Parts are bending upwards at edges

Vertex 3D Printer Vertex - Issues while printing
1

Have some problems with bending edges. Only the last 2-3mm of edges bending upwards of about 1.5mm. The longer the part, the stronger the effect.
Using Kapton foil, 50°C bed temp, 191°C extruder temp, and adjusted 0.25mm nozzle/bed spacing.
Uneveness of bed was measured with 0 to -0.08mm in printing range.
Could I adjust some parameters to avoid this?
Thanks, Thomas

2

This sounds like you are working with the K8200.
You didn’t say what you were printing with PLA or ABS.

Try setting the bed temp to 60C.
I have changed the settings in slicer so my bed will go to 55C for the first layer then 70C for all other layers.

You could try printing with a brim.

3

Yes, sorry, took the wrong board…I indeed use the K8200…and PLA

Will try a slightly higher bed temp for 1st and following layers.

Thanks for reply.

4

If you are printing on glass you might try putting a light coat of hair spray on it as well.