buying advise 3D printer

[Artur5]

I don't know about that. Without knowing exactly how the ET8550 handles the tray, your idea may work or, on the contrary, because of the extra thickness the tray will jam inside the printer.

 

[pharmacist]

I cannot increase the design too much, because it must be considered as thick paper. I already increased the thickness slightly and it did not corrects the slight angled slope during printing.

 

[Epatcola]

Better now, but still that strange slight angle when printing:

I would be tempted to stick a sheet of paper on the bottom of the tray, possibly removing the bottom 0.3mm of the model first. I think the polished steel paper feed roller will grip paper better than PLA.

I would also look at where the pinch rollers for the paper feed roller bear on the tray. They are pivoted in pairs. I would hope they are symmetrical, if not that could skew the feed.

The paper feed guides ought to hold the tray straight while it is still in them. Are they getting pushed apart by the skewed feed or is all the skew happening after the tray has cleared them?

Is the tray thickness perfectly consistent side to side?