PETG printing challenge with occasional blobs of material.
Hi again everyone,
After properly adjusting live Z using the square test pattern, I tried to print a larger and more complicated item with PETG.
I bought the Amazon Basics filament which has excellent reviews.
The problem I'm facing is that occasionally, the nozzle spits out a large blob of material, seemingly at random. Depending on where it happens, it may catch to the previous layer and fail it on the next pass.
Is that a common phenomenon?
Is that a calibration, hardware, or a filament issue?
Thanks in advance for your help!
Ami
Re: PETG printing challenge with occasional blobs of material.
Is that a common phenomenon?
Is that a calibration, hardware, or a filament issue?
Thanks in advance for your help!
Ami
amazon basics petg is pretty decent, I'm using it right now.
petg itself can be globby and sticky, but are you certain that clump is coming from inside the nozzle and not bits of filament that have gotten stuck to the outside of the nozzle?
Re: PETG printing challenge with occasional blobs of material.
Hi Curtis and thanks for your prompt reply.
I clean the nozzle carefully before the print, so it's not from the outside...
Ami
Re: PETG printing challenge with occasional blobs of material.
I clean the nozzle carefully before the print, so it's not from the outside...
Ami
raise the nozzle up and extrude a few hundred mm and watch what the extrusion looks like. steam? bubbles? see if you can recreate what happened.
Re: PETG printing challenge with occasional blobs of material.
Although probably not in your case (as I'm assuming it is a new role of filament) PETG can become hygroscopic enough to make life very difficult. Some brands of PETG seem to be more susceptible than others. You can think it's your settings causing blobs when in actual fact the filament has absorbed enough moisture to be the cause.
Re: PETG printing challenge with occasional blobs of material.
I clean the nozzle carefully before the print, so it's not from the outside...
Ami
raise the nozzle up and extrude a few hundred mm and watch what the extrusion looks like. steam? bubbles? see if you can recreate what happened.
Hi Curtis,
I tries your suggestion and indeed something is off, at some point it starts extruding 2 distinct threads, but quickly goes back to normal.
See
Re: PETG printing challenge with occasional blobs of material.
I clean the nozzle carefully before the print, so it's not from the outside...
Ami
raise the nozzle up and extrude a few hundred mm and watch what the extrusion looks like. steam? bubbles? see if you can recreate what happened.
Hi Curtis,
I tries your suggestion and indeed something is off, at some point it starts extruding 2 distinct threads, but quickly goes back to normal.
See
video unavailable?
Re: PETG printing challenge with occasional blobs of material.
video unavailable?
Oops... it was set to private, sorry about that, please try again.
In the meantime I managed to print with the same PETG filament, and while some fine 'threads' still made it where they shouldn't be, they didn't fail the print.
Ami