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PETG Inconsistent Shine On MK4 from a Mk3s+  

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Mordtih
(@mordtih)
Member
PETG Inconsistent Shine On MK4 from a Mk3s+

Hi all, I recently upgraded my Mk3s+ to a MK4PETG Shine issues. On the same table in the same room, printing the same file, with the same filament, I have two Mk4s and the newly upgraded Mk4. The newly upgraded Mk4 seems to behaving issues with temperature regulation. If you notice there are lines of matte black and glossy black on the two units to the right. The unit on the right is printed on one of the MK4. I have them all on Prusa Connect and I can't observe any temperature fluctuations. The room is not drafty, and the humidity is around 20%. Is my power supply on the way out? Should I re temperature calibrate all the printers at the same time? Thank you in advance.

 

Posted : 06/02/2024 10:43 am
Chris Hill
(@chris-hill)
Estimable Member
RE: PETG Inconsistent Shine On MK4 from a Mk3s+

Are the nozzles the same on all three printers?  I noticed early on that PETG prints on my MK4 had a matt finish, compared to the shiny MK3S+ prints, and I initially put it down to the increased speed of printing with IS.  I found that increasing the nozzle temperature by 5 or 10 degrees restored the shine.  I've since read that my steel Nozzle X might need an extra 5 degrees because of the different thermal properties compared to brass, so maybe the matt finish had nothing to do with the printing speed and was possibly due to the steel nozzle.

So, if your nozzles aren't all the same, maybe you need to increase the nozzle temps a bit. 

Posted : 07/02/2024 4:58 pm
Mordtih
(@mordtih)
Member
Topic starter answered:
RE: PETG Inconsistent Shine On MK4 from a Mk3s+

Thanks, they are all the same nozzles. .4 brass that the printers and kit ship with. 

I did try increasing the temps before posting but the same variations appear. 

It's definitely temperature related, but again nothing on my end is showing there's any fluctuations. Even the on screen nozzle temp stays consistent. 

 

Very strange. 

Posted : 07/02/2024 5:04 pm
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