Zero Offset vs. Sky PA Offset

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Section 2.3.1 - Sky PA And Zero Offsets


Zero Offset Information


Another reason for changing the Zero Offset is the device could be to shift the "point of no cross" for cable management purposes. The device firmware is intelligent enough to know that it should not rotate in such a way that will cause the cables to wrap up. The point which the rotator will not cross is always 180 degrees from the devices internal zero point. Thus, setting a zero offset shifts the "no-cross" point.



Sky PA Offset Information





Changing the Sky PA by manually entering a new number will not cause the rotator to physically rotate. Also, it will not change the physical position that the rotator travels to during a home procedure, but will instead change the current displayed position angle and the position angle reported by the ASCOM driver to a client application.


In the Pyxis LE control program, you may reset the Sky PA by homing the rotator, then clicking the Change... button to set the Sky PA to zero.


Conceptual Help


The Sky PA Offset/Zero Offset system used by the Pyxis LE has been designed for the convenience of the user. We understand that it can be confusing to figure out the subtle differences between Sky PA offset and Zero Offset. If after reading the above information you still have questions or concerns, please contact Optec technical support. We will be happy to assist you in understanding the concepts and execution of the offsets used by the Pyxis LE.