CS-A: Screwdriver is not going forward after activating spoke guide sensor

If the screwdriver stays in the back position and is not going forward to screw the nipple on the spoke, check all sensors which are responsible for the process:

Blue: Revolution counter should flicker when motor turns the screwdriver

Red: Needle sensor should be off 

Sensor should only be active by pressing the spoke guide

If one of the sensors is not working as it should, please adjust accordingly.