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woogerboy21
(@woogerboy21)
Active Member
Purge on print start

Hello!  I was curious if there is a way to configure a printer profile to purge an amount of filament in the purge tower at the beginning of the print before actually printing the sliced part?  I have a multiple extruder single hotend printer and when starting new prints some of the last color used is still hanging out in the hotend that needs purged before printing.

Thanks

Posted : 14/01/2022 2:26 am
JoanTabb
(@joantabb)
Moderator
RE: Purge on print start

One simple way is to print a larger number of Skirt lines... 
then the imperfect filament would be printed into the skirt before starting the model!

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 14/01/2022 4:30 am
woogerboy21
(@woogerboy21)
Active Member
Topic starter answered:
RE: Purge on print start

Hmm... not a bad idea.  I should measure the amount of filament it takes to figure out how large a brim that might be.  It's definitely larger than the default purge line.

Posted : 14/01/2022 6:07 am
woogerboy21
(@woogerboy21)
Active Member
Topic starter answered:
RE: Purge on print start

 

Posted by: @joantabb

One simple way is to print a larger number of Skirt lines... 
then the imperfect filament would be printed into the skirt before starting the model!

regards Joan

This seems to be a pretty good solution, thanks for the recommendation.  The only drawback is the size of the part your printing.  The smaller it gets the more lines are needed so I cant just set it and forget it :/

Posted : 21/01/2022 2:43 am
Neophyl
(@neophyl)
Famed Member
RE: Purge on print start

Yes you can.  When in expert mode there is a red setting available called "Minimal filament extrusion length:"  As long as there is at least 1 loops defined the setting is not greyed out.  This makes the skirt use that much mm of filament.  Note skirt and NOT brim.  There is a difference.

Posted : 21/01/2022 7:46 am
woogerboy21
(@woogerboy21)
Active Member
Topic starter answered:
RE: Purge on print start

Oh... ill have to try this as well...

Posted : 21/01/2022 2:07 pm
nvcheeko
(@nvcheeko)
New Member
RE: Purge on print start

Just do Purge Line at start of GCode 

Posted : 25/01/2022 9:10 am
XemereSmoe
(@xemeresmoe)
New Member
RE: Purge on print start

Yes, it's the good way!

Posted : 27/01/2022 9:25 am
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