Cold extrusion/not assigning heaters
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Hi,
I'm actually working on a project building a "liquid" 3D printer.
Therefore I'm using the Duet 2 Maestro running firmware version 3.01-RC4.
I have only one tool assigned which should pump the cold liquid.
I want to avoid to fiddle around with M302 command and unnecessary thermistors.
In an older thread I read that if there is no heater assigned cold extrusion is always possible (https://forum.duet3d.com/topic/6458/pure-cold-extrusion-literally/4).
Using the given firmware I'd therefore express the M563 command under tool definition skipping the heater assignment (H):
Therefore my M563 looks as follows:
M563 P0 S"Pump" D0 F0
Is this the correct expression, or do I need to additionally map heaters or thermistors under the heater definition.Thank you
Dominik -
No need to mess with thermistors to get cold extrusion working. All you need is
M302 P1in config.g. -
Thank you for your prompt reply.
I have tested it but receive an error message as no Thermistor is attached.
I have alternatively tested the M563 command as mentioned above and it works now by not assigning an heater to the tool.
Thank you anyway! -
@FoxLab Bit late to this, but yes, you can define a tool that is just an extruder, as you've already discovered. Glad you got it sorted!
Ian
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Sorry to lead you astray. I learned something new today. I'll update the cold extrudes wiki entry to mention the thermistor requirement and also point out the work around of using a tool without a heater assigned.
