AMD2000 Series - Servo Drive - User Manual
110
DS619-0-00-0019 - Rev 0
ANCA Motion
Figure 10-10 idCmd_a.dat and idFb_1.dat during a successful DQA
Alignment Off the Index Pulse
For motors with an incremental encoder, it is possible to align the electrical angle off the index pulse in order to
improve the accuracy of electrical angle. To this end, the
index pulse offset
(namely the distance between the
index pulse and zero degree of electrical angle) needs to be commissioned for each individual motor and
encoder assembly. If the encoder is replaced, it will need to be re-commissioned. Failure to properly configure
this feature can result in axis runaway.
Table 10-3
below lists the configuration parameters.
Table 10-3 Configuration parameters for alignment off index pulse
IDN
Name
Default
Unit
Note
33058
Index Pulse Offset Maximum
Deviation Threshold
1700
[10
-4
elec rev]
33060
Field Orientation Initialisation
Control
0: none
1: once
2: always
33062
Alignment Off Index Pulse
Control
0
0: disable
1: commissioning
2: enable
33064
Index Pulse Offset
0
[10
-4
elec rev]
Procedure for commissioning and enabling alignment off index pulse
Step1:
Determine the angle between the index pulse and the
d
-axis, that is, the
index pulse offset
.
1. Ensure that the drive is disabled.
2. Set
Alignment Off Index Pulse
to
Commissioning Mode
(IDN 33062 = 1).
3. Set
FOI Control
to
Always
(IDN 33060 = 2).
4. Set
FOI Type
to
DQ Alignment
(IDN 33065 = 1).
5. Monitor
Index Pulse Offset Evaluation
(IDN 33057) and
Index Pulse Offset Estimate
(IDN
33063).
6. Enable the drive and allow the
DQ Alignment
algorithm to complete. At this stage IDN 33057
should be zero. Slowly jog the axis until the index pulse is found (IDN 33057 = 1). Take a
record of IDN 33063. Disable the drive, and then repeat this step to ensure that the calculated
Index Pulse Offset Estimate
(IDN 33063) is repeatable.
Step2:
Enable alignment off index pulse.
1. Ensure that the drive is disabled.
2. Set
Index Pulse Offset
(IDN 33064) to the value of
Index Pulse Offset Estimate
(IDN 33063)
that was determined in the previous step.