Hi, one of the carts on my Delta printer sags a bit after homing. The others keep the endstops pressed but one of the carts sags more than the others after homing causing the endstop to be depressed.
I believe this also causes issues with printing. During printing the first layer is squashed too much on the opposite side on the heatbed.
I think it's the Z endstop causing the sagging. I have switched around the cables and endstops and indeed the problem moved with the axis driver so it's not the motors or any mechanical problem. Could it be a faulty driver? The machine works really well otherwise. It's only sagging of one axis after homing.
Now I'm thinking could it be holding torque being too low for the trinamic drivers? It's strange that it's only with one motor.
Searching for 'delta axis sagging after homing' didn't yield any useful results.
I'm using the latest Marlin 2.x bugfix with an SKR 1.3 and TMC2208 drivers. HOMING_BACKOFF_MM is commented out.
Could it be that I have to set this value higher??
#define HOLD_MULTIPLIER 0.5 // Scales down the holding current from run current
Edited 1 time(s). Last edit at 01/03/2020 09:07AM by Ohmarinus.
http://www.marinusdebeer.nl/
