Initial Z coordinate
I'm trying to figure out what the initial setting for Z should be at the beginning of a print. The V2Calibration file contains the code shown below.
G28 is "home all". I assume this is 0,0,0. Then the starter line is drawn (at Z=0), but then there is a move to Z0.150 before printing begins. I have seen this pattern in other Prusa Slic3r gcode as well, so I don't think it's specific to the calibration.
Can someone explain what is happening here? Where is Z "home" (I'm assuming the nozzle is not touching the printbed)? Why the move to Z0.15 before printing?
I'm trying to adapt CraftWare gcode for use with the Mk2, but it doesn't include the initial +Z move, and I think the first layer is too low.
G28 ; home all
G92 E0.0 ;reset Extruder to 0
G1 X60.0 E9.0 F1000.0 ; starter line
G1 X100.0 E12.5 F1000.0 ; starter line
G92 E0.0 ; reset extruder
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
Re: Initial Z coordinate
Bob
Z Home is actually at 0.15mm, which is the closest the nozzle should be to the bed to avoid heat damage to the PEI sheet.
The limit is set in firmware and can be seen on the LCD after a home operation.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…