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EverlastEngineering / Malyan-M200

Collection Of Source and Utilities for the Malyan M200, including the factory source code.
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Bed heat up crash #2

Open Mr-Pewpew99 opened 1 week ago

Mr-Pewpew99 commented 1 week ago

When bed and nozzle need to heat up, printer crashes and restarts. Nozzle only or bed only heat up works.

-Printer: Monoprice Select mini v2 -Firmware: v58.158.2

EverlastEngineering commented 1 week ago

I suspect the power supply cannot sustain the current draw necessary for both heaters, so the voltage drops causing the MCU to reboot. I recall reading that some units shipped with lower wattage supplies for north american import reasons.

Any chance you could get a voltmeter on the 12V supply while doing this to confirm?

Mr-Pewpew99 commented 1 week ago

You seem to be right, voltage drops from 12.35v no load to 11.52v with only nozzle or bed heating. When I try to heat both it drops to 2v.

I bought my printer second hand with a 12v 5A supply, what power supply rating do you recommend for it to function properly with your firmware?

EverlastEngineering commented 1 week ago

Well at least this makes sense. I recommend an 8A supply, it should peak around 6 or 7, but even that can vary since the heaters' specs are pretty loose.

An old ATX pc makes a good high current supply if you want to go down that rabbit hole. That was my first attempt at getting faster warmups before I realized the firmware prevented it.

One more thing: double check the connector itself; mine broke internally once and would start up since the pieces were touching, but would shut down when I tried to use it or wiggle the connector. A resoldered it and it was fixed.

Mr-Pewpew99 commented 1 week ago

Connections are solid all around. I will try a power supply with higher current and post my results here.