Hi,

Motor running at set speed to start of screwcutting, then Speeds up a bit, with a definite fluctuation, before settling down to a stable speed. Conclusion - Someone (Warp9 or Artsoft) is still Stuffing around with the set speed.

No, thats spindle PID.....you have to tune it, it sounds like its fairly close but PID tuning is the name of the game.

Craig

No. Spindle PID not the issue. Available, but not required in PWM (Used trimpot on module to give good speed control for all functions).
PID not available in OB Spindle (Not in this setup anyway).
There is an issue in the OB spindle Configuration, that only occurs when screwcutting, Perfect for all other functions.
No amount of PID adjustment will fix this.

Hi,
spindle PID is a function of the ESS not Mach.

Craig

Yes, I noticed, but still no value here.

Hi,
no value? It was created and implemented by Warp9 especially to deal with the need to maintain tightly controlled spindle
speed while threading....no value??

Craig

Threading has been working well for a while now (Plenty of variety of threads produced), so the PWM board change was the total solution.

Having said that, Constant volume cutting is a little bit strange. First cut fine, but others way deeper than expected.
Expecting 10 cuts, I get 5 (First cut OK at 1/10 of total volume). I do not think I have missed anything. Mach3 Does this type of cut correctly.
Mach4 - Constant depth cutting is Working fine.
Constant volume is my preferred option, so currently using G32.