UD53 User Guide
Issue code: 53nu3
10
5 Setting Up the UD53
The instructions in this chapter apply when the Drive is being set up for the
first time with a UD53 fitted.
5.1 Initial setting up
By default, the UD53 is configured for operation with a resolver having a 3:1
turns ratio. If the resolver to be used has a turns ratio of 2:1, set parameter
16.10 Resolver turns ratio select at 1.
5.2 Phase offset
When the Drive is operating in the Servo mode, either the resolver shaft
must be aligned with the motor shaft so that no phase offset exists, or the
phase-offset must be entered in parameter 16.09 Resolver phase offset.
The phase offset can be entered in either of the following ways:
• Performing a resolver phasing test. The UD53 measures the phase
offset automatically and enters the value in 16.09.
• If the phase offset is known, you can enter the value manually in
parameter 16.09.
See also Appendix B Aligning the resolver mechanically.
Resolver phasing test
(Closed-loop Servo mode)
Warning
During the phasing test, the motor shaft rotates slowly.
Before starting, make sure it will be safe for the motor to
be run.
During the phasing test, the motor shaft rotates in two stages, as follows:
• Initial jump in position by up to
1
N
revolution
• Subsequent rotation by
4
N
revolution
Where
N is the number of motor poles.
Examples
No. of poles Initial jump Subsequent rotation
2
Up to
1
2
revolution
2 revolutions
6
Up to
1
6
revolution
2
3
revolution
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