How to prime the extruder before printing

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onki
Posts: 32
Joined: Sun Dec 30, 2018 9:08 pm

How to prime the extruder before printing

Post by onki » Wed Jan 02, 2019 8:56 pm

Hi,

there is just a little problem I am facing with my 3D prints at the moment.
When the extruder heats up there is a "worm" of filament flowing down the extruder.
This leads to no filament being applied to the plate for the first seconds.
Is there a procedure (Gcode) to be added to prime the extruder for a short moment after homing the axes and the go to a position with a pin or something similar to peel the excess filament from the nozzle?

Best regards
Onki

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_kaktus_
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Re: How to prime the extruder before printing

Post by _kaktus_ » Sat Jan 12, 2019 9:11 pm

Hello onki.
:mrgreen:

The phenomenon you write about is natural.
You can try to limit its occurrence.

In the additional "End code" commands you can add an instruction to withdraw the filament (retraction), so that it is executed
after each completed printout.
This is done in the slicer program.
This is first of all..

Secondly, you can add an instruction to the "Start code" script, which will give you a little bit of filament just before you start printing.
But then it is important to reset the filament counter.

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G92 E0
Will you manage to do it yourself now :?:
If you have any problems, ask. ;)
On the forum I help to use the rod, I don't give fish.
Geeetech Prusa I3 M201 Dual extruder Mixcolor 3D printer, bought 2017-12-19, already built, in the cognitive and improvement phase
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onki
Posts: 32
Joined: Sun Dec 30, 2018 9:08 pm

Re: How to prime the extruder before printing

Post by onki » Mon Jan 14, 2019 10:00 pm

Hi,

Thanks for your help.
I think I can handle that.

Best regards
Onki

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