ASCOM LACERTA MOTORFOCUS, Руководство пользователя

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LACERTA MOTORFOCUS 18 2016
the limit the „basic” backlash compensation is in use, above the limit the
„approaching from one direction only” is in use.
Attention:
Please use
„basic” backlash compensation exclusively
when
the Temperature compensation is active without Exposure monitoring ,
because the photo may defocused due to focusmotor movement while an
exposure is going on!
BacklMultp:
(Backlash Multiplier, the value is from 1 to 10) is a factor determining the
"overdose" of backlash correction for the „approaching from one direction only”
method. (
Backlash value is multiplied with BacklMultp ). The movement to the
Out
direction is as usual without compensation. But if the movement is to the
In
direction, the step number of the motor is increased by the given value, and
then the motor moves back in the Out direction by this same value to reach
the desired position from the Out direction only. Because backlash appears in
both directions, these two backlashs in different directions cancel out each
other precisely and the focuser position can be reproduced exactly.
No compensation to Out direction.
To In direction the formula of the compensation is the following:
In = Step + (Backlash*BacklMultp)
Out = (Backlash*BacklMultp)
In this case the final movement direction is only Out .
If the last movement direction was
In using „Basic backlash compensation”,
and the motor steps at movement to In direction exceed the BacklChg value,
then the compensation formula is the following:
Out = Backlash (position uncounted)
In = Step + (Backlash*BacklMultp)
Out = (Backlash*BacklMultp)
Pos.Max.:
Limits the maximal focuser position. This value is adjustable dynamically
between
300 and 65535 . (The default value is 15000, the maximum travel of
Octo60 focuser.)
TempComp:
Step numbers per 10 degrees temperature difference, this value may be
b/-5000.
Comment:
The temperature data refreshes about every 30 sec., or at the end of
exposure. The initial temperature and
Focuser position will be saved, these
will be the base of Temperature compensation . If the Focuser position is
modified manually or by ASCOM , this new position will be the base of
Temperature compensation .
Tip – how to calculate the TempComp value
Adjust focus at two different temperatures. E.g the accurate focus position is
at position 540 when the temperature is 18,2°C. Later, the accurate focus