Loosen the clamp screw on the lower
carriage stop and slide the stop so it
touches the grinding head, then tighten
the clamp screw.
Move the grinding head off the other
end of the reel and set the stop for that
end.
The third middle stop is for spin
grinding conical reels. It can be set a few
inches past where the grinding stone
stops grinding to shorten the stroke. As
the grinding stone increases the length of
contact with the reel, the middle stop can
be moved so that it is always a few inches
past where the grinding stone looses
contact with the reel. When almost the
whole length of the reel is being ground,
the middle stop can be moved to the end.
If you are going to use the middle stop,
make sure you position the end stop to
allow for the thickness of the middle stop.