Problems and Guidance?
Hello,
I have noticed quite a few problems with the MK3. Rather than complain I was wondering if someone who works at Prusa preferably in the print factory has any tips on how they keep things running smoothly.
I noticed that when printing with PETG (Prusa Orange) it likes to gum up and stick to the outside of the nozzle. How do you keep your nozzles clean? Or prevent it from sticking in the first place?
How do you print so many successful PETG parts, do you have sample settings or profiles?
Do you use the PEI Spring steel sheet? If so how do you prevent it from wear or damage, I have noticed the coating has cracked and starting coming off from using PETG only several times.
I have had problems getting consistent layers without having to adjust the live Z between prints. Seems that a cold start vs warm has different settings. So now I have two goto settings depending if it his warmed up or not. But that requires me to wait for the print to start.
Do you see this in the factory? Do you have any tips on adjusting the live z?
Thanks for your time.
Anyone else that has seen or fixed these problems please feel free to chip in.
Thanks,
Mike
Re: Problems and Guidance?
PET collects on the nozzle, if the nozzle is ploughing through filament,
this could be caused by too low a live Z adjustment, or over extrusion. or both
PETG sticks to PEI quite firmly use windex, forehead oil, talcum powder or gluestick and reduced squish to reduce the tenacity of the bond to the PEI
remove the parts gently from the build plate
Prusa use 3mm filament, in the print farm, and textured pei sheets,
so theit print profile will not be much use to us.
the pinda probe is being addressed. doyou have the latest firmware and driver package?
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
Re: Problems and Guidance?
I think your PETG nozzle problem comes from the first layer.
If you squish it down too much there is a bit of material getting dragged around on the nozzle. This you take along as you go higher and higher in your model.
This will als solve your adhesion issue. A bit more clearance for PETG and it will stick less to the build plate.
@joan, do you mean Prusa has custom printers in their farm? All their printers are built for 1.75mm filament.
Re: Problems and Guidance?
PET collects on the nozzle, if the nozzle is ploughing through filament,
this could be caused by too low a live Z adjustment, or over extrusion. or both
PETG sticks to PEI quite firmly use windex, forehead oil, talcum powder or gluestick and reduced squish to reduce the tenacity of the bond to the PEI
remove the parts gently from the build plate
Prusa use 3mm filament, in the print farm, and textured pei sheets,
so theit print profile will not be much use to us.
the pinda probe is being addressed. doyou have the latest firmware and driver package?
regards Joan
Thanks, I am running the 3.1.2 firmware from march 8th? it fixed my layer shifting issue which was really bad.
Re: Problems and Guidance?
Hi Mike,
the latest firmware is 3.1.3
you may benefit from updating again...
no point chasing issues that may have been corrected already...
Hi Joris,
I believe that Prusa do indeed use 3mm filament, so their build is slightly different to ours,
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
Re: Problems and Guidance?
Sorry I am running 3.1.3 not 3.1.2.
In regards to squishing of PETG vs PLA. What should I be aiming for. I have the following examples. The purple color is PLA and I ended up going for the mirror finish which is live z of -896. The orange is PETG which I printed at -800 and -850
https://photos.app.goo.gl/bLwU7G0aMFFgDqLf2 This is -800mm
https://photos.app.goo.gl/krJuksw0QqI5xuE02 This is -850mm
https://photos.app.goo.gl/xyvrf9DI7Rj21Kpx2 This is various PLA vs PETG -800