CoreXY (Sensorless) Homing using single stepper

[IamSLyToo]

Is your feature request related to a problem? Please describe.

No response

Are you looking for hardware support?

No response

Describe the feature you want

Hello, I would like Marlin to allow me homing the X and Y axis on my CoreXY printer this way:

• De-energise one of the XY stepper
• Rotate the second XY stepper -> The print head carriage will end up in one of the corner
• Either:
  • The Sensorless capable driver triggers as the stepper cannot be rotated any further Or
  • The X and Y end-of-course microswitches are both triggered
• Re-energise the first XY stepper
• X and Y are now homed Cheers! :)

Additional context

No response

[thinkyhead]

What is the difference between de-energizing one of the stepper drivers and simply not moving one of the steppers while it is still energized? How does this differ from just using QUICK_HOME with core kinematics?

[IamSLyToo]

Hello, The difference is that if you keep the first sepper energized, the hot-end carriage will stop as soon as it gets to the end-stop of any X or Y rail. If you have it de-energized, the carriage will do the same, but then, continue until it reaches the second end-stop, placing itself in one of the corner. X an Y homing is therefore done as a single action. Furthermore, it would be more reliable in case of a CoreXY sensorless homing because if you home X, then Y afterwards, there is a possibility that the second homing would skip a step on one of the stepper only and this way mess with the first homing ...

Sylvain ✈️

On 17 Jan 2022, at 11:00, Scott Lahteine @.***> wrote:

 What is the difference between de-energizing one of the stepper drivers and simply not moving one of the steppers while it is still energized? How does this differ from just using QUICK_HOME with core kinematics?

— Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android. You are receiving this because you authored the thread.