How do I set temperatures in fff?
Posted: Mon Nov 19, 2018 1:58 pm
by charlesdollins
I have a Prusa MK2. The default temperature for the extruder in the fff was 200 for PLA. I want to set it to 215. The printing I do requires a lot of filament retraction. This causes the extruder to run too cold. If I change the gcode to 215 in the M104 and M109 settings it works great. So I tried to change the extruder temperature to 215 in the fff and failed I now have the fff settings so screwed up that the bed won't heat. Are there any instructions anywhere on how to set the temperatures in fff?
Re: How do I set temperatures in fff?
Posted: Tue Nov 20, 2018 12:49 pm
by GLMiller
Open S3D
Click on "Edit process Settings" button to open "FFF Settings" window.
Under "Select Profile", select or create the profile for your printer.
Under the "Auto-Configure for Material" header, select/specify what filament you will be using. You can add/delete filament descriptions here. The default list is generic.
Press the "Temperature" tab located under the "Infill Percentage:" slider.
Click either the "Extruder 1" or "Heated Bed", depending on which temperature you want to change.
In the "Per-Layer Temperature Setpoints" area, double-click the temperature in the "Temperature" column.
Modify this number to the desired temperature, then press the <Enter> key on your keyboard.
Near the top of the "FFF Settings" window, click on the "Update Profile" button to save your modified
settings for this profile. Now every time you select this profile, the temperatures will be automatically set for the filament you have selected. Selecting the filament under "Auto-Configure for Material" (ABS,PLA,PETG,NYLON,etc) will auto-change the temperatures for that particular filament profile.
If you have modified the temps under TOOLS/FIRMWARE CONFIGURATION/FFF, then you need to restore to the original settings. Top to bottom, the settings should be...
M104 S$
M140 S$
M109 S$
M190 S$
M105
Re: How do I set temperatures in fff?
Posted: Tue Nov 20, 2018 1:22 pm
by wirlybird
Aside from the advice given I think I would find out what is going on with the temp. A lot of retraction should not be affecting the temp and if anything it would be causing heat creep which will lead to poor extrusion and clogs.
Is the retraction excessive?
Have you modified the cooling fan and or outlet?
What print speeds?
My MK2 has been printing steadily for over 2 years and nozzle temps have always been fine, almost no fluctuation.
Also run the PID tune on the extruder.