Rear of Gantry falls after print

[Sandman50]

I have a 2.5 350. Problem is that after a print is done and the motors turn off the rear of the gantry drops enough that QGL will fail on the next print.

When that happens I need to manually lift the rear of the gantry to level it out.

What would prevent this?

Higher pre-load rear rails?

Is there a way that I can manually control just the rear Z motors to raise the rear?

 

[Sandman50]

NVM, found the fix. Moved the Z "position_min" from -5 to -10.

[stepper_z]
step_pin: PD7
dir_pin: !PD6
enable_pin: !PF10
rotation_distance: 40
gear_ratio: 80:16
microsteps: 16
#endstop_pin: ^PF5
endstop_pin: probe: z_virtual_endstop
position_max: 340


position_min: -10
homing_speed: 20
second_homing_speed: 3
homing_retract_dist: 3

 

[shiftingtech]

A voron 2.5. Beware the time traveller...

 

[Durahl]

Consider giving this MOD a try - But have a read through my Issue Report first.