100°C bed temperature?
I've ordered the Mini, but since wonder if I can use all materials, I use with the Mk3s (in an enclosure): with all ABS filaments, I work with, I start with a 105°C bed temperature, and with most, this seems to work. Some need 110°C; one even warped so hard that it got loose in the first layer already. 125°C 1st layer bed temperature solved this. When I tested the best bed temperature for the problematic filament, I also noticed that the Mk3s will do a temperature cutoff at 130°C.
Now, the Mini is said to have a max bed temp of 100°C in Josef's announcement in the comparison table. The Mk3s is listed in the next column with a nominal 120°C. Does that mean the Mini will cutoff at 110°C?
I do also wonder what limits the bed temperature in the Mini? Power supply? Relay? Heater element? Bed materials?
RE: 100°C bed temperature?
I think there is motivation to draw some level of separation between the mk3s and the mini.
RE: 100°C bed temperature?
That'd be fair enough. Wonder how complex a hack for temperature increase would be.
RE: 100°C bed temperature?
Probably just firmware change.
RE: 100°C bed temperature?
@phr0ze
most probably the limit is not accessible via gcode/the menue and the board only accepts digitally signed firmwares so you can only upload those or loose waranty when breaking the appendix on your board to disable the signage checking.
RE: 100°C bed temperature?
I don't wanna give you bad ideas, but what if you change the hardware instead of the software? Temperature is a resistance. If you use another thermistor or additional a resistor, you could easy simulate a temperature which is less than in real -> bed will heat and maybe get broken because it's not built for higher Temps. Only an idea. There is a reason they added that appendix :/
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RE: 100°C bed temperature?
I think the limit to bed temp is more a PSU limit than anything else.
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…
RE: 100°C bed temperature?
I don't wanna give you bad ideas, but what if you change the hardware instead of the software? Temperature is a resistance. If you use another thermistor or additional a resistor, you could easy simulate a temperature which is less than in real -> bed will heat and maybe get broken because it's not built for higher Temps. Only an idea. There is a reason they added that appendix :/
if resistance goes up on those thermistors adding a box with a switch to choose between X-Ohm resistance and no added resistance would not be hard to make.