I have to adjust z height every time I start a new print
Ok, I am exclusively using Slic3r and PETG to print my models.
I first calibrated the printer using the included PLA and everything looked fine.
I then loaded my PETG filament, had to back off the Z live adjust to -0.045 from -0.350 for pla.
It printed perfectly. I removed the object from the print bed and when i attempted to print a duplicate model, the filament was way too high, i had to live z adjust down to -0.400 for it to stick like before..
This seems wrong. I checked the probe, everything is good there.
Do i have to calibrate Z every time before a print? I thought it did that mesh bed level thing before printing every time??
How can i fix this?
ALSO id love to run the V2Calibration gcode with my PETG filament, but its hard coded to print at a much lower temp (obviously for PLA) so thats a no go.
I was told online that live z adjust can be done with ANY STL and it will save.
Re: I have to adjust z height every time I start a new print
Below is the V2 Calibration gcode. I'll leave it as an exercise for you to spot where to change the temperatures 😉
M107
M104 S210
M140 S55
M190 S55
M109 S210
G87
G88
G28
G92 E0.0
G1 X60.0 E9.0 F1000.0
G1 X100.0 E12.5 F1000.0
G92 E0.0
G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
G1 E-1.50000 F2100.00000
G1 Z0.150 F7200.000
M204 S1000
G1 F4000
G1 X50 Y155
G1 F1080
G1 X75 Y155 E2.5
G1 X100 Y155 E2
G1 X200 Y155 E2.62773
G1 X200 Y135 E0.66174
G1 X50 Y135 E3.62773
G1 X50 Y115 E0.49386
G1 X200 Y115 E3.62773
G1 X200 Y95 E0.49386
G1 X50 Y95 E3.62773
G1 X50 Y75 E0.49386
G1 X200 Y75 E3.62773
G1 X200 Y55 E0.49386
G1 X50 Y55 E3.62773
G1 E-0.07500 F2100.00000
M107
M104 S0 ; turn off temperature
M140 S0 ; turn off heatbed
G1 X10 Y180 F4000 ; home X axis
G1 Z10 F1300.000
M84 ; disable motors
Re: I have to adjust z height every time I start a new print
Same problem here, after tweaking zindex with petg.. The printer started saying that was not calibrated
Re: I have to adjust z height every time I start a new print
I flashed the latest 3.09 firmware and re-calibrated (hopefully it stays).
The issue i have now is that my PETG wont stick to the bed. My Live Z offset is -0.470 and if i go any lower it will start to get wiggly on the bed and curl up behind the nozzle.
PETG likes to be barely smooshed when laid down, im wondering if i should sand the pei surface? I tried cleaning it with rubbing alcohol, but i still see streaks on the bed after it dries?
Im about ready to put some painters tape on the bed..
Re: I have to adjust z height every time I start a new print
PETG likes to be barely smooshed when laid down, im wondering if i should sand the pei surface? I tried cleaning it with rubbing alcohol, but i still see streaks on the bed after it dries?
Im about ready to put some painters tape on the bed..
Some have suggested a light coating of the included glue stick will help with PETG. I used to use glue stick on painters tape with my other printer for PETG, and it worked well, so I would start with gluestick on the MK42 bed first. It cleans up very easily with a damp cloth.
Re: I have to adjust z height every time I start a new print
I actually tried with the gluestick and had bad results directly on the PEI. IT was difficult to remove as well. It kept ripping my wet paper towel when scrubbing it off.
My last printer was glass bed so it was much easier to clean.
I will attempt the painters tape when i get off of work. I'll update with my results.
Re: I have to adjust z height every time I start a new print
I actually tried with the gluestick and had bad results directly on the PEI. IT was difficult to remove as well. It kept ripping my wet paper towel when scrubbing it off.
Yeah, you would be better off with a cloth towel to remove the glue. I can see the paper towel would disintegrate and stick to everything.
I wear glasses, and every time I get a new pair, or visit the optician, they give me a lint-free cloth. I have about 10 of them, and found that one of those works great, both for cleaning glue from the bed (just moisten it with a little warm water) and a different cloth to quickly wipe the PEI bed with alcohol before each new print.
Good Luck!
Re: I have to adjust z height every time I start a new print
If you use painters tape you will need to redo your z-offset.
