Extreme slow speed after tool change

[Master98635]

Hi, I'm dealing with a rather annoying problem.

When switching tools T0 → T1 and T1 → T0 during printing, I notice unexpected behavior.

During the dropoff G-code, the toolhead moves from its current position to the docking position at the specified speed, for example 200 mm/s. However, after the subsequent message "Selected tool X (tool TX)", the toolhead returns to its previous position at only 10 mm/s.

I have no idea how to solve this issue. Has anyone encountered this before?

I'm currently running version v0.0.0-219-g94756dfd
Klipper v0.13.0-689-g2fb3d54e
Mainsail v2.17.0

[printicus]

Atach your toolchanger.cfg, I will try to look at it.

[Master98635]

Hi, I’ve already figured out what the problem was. It was caused by the "restore_axis" parameter, which I had not defined. Defining restore_axis: z solved the issue.

However, if I set restore_axis: xyz again, the XY axes are once more slowed down to the speed of the Z axis.

This issue could potentially be resolved by adding a dedicated speed parameter for restore_axis.

[printicus]

thas what I was gonna tell you. restore axis only z can lead to oozing due to extra time it takes to go from the restored position to the purge tower. its like a detour...

this is my "returning" path with all axis restored, if you want to try:

    ROUNDED_G0 Y={tool.params_safe_y} F={fast} D=20
    ROUNDED_G0 Z={restore_position.Z+5} F={fast} D=150
    ROUNDED_G0 X={restore_position.X} Y={restore_position.Y} F={fast} D=0
    ROUNDED_G0 Z={restore_position.Z} F={fast}
    ROUNDED_G0 D=0

[Contomo]

However, if I set restore_axis: xyz again, the XY axes are once more slowed down to the speed of the Z axis.

That is klipper, i dont think theres a way around it, same as for accel, klipper/kalico manage seperate XY accels/speed well but Z+YZ moves are unusual and not that well handled internally in the same manner

Timing wise it doesnt make a difference, since Z is the largest contributor here anyways i think?