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Patrik Rosén
(@patrik-rosen)
Reputable Member
Max heatbed temperature

Hi!

Testing some PETG specified to be printed at a 70-90 degrees build plate, I set the build plate temp to 100 degrees, but while printing it wanders between 75-78 / 100 degrees, it never reaches 100 degrees apparently, is this a physical limitation? The Watt isn't enough to reach 100 degrees? If I would put it inside an enclosure it would reach higher temperatures? Or is it a safety limitation maybe?

Best Regards Patrik

Me on 3dhubs!
Posted : 06/07/2016 3:40 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Max heatbed temperature

Patrik

Do you have the part fan turned on by any chance? That will kill the heated bed temps.

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…

Posted : 06/07/2016 4:49 pm
Patrik Rosén
(@patrik-rosen)
Reputable Member
Topic starter answered:
Re: Max heatbed temperature

The fan starts at the second layer, but it doesn't reach the temperature while preheating either.

Me on 3dhubs!
Posted : 06/07/2016 10:44 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Max heatbed temperature

In that case, you may have a high-resistance joint at the connector (heated bed on RAMBo).

Unplug it and replug a few times; ensure it is properly seated in the socket.

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…

Posted : 06/07/2016 10:53 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Max heatbed temperature

Patrik

Just checked my bed between prints. Set to 100 degrees, it took 6.5 minutes to get there and was very stable at that temperature.

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…

Posted : 07/07/2016 12:51 pm
Josef Průša
(@josef-prusa)
Member Admin
Re: Max heatbed temperature

With the PET, the fan is playing with temps, there is very little insulation on top of the heating element. This allows us to have such a big bed and passive PSU. It can reach upto 120°C.

Founder and owner / Majitel a zakladatel
Posted : 07/07/2016 1:07 pm
Patrik Rosén
(@patrik-rosen)
Reputable Member
Topic starter answered:
Re: Max heatbed temperature

I just printed a new Raspberry Pi bed mount in PETG from Maker Geeks, since my first one in PLA melted when I started to bump up the bed temperature.

I printed at 80 degrees now, and it reached that + was stable, I also printed this one without the fan turned on and the layer bonding is ALOT better, actually this part feels REALLY solid. Some flex but strong as hell.

Could it have been that my nozzle fan was turned on during the first attempt? I'll try 100 degrees again.

Me on 3dhubs!
Posted : 07/07/2016 1:58 pm
pbnj
 pbnj
(@pbnj)
Trusted Member
Re: Max heatbed temperature

We print some with PET and use a bed setting of 90 degrees, the printer room is keep at 72F all the time. We have found that rapid movement of the bed will bring the Temp down to about 86 degrees. Placing cardboard on three sides has help to keep the temp at 88 or 89. But the with or without the cardboard did not have any effect on the print so we no longer use the cardboard just let the bed temp drop.

If you are having a problem and need a bed temp of 100 then a box is the way to go.

Posted : 09/07/2016 4:21 am
michael.f3
(@michael-f3)
Eminent Member
Re: Max heatbed temperature

We print some with PET and use a bed setting of 90 degrees, the printer room is keep at 72F all the time. We have found that rapid movement of the bed will bring the Temp down to about 86 degrees. Placing cardboard on three sides has help to keep the temp at 88 or 89. But the with or without the cardboard did not have any effect on the print so we no longer use the cardboard just let the bed temp drop.

If you are having a problem and need a bed temp of 100 then a box is the way to go.

Are you achieving this with an extra fan/therm? If so are you pulling it from the rambo?

I've just boxed mine up and I'm not getting hairy/sagging prints due to the rising temperature (I print mainly PETG type filaments), particularly on the back side of prints.

Posted : 10/07/2016 5:15 pm
christophe.p
(@christophe-p)
Member Moderator
Re: Max heatbed temperature

Since I'm using mostly 110 °C as first layer temperature for ABS, it's my reference time. I didn't try to go higher (no need for that yet, still plan to try polycarbonate that could need it).

Usually I reach 110 °C it in ~13 minutes, but having added a cork tile under the bed I gained approximatively 1 minute, the last degrees seems faster to reach. Once reached, the temperature is pretty stable during the print, as soon as there is no strong fan activities.

I'm like Jon Snow, I know nothing.

Posted : 10/07/2016 5:30 pm
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