The Sintratec Kit prints with a layer height of 100 to 150 microns. Note that due to the nature of laser sintering, the apparent surface finish is much better than FDM prints.
The Pattern is just for rough calibration. You can tweak up 5% in the Software. It’s located in the 4th tab under Calibrate.
The laser glass is probably dirty. Install a new laser glass.
The print bed is too hot, decrease the print bed temperature by 1 degree C.
The phenomenon is called “curling” and results in a print failure, it happens due to cold spots on your print bed.
Take the following steps:
- first make sure you are preheating the printer for the full standard preheating time
- increase the print bed temperature by 1 degree C (or more, if necessary)
- decrease the laser scan speed by 100-200 mm/s if necessary
Your laser scan speed is to fast and/or the temperature of your print bed is too low.