Simplify3D User Forum

Just a simple bracket with the default F410 PLA settings. The only thing I changed was the outer layers from 3 to 4 so as to not have the printer in-fill (make solid) the circle parts. This is one of the better ones. Sometimes there's entire parts/sections missing! I'm left wondering, is it really going to try and print this dog's breakfast or is it just a rendering error? Cross my fingers and hit the print button anyway?

The last pic (the ugliest one) is using the S3D default F400 profile.

Also, it prints the outer layers and the circle parts first then repositions the head to start the infill by dragging the head straight across the print bed and over the parts already printed without adjusting z. I cringe every time I hear the print head banging across the already printed stuff. Wouldn't a simpler and more efficient solution be to start the next layer at the closest point to the end of the last layer?

I don't recall having these problems with V4. Anyone else having these issues?

Can you post the factory file? It's hard to give suggestions just based on the screenshots.

STL file:
https://drive.google.com/file/d/12gepxe ... sp=sharing

Factory file (default settings):
https://drive.google.com/file/d/1LyA4HX ... sp=sharing

FYI that STL was made with Rhino7 and I know rhino makes garbage meshes, so I double check by making the same in Alibre but I get the same results.

It looks like this is actually an issue with the profile. The 2nd line in the profile says "G90 ; use absolute coordinates". For most machines, G90 sets BOTH the movements and extrusion systems to absolute mode (reference: https://marlinfw.org/docs/gcode/G090.html). However, the S3D profile is set to use relative extrusion distances on the Output tab. So essentially the starting script is trying to use absolute extrusion, but S3D is writing relative extrusions.

The solution is to either remove that G90 line in the starting script or to disable relative extrusions on the Output tab. After making either of those changes the preview looks correct.

Ok, looks better but is that a F410 thing or a S3D thing? Is it actually affecting the print or is it just a rendering error? The S3D supplied default F400 profile has that same setting turned on as well. Should that setting always be off?

The reason I'm asking is because this printer is causing me headaches lately so I'm trying to narrow things down. The Fusion supplied Reactor software is garbage, I've never been able to get a decent print using it, so I can't really compare Reactor to S3D to see if it's software causing the trouble. So, I'm still left with the question.. Is it the machine or the software?

Third possibility (most likely) is the user but let's leave that as a last resort.

Update:

Nothing comes out of the nozzle unless that's enabled.

I don't see any issues with what S3D is displaying, so I would say it's an issue with the starting script in that profile. I linked to the firmware documentation above which explains how much firmwares handle that command.

I mentioned 2 ways to solve the issue (disable relative extrusion OR remove the G90 in the starting script). Did you try both of them?

By the way, I had this same problem. I'm coming from 4.1.2 to 5.1. The slice preview in version 4.1.2 looked flawless but the preview in version 5.1 was missing lots of layer lines. Simply turning off "Use relative extrusion distances" in the Output tab did the trick...so thanks for that. In version 4 "Use relative extrusion distances" was always checked for me. Not sure I really understand what it's supposed to do. Whether on or off it doesn't seem to impact anything I print.