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On-board help
Cardan shaft alignment
Cardan drives are installed and operated with a large offset between the driver and the driven
shaft. Depending on the type of cardan shaft in place, a minimum deflection angle of the uni-
versal joints may be necessary in order to ensure sufficient lubricant circulation, which in turn
prevents the universal joints from seizing. A large difference in the deflection angles ß1 and
ß2 (refer to image below) leads to rapid fluctuation of the driven shaft RPM during operation,
which can lead to grave consequences for electronically-controlled synchronous and asyn-
chronous AC drive motors.
For smooth operation the machines should be aligned such that the driving and driven machine
shaft centerlines are parallel. 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.
(1)
Positioning of machines in an area with limited space
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(2)
For optimal running condition, the deflection angle ß
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Measurement procedures in the cardan application
For cardan applications, select the coupling type 'Cardan' when configuring the machines.
The following measurement procedures are available for cardan applications:
Cardan rotating plane – This is the default measurement procedure for cardan applic-
l
ations. This procedure allows precise measurement of machines joined by cardan shafts
without having to remove the cardan shaft. This procedure is used in conjunction with
cardan rotating arm bracket.
Multipoint – In this procedure, the cardan must be dismantled. Measurement is carried
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out using Multipoint measurement mode in conjunction with the cardan offset bracket.
Static clock – In this procedure, the cardan must be dismantled. Measurement is carried
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out using static measurement mode in conjunction with the cardan offset bracket.
130
and ß
should be equal
1
2
Version:2.3
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