Wall not straight / bulging on only one side of print
Hi everyone,I’m getting a strange defect where one wall of my print isn’t straight. The wall should be flat, but it bulges outward slightly in the middle. What’s odd is that it only happens on one side of the object the opposite wall prints perfectly straight.
- The 3D model itself has straight walls.
- The defect is consistent across prints (and printers I have to XL with 2 tools).
- It appears only on one side of the part.
- The rest of the print quality looks normal.
Printer / settings:
- Printer: XL 2T
- Material: Panchroma Charcoal Black
- Layer height: 0.2mm, 0.6 nozzle diameter
I have tryed, adding more walls, changing the orientation by 90 degrees, different infills, different PLA. I have also checked the belts' tension and lubricated I’ve attached a photo of the issue. Has anyone seen something like this before or know what might cause it? Thanks!
My first thought is a combination of geometry and cooling.
... changing the orientation by 90 degrees,
Try 45° to help split the cooling fan output - then also try plating it in the centre of the bed where both ends are partially protected from drafts.
If these don't help save your project as a .3mf file
Files > Save Project as
Zip the .3mf and post it here. It will contain both your part and your settings for us to diagnose.
Cheerio,
RE: Wall not straight / bulging on only one side of print
Hello Diem,
I have tried what you suggested, on one printer I just moved the print more towards the center and on the other I changed the orientation to 45°, and sadly I had the same or worse results (45° had the problem on both sides).
I am uploading the .3mf file. Looks like the issue starts happening at the big chamfer (but on 45° it is a different story, it also lifted from the plate).
The long wall is rather thin - going below 2mm is risky but the ribs and other features seem to have dispersed the perimeter thermal stresses quite well ... stay with an orientation that doesn't warp from the plate.
The thicker end walls do not have any surface features to break thermal contraction stress and the grid infill isn't helping ...
On those end walls can you either add a few vertical ribs or remove some vertical slots so the perimeter filament is not laid straight but jinks breaking the tension into shorter runs?
Replace the grid infill with cubic - or even honeycomb 'though that will shake the printer - if a little flexing is OK gyroid is worth trying too.
If you are using a 0.6mm nozzle I see no need for this part to use 0.2mm layers - 0.25 or 0.32 should be OK.
... and protect the printer from drafts - if you have one, partially close your enclosure but not all the way with PLA.
Cheerio,