Shutdown / cooldown procedure after printing
Hello fellow printers,
it may be a newbie question:
I've only been using my MK3 for a few days now and I haven't found anything about this in the manual or on the forum.
What is your shutdown procedure after a print?
After a print, the extruder and bed temperature is still set to the required temperature for the material (e.g. extruder 240 Crad, bed 85 Crad). Until now I have unloaded the filament after printing and manually set the temperature values down in the menu. After the desired temperature has been reached I have switched off my printer.
I think it is not very good for the extruder parts if I switch off the printer immediately after a print with a residual temperature of 200 Crad.
What do you think?
RE: Shutdown / cooldown procedure after printing
I dont know what your start / end gcode is doing but a default Prusa Slicer profile for any of the Prusa printers should set the bed and extruder temperature to 0 at the end of a print.
For example the mk3s profile in 2.3.0 has the following in the end gcode
M221 S100 ; reset flow
M900 K0 ; reset LA
{if print_settings_id=~/.*(DETAIL @MK3|QUALITY @MK3|@0.25 nozzle MK3).*/}M907 E538 ; reset extruder motor current{endif}
M104 S0 ; turn off temperature
M140 S0 ; turn off heatbed
M107 ; turn off fan
{if max_layer_z < max_print_height}G1 Z{z_offset+min(max_layer_z+30, max_print_height)}{endif} ; Move print head up
G1 X0 Y200 F3000 ; home X axis
M84 ; disable motors
So when the print ends it starts cooling down automatically. If yours isn't doing that then you need to check what you actually have in your printers end gcode section (under Printer settings and only visible if in expert mode)
One thing to be aware of those is that the extruder fan will carry on blowing keeping the extruder cold end, well cold. You should not power off the machine until the extruder has cooled to below the glass transition tempt of your filament. So a good covers everything value is around 50 degrees.