I used the paper method and probe_calibrate to find the Z value. Then, I used save_config to save it to printer.cfg.
When I printed a prime line at the front left, the nozzle was printing the line in air. I guess I need to lower the nozzle to the height obtained in the paper method. How do I get the Z calibrated value into the start Gcode section of OrcaSlicer so that when the nozzle is printing the prime line and subsequently the first layer of the printed object, it is at the correct calibrated height?
You don’t need to put the Z-offset into your slicer. Klipper handles it automatically.
Can you try the below procedure and tell me what happens please?
Home all axes
Place paper below nozzle
Using Mainsail/Fluidd/KlipperScreen, move the nozzle to Z0
Is the paper well-gripped between the nozzle and the bed?
If not, you can use the Z-offset function in your UI (screenshot shows Mainsail) to jog the nozzle up/down until the paper is well-gripped, but not impossible to move, below the nozzle. Then, click save (the save button appears only after you modify your Z-offset).
Yesterday and previously, I placed the paper in between the nozzle and the steel sheet. Then, used the UI to lower the nozzle until I felt friction between the paper and the nozzle while moving it. Then, clicked Accept followed by save_config to save the information to printer.cfg. I will repeat the procedure again once I know what you mean by Z0.
After I entered Z = 0 in Step.3, the paper is gripped between the nozzle and the bed. However, I can still move it around while feeling friction. Do I need to issue a: save_config?
I changed the start G-code. Now no mid air printing but as you see from the screen shot, the boundary was not made correctly and the 1st layer of support (large light green area) was not well made. I just terminated the print job.
Here is the G-code under Machine start G-code section of OrcaSlicer:
M862.3 P "[printer_model]" ; printer model check
M862.1 P[nozzle_diameter] ; nozzle diameter check
M115 U3.13.0 ; tell printer latest fw version
G90 ; use absolute coordinates
M83 ; extruder relative mode
M104 S[first_layer_temperature] ; set extruder temp
M140 S[first_layer_bed_temperature] ; set bed temp
M190 S[first_layer_bed_temperature] ; wait for bed temp
M109 S[first_layer_temperature] ; wait for extruder temp
G28 W ; home all without mesh bed level
;G80 mesh bed leveling
; Always pass `ADAPTIVE_MARGIN=0` because Orca has already handled `adaptive_bed_mesh_margin` internally
; Make sure to set ADAPTIVE to 0 otherwise Klipper will use it's own adaptive bed mesh logic
BED_MESH_CALIBRATE mesh_min={adaptive_bed_mesh_min[0]},{adaptive_bed_mesh_min[1]} mesh_max={adaptive_bed_mesh_max[0]},{adaptive_bed_mesh_max[1]} ALGORITHM=[bed_mesh_algo] PROBE_COUNT={bed_mesh_probe_count[0]},{bed_mesh_probe_count[1]} ADAPTIVE=0 ADAPTIVE_MARGIN=0
{if filament_settings_id[initial_tool]=~/.*Prusament PA11.*/}
G1 Z0.3 F720
G1 Y-3 F1000 ; go outside print area
G92 E0
G1 X60 E9 F1000 ; intro line
G1 X100 E9 F1000 ; intro line
{else}
G1 Z0.2 F720
G1 Y-3 F1000 ; go outside print area
G92 E0
G1 X60 E9 F1000 ; intro line
G1 X100 E12.5 F1000 ; intro line
{endif}
G92 E0
M221 S{if layer_height<0.075}100{else}95{endif}
First layer also did not go well. I then cleaned the steel sheet and tried again. However, the situation does not improve. Please refer to the screenshots.
I thought it might be due to a clogged nozzle but after using a needle and tightened the idler door, same problem. Reducing the print temperature from 230C to 220C did not help. Tried both standard and adaptive bed mesh leveling but same thing. The strange thing is that I made a successful print after I added Input Shaping yesterday but today when I made the same print, same poor first layer.
To make things simple, I uncommented calling of FLAP in printer.cfg. The printer printed the prime line in mid air again. Then, it lowered the nozzle until it reach the right region to print the object. Again, poor first layer.
I have no idea what is wrong.
The poor 1st layer strange problem is gone after I replaced all the files in the config folder by the ones I backup yesterday.
Now back to the original problem of printing the prime line mid-air. After Homing, it did an adaptive bed mesh leveling. Then, as the extruder moved from the right to the left, it printed a prime line mid-air. Then, printed another prime line from left to right. After that, it started printing.
The problem seems to be caused by the nozzle not being close enough to the steel sheet after adaptive bed mesh leveling. I manually added a G-code in the Start G-Code of the slicer to move the nozzle to 2mm in height in absolute coordinate. The the prime lines were printed on the steel sheet.
