HEIDENHAIN IK 5494-2D - Manual (Page 317)

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9
Encoder Setup
The relative brightness of the pattern can be changed to facilitate the
evaluation. Click the Persistence button to display the Persistence
Adjustment data field. The persistence of the pattern image can be
changed from 1 to 1000. Higher numbers result in brighter pattern
images.
The combined-phase pattern will form a circle when the encoder output phase amplitudes are equal. Gen-
erally when the pattern displayed is not circular, the reader head will need to be realigned, and the encoder
recalibrated from the beginning.
CAUTION
Encoder reader head realignment and any other encoder maintenance or repair should
be performed only by your OEM or Metronics distributor.
6 When the pattern is circular, repeat the process described in steps 1 through 5 to calibrate any remain-
ing analog encoders.
7 Close the Encoder Setup program, Center the stage axes using the joystick and proceed to QC5200 QC5200
Encoder Setup Encoder Setup next in this chapter.
A persistence of 100 produces a dim display A persistence of 1,000 produces a bright display
Calibrating Analog Encoders