Lulzbot Mini calibrating issues

Hi folks,

My Lulzbot Mini has some calibrating issues. Because a video of the issue says more then hundred words I have made a video of it and upload it to youtube:
https://youtu.be/3U8rit6hhyo

The calibration is in the middle of nowhere and not over the washer. Because the Mini does not get a feedback he starts the cleaning procedure and repeat from the start.
I do not understand, why he does not start with the normal cleaning procedure.

I hope some one knows the problem.

Sincerly,
Puzzles

What does your start gcode look like?

It uses the unmodified stock g-code of Cura LE… It shows the same movements after several reinstallations (yes, I deleted the cache before every new installation) and in the different software versions. I will post it this evening.

As promissed:

;This G-Code has been generated specifically for the LulzBot Mini with standard extruder
M73 P0 ; clear GLCD progress bar
M75 ; Start GLCD Timer
G26 ; clear potential ‘probe fail’ condition
M107 ; disable fans
M420 S0 ; disable leveling matrix
G90 ; absolute positioning
M82 ; set extruder to absolute mode
G92 E0 ; set extruder position to 0
M140 S{material_bed_temperature} ; start bed heating up
G28 ; home all axes
G0 X0 Y187 Z156 F200 ; move away from endstops
M109 R{material_soften_temperature} ;
G1 E-30 F75 ; retract filament
M109 R{material_wipe_temperature} ; wait for extruder to reach wiping temp
G1 X45 Y173 F11520 ; move above wiper pad
G1 Z0 F1200 ; push nozzle into wiper
G1 X42 Y173 Z-.5 F4000 ; wiping
G1 X52 Y171 Z-.5 F4000 ; wiping
G1 X42 Y173 Z0 F4000 ; wiping
G1 X52 Y171 F4000 ; wiping
G1 X42 Y173 F4000 ; wiping
G1 X52 Y171 F4000 ; wiping
G1 X42 Y173 F4000 ; wiping
G1 X52 Y171 F4000 ; wiping
G1 X57 Y173 F4000 ; wiping
G1 X77 Y171 F4000 ; wiping
G1 X57 Y173 F4000 ; wiping
G1 X77 Y171 F4000 ; wiping
G1 X57 Y173 F4000 ; wiping
G1 X87 Y171 F4000 ; wiping
G1 X77 Y173 F4000 ; wiping
G1 X97 Y171 F4000 ; wiping
G1 X77 Y173 F4000 ; wiping
G1 X97 Y171 F4000 ; wiping
G1 X77 Y173 F4000 ; wiping
G1 X97 Y171 F4000 ; wiping
G1 X107 Y173 F4000 ; wiping
G1 X97 Y171 F4000 ; wiping
G1 X107 Y173 F4000 ; wiping
G1 X97 Y171 F4000 ; wiping
G1 X107 Y173 F4000 ; wiping
G1 X112 Y171 Z-0.5 F1000 ; wiping
G1 Z10 ; raise extruder
G28 X0 Y0 ; home X and Y
G0 X0 Y187 F200 ; move away from endstops
M109 R{material_probe_temperature} ; wait for extruder to reach probe temp
M204 S300 ; set probing acceleration
G29 ; start auto-leveling sequence
M420 S1 ; enable leveling matrix
M425 Z ; use measured Z backlash for compensation
M425 Z F0 ; turn off measured Z backlash compensation. (if activated in the quality settings, this command will automatically be ignored)
M204 S2000 ; restore standard acceleration
G28 X0 Y0 ; re-home to account for build variance of earlier mini builds
G0 X0 Y187 F200 ; move away from endstops
G0 Y152 F4000 ; move in front of wiper pad
G4 S1 ; pause
M400 ; wait for moves to finish
M117 Heating… ; progress indicator message on LCD
M109 R{material_print_temperature} ; wait for extruder to reach printing temp
M190 S{material_bed_temperature_layer_0} ; wait for bed to reach printing temp
G1 Z2 E0 F75 ; prime tiny bit of filament into the nozzle
M117 Mini Printing… ; progress indicator message on LCD

The gcode seems ok. I can test it this evening.

Have you tried flashing new firmware on the mini?

That gcode runs properly on my mini.

Ok,
It is solved since several weeks but maybe someone has the same issue.

With the help of Lulzbot Tech-support I checked the endstops with the M119 command. Although no endstop was triggered physically Cura showed that y_min was triggered. In this case no callibration is possible.
It seems that I caused a shortcut with the power supply of the heater and the hotend itself. This will damage the Rambo and it has to be replaced.
With a new Rambo everything works fine.

I hope this will help someone with the same problem.