a) The shaft is rotated too far or the ratchet does not engage.
The return stop should always engage in the ratchet with the minimum
backlash , max. 1 mm.
This can be adjusted by shifting the pedestal and carrier. To do this
slacken the screw, slide the pedestal 1 mm forwards or backwards, retighten the screw and carry
out a binding test.
b)The wire slips through between the aperture and shaft.
The aperture must always lie on the shaft.
Slacken the screw,
firmly press down the aperture using the thumb and then tighten the screw.