Max heatbed temperature  

Re: Max heatbed temperature

Patrik

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

Peter

Re: Max heatbed temperature

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

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

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

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.

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.

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.

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.

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.