Use Heated Bed as Filament Dryer

Rossini

Hi,

i thought, maybe i can use my 3D Printer with the Heated Bed as a filament dryer. In our 3D Printers we already have a controllable heat source, why use a extra box or so....
Only thing is: how can i control how long the Heated Bed heats?

Is G4 the right G-Code?

e.g.:
M140 S55 //Set Bed to 55 °C
G4 S21600 // Wait 6 hours
M140 S0 //Turn off

Is this a possible solution? Can the G4 Code wait that long?

Repetier

I theory yes. Problem might be if you have configured firmware to shut down after a time being idle.

And you need some box around filament so heat stays inside but also have some air holes so humidity can escape.

Rossini

Is there a g-code for disabling/setting the shut down timer? is M85 the correct one?

Repetier

Yes, M85 S0 would disable the inactivity timer. And checking the code that is in deed the one disabling all heaters.

few

I have used heated beds on CR-10s, X1, mk3s printers as a filament dryer. Mk3s has a timeout, doesn't work well. Then I bought a food dehydrator, that works much better.