Forum - CNC'd focus slider did not come with screw holes for CMOS PCB...

Hi Masato,

I recently changed the design of the CMOS PCB and focus slider so that the PCB can be mounted with 3 screws. I think you must have ordered the CNC'd parts before I made the change but still got the newer version of the PCBs. These different versions are still fully compatible so no worries. You have 4 ways to mount the PCB to the focus slider:

1. Apply a thin layer of epoxy or hot glue (don't use super glue due to out gassing) on the PCB around the edge of the imaging sensor and then mount to the focus slider.
2. Place the PCB onto the focus slider, place screws through the 3 mounting holes on the PCB, then add some epoxy, hot glue, or optical glue between the screws and the side of the focus slider. This is my preferred method.
3. Place the PCB onto the focus slider then apply a thin layer of hot glue or epoxy around the edge where the PCB meets the focus slider. This is how some people in our lab use to mount the PCB.
4. If you want to be able to easily take the CMOS PCB on and off you can wrap a couple small rubber bands around the PCB and edge of the focus slider.

Make sure to clean the glass of the imaging sensor before mounting it in the focus slider since it will be difficult to clean once mounted.