Intermittent extrusion

Hi all anyone know what this could be? Seems to be a regular pattern, no issue with PLA, This is PETG. Fresh out of he dehydrater

brilliant-limeOP•7/5/23, 4:14 PM

235/80, 0.4mm nozzle, 0.2mm layer height, dragon hotend, sherpa mini, quite slow speeds, just the standard PETG profile in SS

Mr. Hye•7/6/23, 11:27 PM

I am having similar issues, but only with PLA.
Here is what I have done that helps...But still not resolved.
Try moving your nozzle to center of build platform.
Heat nozzle up to 220.
In RatOS, go down to manual extrusion, set the extrusion speed to 7mms(or whatever your max extrude speed is).
Set it to extrude 150 or 200mm of material, something to give you enough time to adjust stuff as it extrudes.
Now watch and listen. If you hear it skipping, or see the filament coming out not uniform size, try adjusting the temp up until it comes out smooth.
Also try adjusting the tension spring for your extruder feeder. Try backing it all the way off till it stops extruding, then slowly tightening it until it begins feeding smoothly. Then give it just a bit more tension than that.
For me, at 7mms feed rate, I have to be at around 248 or so...which seems really high to me for PLA. But it does greatly reduce the cracks I have.
I am still working out whats the issue.
I am starting to think it's an issue with my filament moving freely enough through my PTFE tube.