From the internet, I read that I have to get the Z value of the printer before installing Klipper. I did that and in the printer.cfg, I keyed in:
[probe]
z_offset = 2.0
After bed mesh leveling, I tried to set Z Offset. I went to MAINSAIL to heat the bed to 65C. Then, pressed the HOME icon. Next, I went to CONSOLE and typed probe_calibrate. A GUI showed up and I lowered the nozzle until it started to grab the paper in between the nozzle and the steel sheet. Then, I clicked Accept.
The console showed "probe: z_offset: 1.970
The SAVE_CONFIG command will update the printer config file
with the above and restart the printer.
Am I supposed to put a # sign before [probe] and z_offset = 2.0 to comment them out like the following before typing: save_config from the console? I am concerned that if I leave them there, they may overwrite or mess up the newly calibrated z_offset.
After Home, I keyed in: probe_calibrate and it started at ??? >>> 7.090 <<< ???.
At Manual Probe -0.302 >>> 0.098 <<< 0.198, I feel the friction as I slide the paper. The nozzle is already scratching the paper. If I continue to lower the Z to 0, I may damage the components. Shall I leave it at 0.098
I have not moved the printer but it is strange that this time I could go down to -0.025, rather than +0.098, before feeling friction between the nozzle and the paper as I moved the paper. Shall I click Accept?
I’m not really following up here. @printeruser, what you described in your first post sounded pretty much correct.
Your resulting z-offset of 1.970 could be correct, depending on the probe. Since you ignored the request for a klippy.log, nothing more can be said.
This is exactly what SAVE_CONFIG is doing, and you are not supposed to change anything manually after this procedure, of course assuming your configuration is properly set up.
Thanks. I just re-do the Z calibration using the stock Prusa SuperPINDA at bed temperature 65C. This time it is -0.050 (please refer to the screenshot). Enclosed is the log file for your reference.
Actually do we need to worry if it is positive or negative as long as the nozzle is lowered into a height that we just feel friction as we move the paper below the nozzle?