Weird issues after first layer

[tom4oc]

I have had may X1c (with AMS) for 10 days. Generally I am loving it (coming from an Ender3 v2). But I have been protoyping a ESP32 PIR case I designed and on every print I am getting a weird issue on every print of this case. The first layer seems fine then the next several seem off then it smooths out and the rest of the print looks good to me.

Sliced with defaults for
Bambu Labs Basic PLA
Stock nozzle and textured PEI Plate

Thank you everyone from any info on how to fix this.

Tommy

[JonRaymond]

This is a problem that has come up on the forum before. It is caused by the rounded section of the model causing a severe overhang at the start.

@JonRaymond

It’s important that you use a chamfer rather than a fillet. A fillet will create a severe overhang which will look ugly when printed. A chamfer is normally a straight 45 degree wall which the printer will handle very nicely.

If you still want a fillet on the bottom of your print you can start with a chamfer and then fillet the top edge of that chamfer. By doing it this way you avoid creating a bad overhang. The picture shows the difference. Notice the red highlighted overhang which will be difficult to print compared to the easy 45 degree angle of the chamfer+fillet combo.
Designing for 3D printing - 3DVerkstan Knowledge Base

[tom4oc]

Thank you so much. I didn’t think the angle of the fillet was such a big deal but seeing it in your post it makes more sense now.