Bed Temperature Limit?  

RE: Bed Temperature Limit?

Posted by: @dohzer

Does anyone know physical temperature limit of a Prusa buildplate?

I just finished my heated chamber which I'm using to print at 50C currently, but working my way up to 100C. I've upgraded to a 60W cartridge, 450C thermistor, and I've raised the bed temp limits to 160C. So far in my testing, with an ambient temp of 55C I've been able to maintain 150C on the bed.

I may end up building a standalone high heat printer for this purpose, but I'm just curious if anyone here has done a high heat setup with a prusa?

Thanks

Hello and welcome to the Prusaforum!

If you want to build a high temperature printer, I would rather recommend a replica of this model. The Prusa is not suitable for this purpose. The original Prusa power supply alone would be much too weak and the plastic elements would be stressed too much.
To increase the power of the bed heater, you have to increase the voltage to e.g. 30V (additional power supply). 150 degrees C. is the absolute limit. There is also the risk that the glued magnets loosen, because they are not designed for such high temperatures and lose their magnetism.

To increase the nozzle temperature you can either install another hotend, like a Mosquito (or similar) or a PT100 upgrade with copper heater block and titanium heatbreak.

What and which filament do you want to print with it?

wbr,

Karl

RE: Bed Temperature Limit?

@karl-herbert

Mostly my plan is to print PC, but I'd like to experiment with PSU.

Thanks for the suggestion on the printer. Although I'll probably modify a two trees saphire if I end up building a dedicated high heat printer.

That's a good point about the glue for the magnets. I was also wondering how well the pinda sensor would work with the additional loss of magnetism at higher temps. Not sure how well pei sheets handle higher temps although from my research 160 should be under the usable temp limits.

I have a copper heatblock
titanium heatbreak
CF PA6 plastic parts (soon to be replaced with CF PC)
PT-100 sensor
60W heater cartridge
PSU can already maintain 150C on the bed at 24V (I'm guessing with an ambient of 100C it would have no problem at reaching 160)
Electronics are isolated to outside the chamber
Potential Future plans: Watercooled steppers & maybe Aqua Titan

(build chamber)

RE: Bed Temperature Limit?

Just a bump on this older thread.  I am able to print Prusa PC just fine in a ~55C+ chamber that my Voron 2.4 provides, which uses only the bed heater as a heat source.  Prusa's PC actually seems to be easier to print than most ABS / ASA materials.

I'm not sure you need anything more than a stock prusa, and a good enclosure with good insulation to get 55C.