ASTRO DEVICES Nexus DSC, User Manual

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Nexus DSC User Manual
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you would like to account for. There is a
mathematical formula associated with each error
and it is referred to as a term. You can select
which terms to use for your telescope model by
selecting
Mpoint Parameters from the Align
menu:
Use
and
keys to choose a check box
for a term. Use and
keys to
enable/disable the term.
The bottom left corner of the screen show a page
number of terms. There are currently 19 terms
spread over 4 pages.
Activate the
Next button and press
key to
go to the next page:
Term Mount
Type Description
RA Offset All IA (AZ offset for AltAz)
RA Scale All Usually equal 1
Dec Offset All IE (Alt offset for AltAz)
Dec Scale All Usually equal 1
Tube
Square AltAz or Collimation error:
for Alt/Azimuth
mounts it is non
Term Mount
Type Description
perpendicularity
between pointing
direction and altitude
axis.
Mount
Square EQ Non-perpendicular
error - in equatorial
mount if the RA and
Declination axes are
not perpendicular.
NPAE AltAz non perpendicular
axis error
PAxis NS AltAz Azimuth Axis
Misalignment North-
South (AN)
PAxis EW AltAz Azimuth Axis
Misalignment East-
West (AW)
Tube
Flexure AltAz Tube Flexure (TF)
Fork Flexure EQ For fork mounts -
the flexure in fork
arms
DEC Axis
Flexure EQ Declination Axis
flexure (DAF)
RA Sine All AZ Sine for AltAz
(HCES)
RA Cosine All (HCEC)
Dec Sine All (DCES)
Dec Cosine
All
(DCEC)
Mount
Square Sine EQ
PAxis NS
Sine EQ Polar Axis North-
South Misalignment
Sine
PAxis NS
Cosine EQ Polar Axis North-
South Misalignment
Cosine
The terms above are in the order of significance.
Mpoint Edit Points
Once the telescope is aligned on a number of
objects you can check how they errors are
distributed in relation to the average centre. To
see all alignment objects' error distribution you
need to select
Mpoint Edit Points :
OK