Bed Calibration Temperature
I own a Mk3S+ and a Mini + both with the super pinda. So why is the 9 / 16 point bed calibration different on both machines. The Mini calibrates at 170 Deg C whereas the mk3+ calibrates at full working temperature? Given they both have the latest software and same calibration hardware I would expect the calibration routine to be the same.
Paul Ballard
There is no shared code between them
Those two models do not use the same codebase. One is 8 bit (MK3S EINSY). One is 32 bit (Mini). They use different beds, and different extruder approaches entirely as well.
RE: Bed Calibration Temperature
The grid matrix can be changed in the G29 command (if you want to).
Here a small overview of the different possibilities (Marlin, Reprap....): https://reprap.org/wiki/G-code#G29:_Detailed_Z-Probe
However, to do this, you need to take into account the specifics of each printer model (Prusa is not all the same).
I always perform bed calibration at operating temperature (nozzle and print bed brought to operating temperature for approx. 20 minutes).
wbr,
Karl
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.
RE: Bed Calibration Temperature
Thanks.
Paul Ballard
RE: Bed Calibration Temperature
Hmmm.. so why the temperatures need to be different? Or to rephrase: why 170°C isn't high enough for MK3S? I ask, because I couldn't find official explanation.
[Mini+] [MK3S+BEAR]
RE:
The lower temperature of 170 could be to prevent oozing during leveling. Perhaps this is more of an issue for the Mini's?
Mk3S+,SL1S
RE: Bed Calibration Temperature
The only reason is historic. Some of us modified our start gcode for a no ooze startup on the mk3 printers years ago. Anyone can do that by modifying their own start gcode for any printer. Prusa didn’t add it to the mk3 start up as they didn’t want to change the existing operation for anyone using it. That’s pretty normal when releasing software, it’s usually better to keep the same operation to existing default behaviour or you get lots of complaints from the user base. After all, anyone who wants to change it can do so easily.
When Prusa released the mini and they didn’t have an existing user base for that printer they incorporated the 2 stage warmup from the start. And that decision caused LOTS of people who bought them to think the printers weren’t working right as they didn’t heat up to the temperatures set. Just go through some of the old posts on the forum and you will see.
RE: Bed Calibration Temperature
Great thanks for the background.
Paul Ballard
RE: Bed Calibration Temperature
@neophyl
Thank you for explanation (it makes sense to me).
[Mini+] [MK3S+BEAR]