For vision system the background need to be dark behind the part.
To solve this problem we are using black tissue circles fixed with glue behind the nozzle plate.

This is the nozzle without a tissue circle as delivered.


Here you can view the final assembly.
|addpics|iq-1-6835.jpg-invaddpicsinvv,iq-2-4f06.jpg-invaddpicsinvv|/addpics|

This preparation is only needed for V1 controller systems.

Our current V2 controller don't need!