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There are currently two types of safety encoders installed on the telescope. The There is a different procedure for adjusting the older Kuebler safety encoders. |
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If the encoder was decoupled from the axis then the encoders will have need to have the zero offset adjusted.
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Normally these should never require adjustment, especially the scale factor term. But if the encoder was removed for repair or replacement then the zero offset term will likely require adjustment.
Tag Name | Current Value |
|---|---|
ALT_SCALE_FACTOR | 99.05493 |
ALT_ZERO_OFFSET | 184868 |
AZ_SCALE_FACTOR | 614.3545 |
AZ_ZERO_OFFSET | 558945 |
Navigate to the Engineering – Safety Encoders screen on the GIS HMI.
Compare the Target Home Position to the main axis encoder position. They should match. If they do not match an adjustment needs to be made to the zero offset.
Calculate the correct offset:
Mathinline body --uriencoded--\text %7BZero Offset = AB Absolute Encoder Counts - (Target Home Position * Scale Factor)%7D
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