Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

MMU_CALIBRATE_BOWDEN BOWDEN_LENGTH depends on extruder_homing_endstop - working as intended? wiki update needed? #588

Open
jfurner opened this issue Jan 6, 2025 · 1 comment
Labels
believe fixed / answered The bug is believed fixed in latest release documentation Improvements or additions to documentation

Comments

@jfurner
Copy link

jfurner commented Jan 6, 2025

In some testing recently I found the following behavior:

  • If extruder_homing_endstop: collision, then during Bowden calibration BOWDEN_LENGTH needs to be shorter than the actual value (this is how the wiki describes it, measure the distance and subtract a bit from it). In this case it performs a fast move at BOWDEN_LENGTH, then short moves until collision is detected. Calibration fails if collision occurs during the fast BOWDEN_LENGTH move.

  • If extruder_homing_endstop: extruder, then BOWDEN_LENGTH needs to be longer than the actual value. In this case it performs a single fast move until the extruder switch is triggered. Calibration fails if the switch is not triggered by the end of the fast BOWDEN_LENGTH move. Following the wiki guide to subtract from the measured distance will result in calibration failure in this case.

If the above behavior is the intended function, could the wiki be updated to advise either adding or subtracting from the measured distance, depending on extruder_homing_endstop setting?

@moggieuk
Copy link
Owner

moggieuk commented Jan 11, 2025

@jfurner Thanks. The wiki is a little bit behind the codebase where enhancements have been made to the bowden calibration. I have just given the wiki a bit of an update:

https://github.com/moggieuk/Happy-Hare/wiki/MMU-Calibration#---step-5-calibrate-bowden-length

It would be great if you could review for clarity...

@moggieuk moggieuk added documentation Improvements or additions to documentation believe fixed / answered The bug is believed fixed in latest release labels Jan 11, 2025
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
believe fixed / answered The bug is believed fixed in latest release documentation Improvements or additions to documentation
Projects
None yet
Development

No branches or pull requests

2 participants