I have a useful manual in PDF so would need to send it via email – However, take a look here – lots of shaper info.:
**LINK**
lathes-UK has the manual I have, as well as another, at rather silly prices, but the one I have is available via google..
Not sure what the problem is – the winder handle to adjust stroke fits over the square shaft, and there is a lock 'nut' a big round knurled nut that you must loosen to be able to turn the handle – the nut should only be hand tight.
The stroke position is done by moving the slide, but I'm sure that's not the issue…
This is mine, a 2S I believe – with NC'ed steppers added to X and Z – mid right side the square shaft is seen protruding, as is the round 'nut' to loosen.
![side-1.jpg side-1.jpg](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
Better view of it here, top-right.
![x stepper belt cover.jpg x stepper belt cover.jpg](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)