Celestron CGEM DX, Instruction Manual

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26
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1 . Multiply the desired tracking rate (arcseconds/second) by 4 .
Example: if the desired trackrate is 150 arcseconds/second,
then TRACKRATE = 600
2 . Separate TRACKRATE into two bytes, such that
(TRACKRATE = TrackRateHigh x 256 + rackRateLow) .
Example: TrackRateHigh = 2 TrackRateLow = 88
3 . To send a tracking rate, send the following 8 bytes:
a)
Positive Azm tracking:
80, 3, 16, 6, TrackRateHigh,
TrackRateLow, 0, 0
b) Negative Azm tracking: 80, 3, 16, 7, TrackRateHigh,
TrackRateLow, 0, 0
c)
Positive Alt tracking:
80, 3, 17, 6, TrackRateHigh,
TrackRateLow, 0, 0
d) Negative Alt tracking: 80, 3, 17, 7, TrackRateHigh,
TrackRateLow, 0, 0
4 . The number 35 is returned from the handcontrol
Send A Slow-Goto Command Through RS232
To The Hand Control
(note: Only valid for motorcontrol version 4.1 or greater)
1 . Convert the angle position to a 24bit number .
Example: if the desired position is 220°, then
POSITION_24BIT = (220/360) x 224 = 10,252,743
2 . Separate POSITION_24BIT into three bytes such that
(POSITION_24BIT = PosHigh x 65536 + PosMed x 256
+ PosLow) .
Exampe: PosHigh = 156, PosMed = 113, PosLow = 199
3 . Send the following 8 bytes:
a)
Azm Slow Goto:
80, 4, 16, 23, PosHigh, PosMed,
PosLow, 0
b) Alt Slow Goto: 80, 4, 17, 23, PosHigh, PosMed,
PosLow, 0
4 . The number 35 is returned from the handcontrol
Reset The Position Of Azm Or Alt
1 . Convert the angle position to a 24bit number, same as
Slow-Goto example .
2 . Send the following 8 bytes:
a) Azm Set Position: 80, 4, 16, 4, PosHigh, PosMed,
PosLow, 0
b)
Alt Set Position:
80, 4, 17, 4, PosHigh, PosMed,
PosLow, 0
3 . The number 35 is returned from the handcontrol
4 . Note: If using Motorcontrol version less than 4 .1, then send:
a) Azm Set Position: 80, 3, 16, 4, PosHigh, PosMed,
PosLow, 0
b) Alt Set Position: 80, 3, 17, 4, PosHigh, PosMed,
PosLow, 0