Brakes on Stepper Motors

C6D

Hi All,

I realise this topic has been raised a couple of times before with various solutions being put on the table namely worm gears and firmware changes.

What I would like to know is if anyone has had any success operating brakes on stepper motors without making firmware changes? I'm using the Duet 2 eco system with the DUEX 5 expansion board.

I'm planning on driving two Nema 17 with friction brakes. These brakes require a always on 24V signal to disengage. The plan was to get the 24V through a Mosfet Board.

Any help regarding this would be greatly appreciated.

Regards,

Andre

DocTrucker

~~Could use the PS_ON pin and ensure M80 is at the end of your config.g?~~

If you did get a heater fault the steppers could be commanded to drive against the brakes.

C6D

@DocTrucker are you referring to what would happen if I did what you suggested in your striked through comment?

DocTrucker

Yeah, don't do what I suggested!

There is already an enable signal going to the motor drivers; this could be used for disengaging the brake as well i recon?

You'll have to solder to get to the signals (for the duex you might get away with a splice on the 50pin ribbon)

C6D

@bearer I'll try it and give feedback.

Btw, just realized there is a common enable signal for all the drivers if that makes a difference.