[TMC2130][PSU on/off] Request for a bit of hacking

Hello

I am trying to make these drivers to work, but I have my PSU by default, I have just arise an Issue in github\MARLIN so that the M122 command does not work if the psu is off (I have the protectors on so no problem with EM issues)

I have 2 psu on my printer, one small that turns on with the printer and feeds the RAMPS and arduino ,and other 12V PSU which turns on when MARLIN sends M80 GCODE.

The question is :

HAs someone come up with an idea to deal with these drivers without the 12v psu on...a jumper, a diode, more cabling?

I hope you understand what I am requesting!!

Let me know if you need more information.

Thank you all.

It is my understanding that the TMC2130 requires the Vmot to function (unlike some other stepper drivers) , and it must be powered on before your firmware tries to configure it.

So basically M112 is not possible until it has Vmot power

Ok, thanks.

I sent a question to GITHUB\MARLIN in order to make some change,on this.

Thank you.

your question and proposal are not well formed.

you can use an ATX computer power supply to do both. search here on reprap.org for it. +5VFSB to power the mega/ramps and then trigger the PS_ON

you can trigger a relay via one of the unused pins, either digital or analog to control power. i think you would do this on the 12V side.