Servo causing MCU disconnect

General Discussion
1

Basic Information:

Printer Model: Custom AWD CoreXY
MCU / Printerboard: BTT Octopus 1.1
Host / SBC: RPI 4
klippy.log

I am trying to control a servo for a Euclid dock but when using a larger MG995 Servo the MCU disconnects after sending a servo command. The command does execute as expected. When using a smaller HXT900 9G servo it works as expected, no disconnects. I see in the klippy log an emergency shutdown but I can’t figure out why

MG995 Datasheet: https://www.mpja.com/download/31150mp.pdf
I’m too new and can’t put more than two links so no datasheet for the 9g servo.

klippy.log (110.4 KB)

2

Where have you the Vcc of the servo connected to?

Maybe it’s a bit too much current for the printer board.

3

I’m connecting it to the BLTouch port.