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Purge/Prime line issue  

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Georg
(@georg-4)
Estimable Member
Purge/Prime line issue

I have sometimes an issue with the purge/prime line. Sometimes the prime material is not purged down outside the print plate, but in a spot on the edge of the plate. When the head is doing the short prime line to the right, the purged material from before stucks to the head and destroys the print. Maybe one mm more outside the plate would fix this issue. Does anyone else have this issue?

Posted : 11/12/2023 1:01 pm
Agkirk
(@agkirk)
Estimable Member
RE: Purge/Prime line issue

When this issue happened to me I found that I had not positioned the build plate correctly. It needed to be pushed back squarely against the back post. 

Posted : 12/12/2023 12:57 pm
Bruce and Georg liked
Georg
(@georg-4)
Estimable Member
Topic starter answered:
RE: Purge/Prime line issue

You are right. But i had this also when i did not changed the build plate. I had this issue at my current print. I am going to monitor this in the next days.

Posted : 12/12/2023 1:00 pm
Nikhil S.
(@nikhil-s)
Trusted Member
RE: Purge/Prime line issue

I would suggest heating your nozzles up and manually grabbing and undocking each toolhead, and giving it a hell of a scrub with a brass brush.

When this happens to me, it's because the initial extrusion is sticking to something else on the nozzle. It can be a tiny particle of filament goo left behind that can cause this.  After a good brushing, they should all extrude straight down.

Brand new to 3D printing and my 5-tool XL is my first 3D Printer! I have done massive amounts of research though, so I'm not starting completely from square one....

Posted : 15/01/2024 8:31 pm
Georg liked
Marc
 Marc
(@marc-9)
Trusted Member
RE: Purge/Prime line issue

Instead of a brass brush I use a three times folded (six layers) kitchen towel / paper towel to clean the nozzle. Less mechanical stress on the nozzle/hotend but also higher risk to burn yourself. 🤣 
I'm cleaning the nozzles like that since the MK2. Brass brush is only used when I can't get rid of the gunk using the towel.

Posted : 17/01/2024 11:10 am
Nikhil S.
(@nikhil-s)
Trusted Member
RE: Purge/Prime line issue
Posted by: @marc-9

Instead of a brass brush I use a three times folded (six layers) kitchen towel / paper towel to clean the nozzle. Less mechanical stress on the nozzle/hotend but also higher risk to burn yourself. 🤣 
I'm cleaning the nozzles like that since the MK2. Brass brush is only used when I can't get rid of the gunk using the towel.

I tried this, but paper towel seems to encourage the goo to move around on the printhead instead of coming off.  Maybe my technique sucks though. I'm admittedly freshly new to this.

Brand new to 3D printing and my 5-tool XL is my first 3D Printer! I have done massive amounts of research though, so I'm not starting completely from square one....

Posted : 19/01/2024 7:59 pm
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