Indentation/odd formation on a flat surface issue

[wirlybird]

Here is a new issue. The item in the pic where it is circled is supposed to be flat. What you see is an indentation that has some how formed. It should not be there but even stranger is the second part printing next to it is doing the same thing! It is like part of the opening shifted way over and left a shadow.

I have never printed two at once so maybe that is it and it didn't slice ok.

QIDI machine, S3D pretty default settings for PLA.

Thanks for any thoughts.

[CompoundCarl]

Probably just residue left on the bed. That's what usually causes this problem for me at least

[wirlybird]

Probably just residue left on the bed. That's what usually causes this problem for me at least

I thought so also but this was a fresh just coated glass.

If you look toward the bottom of the circled area you can see a line starting at the left edge of the print and going to the right then it curves up where it defines the recessed area. The interesting thing is that this shape is exactly the same as the right hand side of the cutout in the middle of the print. This pattern is repeated on the other piece printing next to it (same part). It's like it got a ghost outline from the opening in the middle that shifted on the print.

I have printed several of these and it has not done this but I was printing one at a time.
I am going to try to print a single again later to see what happens.

The only things that change hardware wise are new extruders and Y axis belt tightening.

[asemeco]

What is the distance between the two shapes? Is it the same as the distance between the two extruders? This happens when the inactive extruder is a little lower than the active one. It drags over the print, lifting the extruder assembly outside the recessed area, but not inside. That creates a second, shifted recessed area.