Basic Information: Printer Model: Self build printer MCU / Printerboard:bigtree tech SKR 1.4 Klipper reports: SHUTDOWN TMC ‘stepper_y’ reports error: GSTAT: 00000004 uv_cp=1(Undervoltage!) Once the underlying issue is corrected, use the “FIRMWARE_RESTART” command to reset the firmware, reload th…

Also, does lower run current help?

Hello @raoul596 and welcome to the forum! Please attach the requested klippy.log to your next post.

Is it completely 24 volt now, or some 12 volt and some 24 volt? If the latter, are your grounds tied together? The power supplies need to agree on ground, or you’ll get squirrelly behavior.

klippy.log (1.2 MB) Just put the TMC5160 back in to get the log. Hope you can see something.

The printer is completely 24V. Using a power supply I had laying around of 24V 20A.

Which exact TMC5160 are you using? It might require 24V to additionally be connected. Does it give you the error immediately, or after working for a bit?

They are the TMC5160 V1.2 which I bought back in February 2021. The error comes after working for a bit, but the homing sequence can not be completed without getting the undervoltage error.

I don’t have 3d printer experience, so I’m not the best source of information. I built a motion control system with a single linear actuator. I wasn’t sure how much force I’d need, so used a BTT TMC5160 Plus module. My system uses mixed 12V/24V with a Manta M8P V2. Sounds like we’re comparing apples…

Well I am using a BTT SKR 1.3 mainboard and use the ‘push in’ TMC5160 drivers. Only thing you need to do is place 4 jumpers for SPI communication.

Any chance you can put a scope on VM to ground while it’s homing?

TMC5160 not working on 24V conversion form 12V

General Discussion

hcet14 May 15, 2026, 6:41pm 3

Welcome raoul596,

which power supply (or power supplies) do you use. Could you post the exact model names?

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TMC5160 not working on 24V conversion form 12V

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