Shorted stepper motor mainboard 6HC
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I dropped a screw on my mainboard around the driver2 trinamic stepper IC. I saw and heard a sizable spark. Around the same time my board registered an event saying a few of the drivers had been shorted. I unplugged the board from power and attempted a homing of the printer.
Everything is find except the printer won't move the z-axis, instead it just sits there with a "busy" status. eventually it will time out saying that the probe was not triggered.
Is my board fried?
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@feynman137 could you take a few pictures of the affected driver and post for people to assess? that would help determine if the damage is repairable for someone.
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Sure it doesn't look so bad to me. Looks like a capacitor is destroyed. I do have lots of SMD capacitors on hand, I don't know what capacitance this is though, also if the Trinamic IC is destroyed.
Also in the config file there are 4 z axis steppers. Would all of them be damaged or just one..? The event/fault seemed to be on all of them even though the screw was dropped on one.
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@feynman137 looks like that's the cause of your spark it appears to be arc damage to the caps, the schematics are here to find out what they are rated at -
https://github.com/Duet3D/Duet3-Mainboard-6HC/tree/master/Duet3_Mainboard_v1.01
I`m afraid I don't have enough electrical know how to tell you how to test them safely whilst mounted, maybe someone else on the forum will be able to assist, but I'd start by cleaning the board to make sure there isn't any other metallic debris around the driver and then test/replace the obviously damaged components.
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"Do the four dual mosfets between the driver chip and the connector look OK? If so then replacing the TMC5160 and the capacitor will probably fix it."
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@phaedrux I just decided to drop in a new mainboard 6hc will fix this one later by replacing the ICs suggested. I am running using a raspberry pi 3B+ and figured I could just swap all the wiring to my new board. Is this correct? I have backed up all the files from the old board just in case.
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