ABS Prints Flawless, PETG is a Dumpster Fire
Filament - Overture PETG
Default PrusaSlicer settings for generic PETG except temp changed to 225C after temperature tower and pressure advance set to 0.05, up from 0.045.
New enclosed vcore 400. I printed off a few things ok in PETG initially. Then I switched to ESun ABS+ to print off some parts for inside the enclosure (led mounts and some other odds and ends). ESun ABS+ prints damn near flawlessly.
I switched back to PETG and was having some issues. I was trying to print off this snack holder that fits around a stanley cup for my girlfriend (picture shown). It didn't go well. I decided to retest the filament since this was a different color. I ran a temp tower and I thought I had a clogged nozzle after it stopped extruding completely in the middle of the print @ 220C. I cleared the nozzle and I had a pretty good idea about the temp so I moved on to do an EM test print. I absolutely couldn't get this to print at all. The video of the white filament is the PETG with an EM of 1. There's also pictures of more and less EM, but they all pretty much look the same so I don't think that's the issue.
Finally I switched back to the ABS to see if something was wrong with the printer itself and that's the video of the black filament printing. Again printing flawlessly.
Solution:Jump to solution
That was my initial thought, but this was actually completely due to the tension on the orbiter which is kinda blowing my mind. I don't understand exactly how that has so much effect on things.
20 Replies
Hi,
I'm having a bunch of problems printing PETG, but on your side it's looks like your nozzle temp is too low. PrusaSlicer have different premade filament profile for PETG. They are using 235° / 240°C as nozzle temp and 80°C as bed temp.
Hope it helps !
I don't know that the temp is the problem. I decided to move this filament over to my vminion and try running it there. I needed to do a better job on the minion anyway getting it dialed in. So I started over and did a PID tune on the bed and the extruder, dialed in the first layer squish with this filament at 245C, and now I'm trying to run Ellis's pressure advance tool (at 245C as well) and it is coming out like garbage still. The first layer going down slow looks good. As soon as it speeds up it gets messy.
Are you keeping the door off when you print? It might be getting to hot and the filament isn't feeding like it should.
I wasn't on the vcore but then I tried printing the same filament on my minion and was still having issues.
I generated a new pressure advance gcode starting at 0.07-0.15 and it started looking a lot better at higher PA. The numbers didn't print well but here's the result
What's your retraction set to? Length and speed. It looks like it has a bad time getting started after moving.
For those PA prints above, it was the default for Ellis' tool which is 0.5mm@35mm/s
I set the PA to 0.09 and tried running the extrusion multiplier cubes. It's better but still not great. These are using the default slicer settings of 1mm@40mm/s.
Do you have another roll of PETG? If ABS is printing great then it's not the printer. I always do flow rate, temp tower, then PA test in that order. Either way it shouldn't be that extreme. You could try drying the roll but I would just grab another fresh and see if this matches or changes what you're seeing.
I just tried a retraction tower and cancelled it early cause it looked fine 🤦♂️
I actually did switch rolls. The original pics were overture petg. Yesterday evening I got a roll of esun petg delivered and started using it thinking it was the roll itself. But that didn't make any difference either. I've tried printing it on my vcore and vminion with similar results. I'm stumped.
And btw I've been trying to follow a combination of the RatRig commisioning guide but more toward Ellis' Print Tuning Guide (which ratrig references a lot). So I've been doing PA -> EM -> Retraction -> Temp Tower in that order
So, your retraction tower looks good. Have you tried to just make a cube with a bone stock petg profile?
I'm in a dark place right now...
So I thought maybe I've got some kind of clog and decided to change nozzles and start all this calibration stuff over once again. Changed nozzles, went down a rabbit hole, now nothing is printing well. So right now where I'm at is new 0.4mm nozzle, trying to get the first layer squish down and my patches look like there's something dragging through the filament. I've changed nozzles again and I still get this same dragging look.
zooming in it looks like -0.01 or -0.02 would be good, but what the hell is causing the drag marks?
filament stuck to nozzle tip?
Solution
That was my initial thought, but this was actually completely due to the tension on the orbiter which is kinda blowing my mind. I don't understand exactly how that has so much effect on things.
Weird, I would never have guessed that
yeah I tried another set of patches and started turing the screw live and it completely went away...
I think the tension is the missing piece of me getting this all setup right. I'm going to play around with that some and see if that doesn't fix the rest of my issues. I'll mark this as solved and if I run into more issues, I'll start up a new thread. Thanks everyone that tried to help.