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[BUG] TMC2209 homing brake after BACKOFF #27151
Comments
Configs are for 2.1.2.2 Please test the |
Hello, I deployed this assembly in a minimal configuration for testing - I connected the motor to the X-axis. But I could not conduct research, since after homing it immediately occurs system halted. This happens even when sensorles_homing is disabled and is triggered immediately after the software limit on the X-axis values is exceeded. If sensorles_homing is enabled - behavior as in the topic of the post, and then halted immediately after stopping the motor.
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Did you test the latest
bugfix-2.1.x
code?Yes, and the problem still exists.
Bug Description
Hello
I have a five motors 17HS4401 with TMC2209 on scr 1.4. All motors operate correctly when performing linear motion (G0 command). The first four motors have a speed reduction of more than 4 and homing is correctly, unlike the last one. The last one (J motor) has a speed reduction of 1 to 1 and stops when the "G28 B" command is called immediately after BACKOFF. I tried to change microstepings,travel speed, homing speed, backoff bump, change current. This didn't work. Helps only if I change speed reduction more then twice for example (DEFAULT_AXIS_STEPS_PER_UNIT parameter, currect is 8.88 (200*16/360) for my configuration). but it doesn't suit my mechanics. If i change J_STALL_SENSITIVITY to 1..5 it start homing, but then when the motor has met a physical limitation, he does not stop but tries to break through it, so that the shaft begins to spin.
VID_20240604_215113_437.mp4.mov
Bug Timeline
No response
Expected behavior
No response
Actual behavior
No response
Steps to Reproduce
No response
Version of Marlin Firmware
Marlin 2.1.2.2
Printer model
No response
Electronics
No response
LCD/Controller
No response
Other add-ons
No response
Bed Leveling
None
Your Slicer
None
Host Software
None
Don't forget to include
Configuration.h
andConfiguration_adv.h
.Additional information & file uploads
config.zip
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