intermittent overextrusion

[Nepherael]

You da man. I really appreciate that. In doing this I've learned quite a bit and I've got this thing printing like a dream but there's something up here that I'm either not understanding or that S3D is computing weird because of the nature of the thin wall section on this.

Let me know what happens.

There's a solid section at the bottom. About 19 layers. The issue creeps up as soon as it passes this section and has just the thin areas to worry about

I've been running ABS out of my left extruder so all these settings are for that. If that is an issue give me a heads up and I can switch it to right extruder and export again. It wouldn't let me upload an x3g file so I zipped the gcode and x3g together

Cart Tray Slide.zip

[Nepherael]

I edited that post a bunch of times. At first I had a 1 shell version in there. I had tried that before but I had a new way I was going to do a 1 shell version so I gave you the standard 2 shell version that has been giving me issues nonstop. My next thing to try is 1 shell (then it won't need to go do a small square on the left and right because it will only do 1 outline) and a much higher infill percentage and see how it goes.

Just to add some more. In the preview for the print if I show it by line. After printing each square in the shells (when it moves left and right and lays down that goop) as I'm going forward line by line there are 5 moves in between the squares where on the S3D preview the toolhead doesn't move at all. So I click forward 5 times and it just shows it sitting over one side of the model. I'm assuming this is when it is actually laying down this goop. Maybe in a wipe or ooze control maneuver (edit: it's a retraction. When I turn retraction off it doesn't sit there for 5 clicks like that. So I guess this has come full circle. BUT I have no stringing so I wouldn't know what to do about it)

[Nepherael]

Rock on man. Thanks. This has been one heck of a learning experience. I've invested a lot of time into these specific parts but I know I'll be able to use this knowledge down the road so I'm not as frustrated as I was. I'm glad I've continually narrowed the issue down. I want it solved though.

So now that I printed those two with 1 shell and 50% infill they look good. Little bit of ringing. Maybe retraction, maybe speed issue but that shows me the biggest issue is the way the gap fill that S3D auto generates is laid down. I'm going to test back to 2 shells with the gap fill and mess with those settings a bit

[Nepherael]

Yeah I'll take some pics and post.

Ok so most recent setting change is that the checkbox for "force retraction on layer change" was checked and I unchecked it. Now I'm only showing the issue about every 5 layers or so. So now maybe I'll play some more with retraction.

Pics incoming

Edit: Not bad. My single walled one with no gap fill looks close to that. That's bringing me back to these darn retraction settings again /sigh

[Nepherael]

First pix shows most recent tries oldest to newest. They do get better. Second pic shows what I'm printing right now without forcing retraction every layer. It still has issues. Retraction setting is 1.5mm@25mm/s

What are your retraction settings?

[Nepherael]

Better yet if you printed that with S3D can you export the profile and send it to me?

[Nepherael]

I haven't even tried that yet. I'll give it a shot if it's gonna put out quality stuff like that!

[Nepherael]

Sure thing. Thanks again. I'm so close to get this nailed down I can taste it

[Nepherael]

I did it! It all came down to seriously tailoring my retraction and ooze settings. Any issues with the surface seen in the photo aren't even felt. It's smooth all the way around. To be honest this got way too specific for me right off the bat. I wish I had attacked something like this in stages as opposed to all at once but I'm starting to feel like I understand retraction and ooze settings within S3D on a level that I would never have guessed this early on.

I'm working on some new product designs and most of my products will be small so getting these settings tailored as well as understanding them is really gratifying

[Nepherael]

That is the weirdest thing I have seen. But, with the issues I had with mine, I wouldn't put it past the wiring that goes down to the carriage. Mine was rubbing at only certain parts/stretches of the print causing the temp reading to swing all over the place. Look carefully at the top-back screw that has the silver washer on it, that the cables are zip tied too. Check the wiring around it. Cut the zip tie off to relax the wiring and try printing that again.

Interesting thought. Thank you for the idea. I hadn't considered a physical solution to the problem. I'll take a look at the wiring and how it's sitting shortly