Breakout Board

[Jonathan]

Good to see that you appear to be doing the isolation properly...more than can be said for some.

You could add an option for a different voltage range for spindle control.

40 kHz is a bit low. Most will only run at 25-35kHz with Mach3, but you can have more and a lot of drivers claim to do 200-300kHz.

[croy]

actually the components i have used are rated at 80kHz, i am just being cutious.

[John S]

40 kHz is a bit low. Most will only run at 25-35kHz with Mach3, but you can have more and a lot of drivers claim to do 200-300kHz.

The opto isolation is only on the inputs.
Driver outputs reply on the driver isolation

[Jonathan]

The opto isolation is only on the inputs.

Ok, didn't realise that as it wasn't stated in the info...40kHz is obviously plenty for the inputs.