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Extruder slamming into the print  

New Member
Extruder slamming into the print

I've been using the prusa mini for about two years and it's been perfect every time. After my previous print I noticed that the extruder went down to the bed level and to the back of the print area instead of up and to the right-hand side. 

I didn't think anything of it until my next print where I came back after the six hour print and noticed the extruder had gone to the same location, but this time there was finished print there so the extruder had burned a massive hole in my print.

Why is the extruder not going to the normal home position after printing????

G1 E-1 F2100 ; retract
{if max_layer_z < max_print_height}G1 Z{z_offset+min(max_layer_z+2, max_print_height)} F720 ; Move print head up{endif}
G1 X178 Y178 F4200 ; park print head
{if max_layer_z < max_print_height}G1 Z{z_offset+min(max_layer_z+30, max_print_height)} F720 ; Move print head further up{endif}
G4 ; wait
M104 S0 ; turn off temperature
M140 S0 ; turn off heatbed
M107 ; turn off fan
M221 S100 ; reset flow
M900 K0 ; reset LA
M84 ; disable motors
This topic was modified 2 years ago by NHeadley
Posted : 05/03/2022 8:05 pm
Active Member
RE: Extruder slamming into the print

I suddenly had the same problem. It even twisted the two X-axis rods.

A firmware update to 4.3.4 solved the problem.

Posted : 09/03/2022 9:13 am