Round Rail Quick Start Guide
29
rig on the track so that you can precisely adjust the height of the magnets
relative to the magnet sensors on the pinch wheel on the underside of the
rig.
The bracket that holds the magnet has two holes, and there is no
convention regarding which hole to use for the Limit magnets and which
to use for the Datum magnet. Whichever arrangement is used, the two
brackets with an identical arrangement are used for the Limits at the ends
of the track, and the bracket with the magnet in the other hole is used for
the Datum which is between the Limits.
The track motor pinch wheel on the underside of the rig has two switches
(sensors) that run over these two magnet positions — one switch for the
Limits and one for the Datum.
1.
Mount the two Limit Switch magnets (the two brackets that have the
magnet in the same hole) onto the underside of the rack — one at
each end of the track about a metre from the end. The actual
distance depends on your requirements and on which side of the rig
your Limit Switch is on (located on the track motor pinch wheel on
the underside of the rig). Position the magnet along the rack so the
Limit Switch
magnet
Datum Switch
magnet
End of track
Teeth
side
