What Nozzle Temp When Bed Leveling for ASA?
I am setting up to print some parts that will be outdoors so I'm going to use ASA for the first time after printing exclusively with PLA and PETG. My modified Mini (BMG dual extruder and Mosquito hot end) has a acrylic enclosure with a fan and dryer hose that exhausts any fumes to the outside. The Live Z has been adjusted to give a nice first layer and the FilamentOne ASA ProSelect prints the test patch like a dream. So things are printing better than I expected.
So what's my problem? When waiting for the printer to go through the bed leveling routine the temperature has to go from room temperature to 260 C to load the filament, down to 170C to do the bed leveling and then back up to 260C to do the print. This takes much more time than with PLA or PETG since the filament printing temperature is higher. The bed temperature is set to 100C and it remains there doing the whole process so there is no prolonged waiting for it to heat or cool. I know how and where to modify the G-code in the slicer to change the nozzle temperature during the probing, but I don't want to test the temperature limits of the PEI sheet without first getting some advice.
Can I set the extruder temperature above 170C for the probing process or will I be risking putting some melted spots on the smooth PEI sheet? If I can go higher, how much is safe?
SS//
RE: What Nozzle Temp When Bed Leveling for ASA?
It sets the temperature to 170 for a reason. That is the ideal temp to level. I would not change this.
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Chuck H
3D Printer Review Blog
Why?
Yeah, but why? What does the hotend temp have anything to do with the PINDA sensor? It seems far enough away to not be affected by that little of a temperature difference.
It sets the temperature to 170 for a reason. That is the ideal temp to level. I would not change this.
reply
I don't think there's ideal nozzle temperature for leveling. In my opinion, 170C is chosen to prevent (reduce) filament oozing during leveling. The problem is (in this case), this temperature is used as general "no ooze" temperature, where PLA is used as reference -no matter what filament type is actually used.
I'm sure that Prusa team could make slicer smarter than that and increase "no ooze" temperature depending on actual print (nozzle) temperature (i.e. "no ooze" temp is 45C lower than print temp). But then, maybe there's something I don't know.
[Mini+] [MK3S+BEAR]
quibble
170C is chosen to prevent (reduce) filament oozing during leveling - then that might be the right temperature. Let's not quibble over the word ideal, but less oozing would be one criterion I would put in the perfered leveling temperature.
I don't think there's ideal nozzle temperature for leveling. In my opinion, 170C is chosen to prevent (reduce) filament oozing during leveling. The problem is (in this case), this temperature is used as general "no ooze" temperature, where PLA is used as reference -no matter what filament type is actually used.
I'm sure that Prusa team could make slicer smarter than that and increase "no ooze" temperature depending on actual print (nozzle) temperature (i.e. "no ooze" temp is 45C lower than print temp). But then, maybe there's something I don't know.
--------------------
Chuck H
3D Printer Review Blog