Adjustments; Adjusting The Altitude/Azimuth Slewing Motion; Adjusting The Altitude Handle Position - Vixen X002518 Instruction Manual

Adjustments

Adjusting the Altitude / Azimuth Slewing Motion
Test the motion smoothness of the PORTA II Mount with a balanced scope by moving the telescope tube by hand in
altitude and azimuth (without using the alt-azimuth handles). Depending on the length and weight of the telescope,
you may find too much or too little resistance to the motion. This resistance may also change with use. Directions
here are to adjust this motion tension to your preference.
Peel back the rubber cover
①
on the mount base and
remove the 4mm (smaller)
Allen wrench
Adjust tension by rotating the screws and testing the motion by pushing/pulling on the tube.

Adjusting the Altitude Handle Position

You can change the orientation of the altitude handle relative to the optical tube to suit your observing preference.
You may also wish to do this to avoid confusing it with the dovetail lock screw knob.
Put the scope in a horizon
①
-tal position, grasp it with
one hand, back off the
safety screw and dovetail
lock knob.
Locate the two large Allen
③
head screws holding the
dovetail mounting block
onto the altitude axis plate.
Grasp the dovetail block
and back out the screws
with the Allen wrench.
Reorient the altitude axis
⑤
to place the altitude handle
in a desired position as
shown in the figure right.
Match the dovetail block
with an outer pair of thre
-aded holes on the altitude
axis plate.
Co ve r Co ve r
A llen Wre nc hes A lle n Wr enc hes
Safety Screw Safety Screw
Dovetail Lock knob Dovetail Lock knob
Dovetail Block Dovetail Block
3/16" Wrench 3/16" Wrench
Locate the Allen screws
②
that control the tension of
the altitude or azimuth
motion in the picture at
right. These screws are
recessed on the stationary
part of each axis assembly.
Peel back the rubber cover
②
on the base of the mount
and select the 3/16" (larger)
Allen wrench.
Remove the dovetail block
④
from the mount. Note the
outer ring of threaded holes
pairs on the altitude axis
plate. These will be used
to reorient the dovetail
block.
Attach the dovetail block
⑥
with the previously remo
-ved Allen screws. Put the
Allen wrench back to the
tool compartment on the
mount base.
13
A l ti t u de A l ti t u de
A l l en S c re w H o l e A l l en S c re w H o l e
A z i m u th A l l en A z i m u th A l l en
S c r e w H o l e
S c r ew H o l e
C o v e r C o v e r
3 / 16 " Wre n c h 3 / 16 " Wre n c h
3 / 16 " Wre n c h 3/ 1 6 " Wr e nc h