Suggested PWM frequency for a minimal Novamill conversion

[GND]

Just to close the loop here, I now have a working speed control on my Novamill, essentially using the lines in the HAL file that you supplied Clive - many thanks for that, it saved a lot of grief! I added them into the "custom" HAL file rather than the main HAL file, as this means I can make new main HAL files using the PnCConf tool, and not overwrite my edits. But the content was pretty much as suggested and it worked fine.

And to answer my original question - in case anyone comes and finds this thread in the future. I tried 100Hz, 1000Hz and 1500Hz and there was no discernable difference between the results. That was as measured using a digital voltmeter on the PWM to 10v converter output - the original Novamill one. So the conclusion - it's not critical!

Thanks again Clive for your help with this. Now to try the first tentative cuts....

Cheers
Graeme