it for 2 days and finally settled on what you just saw. Can't remember how I got there but something about steps per motor turn or something like that. Can't really remember how I got there. It's been bugging me that I got it to work but never understood how it worked.

As for the question about halving the X turn ratio to get the physical placement correct; is that the best way to do that? I've got 2 CNC mills but this is my first lathe so the whole moving the x half as far as you need to to get the full dimension is blowing my mind a little.

If you want to take .5" off the diameter of a round bar in a lathe, you take .25" cut right?

Take some time to read up on the Centroid lathe operators manual. Lots of good information in there.

Yea, I read the first 4 chapters today and I think I blew my mind.

Reading my own question again just now and I don't even understand it. I need to start fresh in the morning .

Thanks for all your help thus far. I'll get there one step at a time. I forgot how much work the last 10% took when I did my mill.

I'm back at it this morning. I had myself in circles yesterday thinking about it and don't think I explained my confusion very well. Here's a video that I think will help.

I did get my axis dialed in with an indicator so they should be pretty accurate and I increased the rapids some so that's nice too.


I wasn't trying to make a cut with the tool in the video it's just the only tool holder I have at the moment so I was using it for reference.

https://youtu.be/L4pFjmWiLMg


Report from this morning.

Pawn file for reference (I did not edit from what came with the program).