14
To LOOSEN the mesh (INCREASE the backlash), first
loosen the outer two screws a little bit by turning them
counterclockwise the same amount, then tighten the
center screw by turning it clockwise.
Loosen/Tighten the three screws only in small incre-
ments to avoid over-adjustment or possible damage
to the worm or ring gear!
10. Now, with the DEC clutch lock lever tightened, jog the
saddle rotationally back and forth again by hand and see
if the backlash has decreased to a more desirable level.
11. After the gear mesh has been adjusted to your
satisfaction, re-install the three cover screws removed in
Step 8, and then re-tighten the four screws on the bottom
of the worm gear housing loosened in Step 7.
12. Before retightening the two screws loosened in Step 6,
use the hand controller’s up or down directional button
to drive the DEC motor and the worm gear for a few
seconds. This will allow the motor to auto-center and
align the drive shaft with the worm rod. After this is done,
the two screws can be fully tightened.
13. Now use the hand controller to slew the DEC axis
at least 2 complete cycles (720 degrees) to check if
there is any stalling or binding as a result of your mesh
adjustment. If there is, be sure to repeat this procedure
from the top and make the necessary adjustments. If
there isn’t, re-attach the DEC motor housing with the
three screws removed in Step 5.
specifications
Product name
HDX110 EQ-G
Mount type
German equatorial GoTo
Payload (counterwts. excl.) 110 lbs. (50kg), depending on
telescope length
Saddle type
Wide (Losmandy style)
R.A. worm wheel
Dia. 219.5mm, 435 teeth,
aluminum
Dec. worm wheel
Dia. 219.5mm, 435 teeth,
aluminum
RA shaft
Dia. 55mm, aluminum
Dec. shaft
Dia. 55mm, aluminum
Motors
0.9° hybrid stepper motors
Transmission
435:1 worm drive + 64
microstep/0.9° stepper motor
drive
Resolution
11136000 counts/rev; approx
0.12 arc-second
Tracking accuracy
typically ±3 arc-seconds (native)
Maximum slewing speed
3.3° /s
Tracking rates
Sidereal, solar, lunar
Autoguiding speeds
0.125x, 0.25x, 0.5x, 0.75x, 1x
PEC
100 segments permanent PEC
Latitude adjustment range 10° – 65°
Azimuth adjustment range ±10°
Counterweight shaft
Dia. 31.5mm, length 15.9"
(403mm), weight 5.7 lbs. (2.6kg)
Counterweight
22 lbs. (10kg) each (x2)
Tripod pier
Height range 31.1"-43.3" (790-
1100mm)
Tripod leg diameter
2.4" (60.5mm)
Tripod min. folded length
32.5" (82.6cm)
Tripod leveler pads
Qty 3, all metal, height range
2.7"-3.7" (69-94mm)
Polar alignment
Software assisted (iterative) or
optional polar scope
Polar axis scope
Optional, external mounting
Hand controller
SynScan, illuminated keypad
Database
42,000+ objects
Celestial object catalogs
Messier, NGC, IC, SAO,
Caldwell, Double Star, Variable
star, Named stars, Planets
Pointing accuracy
Up to 5 arc-min (RMS)
GoTo alignment
1-star, 2-star, 3-star
Resolution of aux. encoders 17,624 Counts/rev., approx. 1.2
arc-minutes
Weight of EQ head
(excl. Counterweight shaft) 55 lbs. (25kg)
Weight of Tripod Pier
63 lbs. (28.6kg)
Case for EQ head
Dimensions: 19.5"x23.5"x25.5",
incl. casters
Power requirement
11-16V DC, 4A
Power cable
12V DC cigarette lighter style
with threaded connector to
mount
RS-232 cable
Included