Suggested PWM frequency for a minimal Novamill conversion

[Ross77]

Ive just done one as well but I used the 7i76 which has the isolated spindle out so I connected direct to the Sprint board.

Clive's the man though and helped me get mine up and running

[GND]

Many thanks Gents - and especially Clive for the detailed information. Those photos make for a very interesting story - you certainly made some far reaching upgrades to your Novamill!

Looks like you used a replacement board from eBay for your PWM to 10v conversion, and set your frequency at 1500Hz. As I mentioned, I am retaining the original converter, so I have no idea what its preferred frequency will be. Reading various sources were suggesting much lower rates, but seeing your board taking a higher frequency was interesting. Maybe I'll just have a play and see what frequencies I can use to get the desired 0 to 10v swing. I guess if I find a frequency that works, then that is as good as any!

Thanks also for the HAL fragments. Today's first job is adding them (or something very similar) to mine.....

Cheers
Graeme