Simplify3D User Forum

Hey Guys,

I been printing with PETG for about 20 hours now and gotta say that I love it. It is very strong/durable, doenst warp, lift, or crack like ABS and isnt as brittle as PLA. It also has a higher density, so objects have that heavier quality feel to them. It took a but to dial in the print temp and retraction settings, get some strings but seems to be just one minor disadvantage.

I do have one problem, well sort of a problem, that I would like help diagnosing. Attached are 2 photos showing a 12 inch object that I printed standing up, has no infill, just 4 perimeters. You can see spots in the layers where the line makes an indent looking strech. Whether it underextruded there or it did something else, I would like to get this fixed.

I'd suggest switching on "Coasting" and or "Wiping." Coasting stretches the last bit of filament at the end of a perimeter over the designated distance. Wiping will attempt to wipe excess filament that's oozing out at the end of your perimeter onto a non exterior surface.

I have wipe on, set at 1.5mm. Might be to much or to little? Maybe play with coast instead or both.?

are you using retract on layer change?

Yes, raised .2mm

Retract while wiping?

Yup, I have that option checked as well.

Also, just to be on the same page. I am using a .8 nozzle, .9 line width, .4 layer res, and printing at 30mm/s

yes #1 turn off the random start points and turn on choose start point closest to location. that will clean up the model and put them in a row so there is a seam. the petg shows these starts and stops worse because its translucent and you r looking into the plastic a little. once you collect them into a seam then you can see how you need to adjust your ooze control settings.

I can't exactly see if they are a blob or inclusion - if its a blob, add some coast, .2-.5mm, if its an inclusion, do a longer wipe(5-10x the nozzle diameter).

Make sure your extrusion width is calibrated carefully as well.