EQASCOM Movement Strategies
EQASCOM provides two movement strategies.
Normal: RA and DEC move simultaneously to their target positions
Safe: This movement is used when moving from or to an Outside Limits position. The RA axis is first moved to the RA home position, the DEC axis then moves to its target position and finally the RA axis then moves to its target position. This is safer than the “Normal” slewing method because whilst entering/leaving the “Outside Limits” zone only the RA axis is moving and so the mount will take the same final approach to a given position irrespective of starting position.
If RA limits are applied then they will set the range over which will “normal” slewing will occur. Gotos/Parks/Unparks to/from positions outside of the limits will be implemented using a safe goto.
If RA limits are off then all movements from counter weight down (CW down) positions will be performed as simultaneous RA/DEC. Movements from counter weights up (CW UP) positions (i.e. where the mount has tracked over the meridian) are implemented using the Safe method.
Limits Not Applied
|Start||Destination||Operation||Flipped Goto||Movement Type||Comment|
|CW Up||Anywhere||Goto/Park/Unpark||No||Safe||Mount may have tracked into a position where any DEC movement causes collision so safe moves are used.|
|Anywhere||Anywhere||Goto||Yes||Safe||Flipped gotos can go to any target position - user must supervise and stop if collision is likely|
|Start||Destination||Operation||Flipped Goto||Limits applied to Goto||Movement Type||Comment|
|Within Limits||Within Limits||Goto||Yes or No||Yes or No||Normal|
|Within Limits||Outside Limits||Goto||Yes||Normal||The flipped goto request is ignored and a standard goto is performed instead.|
|Anywhere||Outside Limits||Goto||No||Yes or No||NONE||Goto out of limit position can't be initiated.|
|Outside Limits||Anywhere||Goto||Yes or No||Yes||NONE||Limit will prevent goto|
|Outside Limits||Within Limits||Goto||Yes or No||No||Safe|
|Within Limits||Within Limits||Park|
|Within Limits||Outside Limits||Park|
|Outside Limits||Within Limits||Park|
|Outside Limits||Outside Limits||Park|