Usually when this happens it’s because there is a honeycomb or other patterned surface in the camera’s field of view that is “confusing” the code that attempts to identify the dot pattern. Try covering your laser’s workspace with cardboard or another patternless material — it’s also possible to perform the calibration process entirely outside of your laser, the camera only needs to be in position for the alignment step.
Here are some additional tips on the lens calibration (and alignment) process:
