ASTRO-PHYSICS 3600GTO Manuale di avvio rapido - Pagina 2

Sfoglia online o scarica il pdf Manuale di avvio rapido per Telescope ASTRO-PHYSICS 3600GTO. ASTRO-PHYSICS 3600GTO 4. Worm gear

subtle. You may want to grab the scope or plate at each end and use two hands. Again, fingertips will tend to give the

most accurate sense of feel.

If no play is felt or seen, then you do not have a Dec. backlash problem.

If play is felt or seen in the telescope eyepiece, proceed with the following adjustment.

Remember that the definitions above relate to backlash which is a gear mesh that is too loose. The instructions below

deal with both conditions: backlash and over-tightened mesh. If the mount's axis is making noise, like the motor is

straining, or it is jumping and stuttering, the worm gear mesh may likely be too tight against the worm wheel.

It is important to make this engagement diagnosis to eliminate it from the other possibilities, such as motor or

servo controller issues.

The action to follow will negate the PE correction established by PEMPro. After the check or

NOTE:

test the PEMPro runs will have to be done again. Any movement of the worm other than by the motor

drive will negate the PE correction.

The basic design of the gear meshing system is the same for all of the 3600GTO mounts produced. The system is based

on a pivot bearing on one side of the motor / gearbox assembly, and a pair of lock-down bolts on the other side.

Pivot Bearing

DO NOT LOOSEN!

Adjusting the Worm Gear Mesh on your 3600GTO Mount

The following instructions apply to both axes. There are some differences

between mount production runs, but they will be noted in the text below.

Do Not loosen the two screws that retain the worm drive until you do the

following:

Shut off the GTOCP3 servo drive and remove the 5 screws that secure the

reduction gearbox cover using a 3/32" hex key (image right). Then remove

the top center spur gear, exposing the two gears below.

This is also a case where an assistant can be useful to observe movement in an eyepiece.

Worm Wheel

Locking Bolt Slots

Place your fingers on the gear

that is attached to the worm.

This is the gear having three

attachment screws clearly

visible. Rotate the gear with

your fingers in both directions.

This gear should turn freely in both directions without backlash when properly

adjusted (image at left).

If you felt backlash in the system, you should find that the gear rotates easily in

both directions. You will therefore be adjusting the mesh a bit tighter. If the

gear is difficult to turn, then the mesh is too tight, and you will be loosening the