Spool join results in bad layer
I have been using spool join for awhile without issues and it has worked well up until now. This feature is important because my main application is a 600g print which leaves a third of a roll unused.
Recently I have been getting a rough layer where the spool join occurs. Filament appears to be oozing out of the sides at the join location.
The first layer of the join appears to have zero offset from the previous layer but then prints normal on layers after that.
The issue has come up after I changed nozzle 0 and did a recalibration, and rechecked belt tension. However all of these things appear to be set correctly as all non joined prints come out fine.
The print that requires the spool join only uses tools 2-5. The join is on tools 4 and 5.
I have ruled out calibration because multi colored prints with tools 4 and 5 come out fine.
Are there any suggestions for things to try?
Since this began after a calibration I would guess that is the first place to look. My theory is maybe the updated z offsets do not get applied correctly for the spool join.
I am tempted to try setting the offsets for tool 4 to zero and set the other tools relative to that (I am not using tool 1).
I printed a homing tower to confirm belt tension, and it came out perfect.
I am on firmware 6.2.0 v2
RE: Spool join results in bad layer
You need to recalibrate the nozzle offsets and make sure your nozzles are completely clean. They can have absolutely no plastic residue on them or else the offsets will be incorrect.
Unload the filament from each head and then heat to 260 and clean with a brass brush. If some residue remains from a stubborn material like PCCF you can go hotter. You may have to resort to carefully using some needle nose pliers and gently scraping the plastic off after the nozzle cools.
Regular PETG, ASA, ABS, PLA ect will come off easy just be heating and brushing.
RE: Spool join results in bad layer
Thank you for the response. That was my first thought, so I went through re calibration and manual calibration, and I ensured that the nozzles are clean during homing. If the nozzle offset were wrong, then multi color prints would see this issue, but this does not occur with multi color prints. It only occurs when doing a spool join.