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7.2 Cardan drive machines
This section describes the aligning of cardan shafts using the cardan shaft bracket lite
ALI 2.874 SET iS used in conjunction with OPTALIGN smart RS5 BT system. Cardan
drives are installed and operate with a large offset between the driver and the driven
shaft. The cardan shaft is set at a considerable angle (usually 4° to 6°) in order to
ensure sufficient lubricant circulation, which in turn prevents the universal joints from
seizing. Excessive misalignment of such a configuration leads to rapid fluctuation of
the driven shaft RPM during operation, which holds grave consequences for electron-
ically-controlled synchronous and asynchronous AC drive motors.
Precise alignment reduces the rotational irregularities of the cardan shaft to a minimum,
so that the uneven bearing loading during cardan shaft rotation is also minimized, the
service life of the components is extended and the chance of unexpected machine
failure is reduced.
The measurement procedure described here allows precise measurement of machines
joined by cardan shafts over distances of up to 3 m (10 ft) and shaft offsets of up to
400 mm (15 3/4 in).
7.2.1 Mounting the faceplate to the rail
1. Slide the the faceplate down the rail as shown in
1
below. The four T-nuts
should sit in the grooves.
2. After positioning the faceplate on the rail, tighten the four socket head screws
using the provided M5 allen key [
2
].
Cardan drive machines
1 2
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