end gcode causes bed to raise

nick9one1

Can anyone help here?

At the end of the print the part got squashed by the nozzle because the bed raised.

gcode file
https://1drv.ms/u/s!AgN3RlWvEHCokb93H1XKK0XF1TT50w?e=eELETA

moth4017

@nick9one1

you have a G28 in you end code, and in your start code you can do G32 for your beg.g file

alankilian

@nick9one1 I see several strange things:

G1 Z5 when exercised in absolute-mode moves the head to the Z=5 position. It does not move the bed down 5mm
G28 X10 Y250 homes the X and Y axis (The 10 and 250 have no effect if I'm reading things right)
G1 X0 Y0 F1000 moves the head to X=0 and Y=0 which might be in the middle of your part if you're running a delta for example

Maybe Change to:

G91 ; Switch to relative mode for the rest of end.g
G1 Z5 E-1 F300 ; move the bed 5 mm away from the last Z position

Then get rid of the G0 X0 Y0 line.

moth4017

@alankilian what type of printer do you have ,?

nick9one1

Thank you for the suggestions.

I've had this printer working well for a couple of years, but I lost all my slicer settings after a reinstall.
Image shows print head in the home position (which is the best place for it to be after a print as it's out of the way).

@alankilian I think youre correct about G1 Z5, this would bring the bed back up to 5mm from the nozzle.

I've added your suggestion. Hopefully this works

G91 ; Switch to relative mode for the rest of end.g
G1 F2000 Z5 ; move bed down
G28 XY ; move head to home on XY

M104 S0 ; turn off extruder,
M140 S0 ; turn off bed,
M84 ; disable motors
M107 ; turn off part cooling fan
M81 S1 ; shutdown after all thermostatic fans have turned off

I should probably look at the start gcode too as I seem to be performing too many G28's.
does it matter which way round a G29 and G30 happen?

; bed.g
; called to perform automatic bed compensation via G32
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Thu Jul 01 2021 15:51:11 GMT+0100 (British Summer Time)
M561 ; clear any bed transform

G28 ; home
;G29  ; probe the bed and enable compensation

G30 P0 X5 Y155 Z-99999 ; probe near a leadscrew
G30 P1 X300 Y45 Z-99999 ; probe near a leadscrew ; probe near a leadscrew
G30 P2 X300 Y239 Z-99999 S3 ; probe near a leadscrew and calibrate 3 motors

Phaedrux

@nick9one1 said in end gcode causes bed to raise:

does it matter which way round a G29 and G30 happen?

You'd want to do G29 after the leveling.