Installation and Configuration
Ndrive HP 10/20/30 Manual
2-20
www.aerotech.com
2.6.1. Encoder Phasing
Figure 2-17 illustrates the required encoder phasing for clockwise motor rotation, or
positive forcer movement through the stationary magnet track. If the motor is not visible,
or may not be manually moved by hand, it may be actively driven open loop, under
program control, by running the A3200\Programs\Samples\MsetDebug.Pgm program.
This program will move the motor in a positive direction, allowing the position of the
encoder to be monitored in the “Pos Fdbk” field of the Diagnostics tab of the Nstat
utility, as shown in Figure 2-18. The program should cause the encoder to produce a
more positive position as the program executes. If it counts more negative, swap the
connections to the controllers SIN and the SIN-N encoder inputs, or you may invert the
sign of the CfgFbkVelMultiplier and CfgFbkPosMultiplier parameters. However, if this
axis is configured for dual loop, two feedback devices, one for position and one for
velocity feedback, invert the sign of only the one parameter associated with the
incorrectly phased feedback device.
Figure 2-17.
Encoder Phasing Reference Diagram
Figure 2-18.
Encoder and Hall Signals in the Nstat Utility Program
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