ASTRO-PHYSICS 3600GTO Manuale di avvio rapido - Pagina 4

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

rotation is free and there is no backlash, you have finished the operation. Replace the top center spur gear and the gear

box cover.

Alternate Method for Adjusting the Gear Mesh

There is another technique that can be employed with success, especially if you are having difficulty with the above

procedure.

This procedure should ONLY be used on a system that is properly balanced. Much of this procedure is the

same. Please follow the instructions up through the point where you have loosened the gear mesh adjustment screws.

At this point, you should have identified if there is a more difficult direction to turn the worm wheel. It is very important

that you know whether one direction has more resistance than the other, and that you know which direction (clockwise or

counterclockwise) is the more difficult to turn.

NOTE:

Read the following instructions through completely once or twice before starting this procedure. You will be

actually operating the mount, albeit at a slow rate, but you don't want to have to stop to figure ouot what comes next once

the procedure is started!!

1. Replace the center spur gear in the gear reduction train so that the motor is again engaged with the worm.

2. Power up the system with the keypad attached.

3. Set the keypad button rate to 64X.

4. Determine which direction on the keypad corresponds to the direction of highest resistance in the worm gear. Remem-

ber that the center spur gear that you just replaced will be turning in the OPPOSITE direction from the worm gear!

5. Press the corresponding direction button from step 4 above, and while holding the button down, remove the keypad

plug from the GTOCP3 control box. The mount will continue to move at the 64X rate.

6. Apply pressure as described for the first procedure trying to reach the point where you just begin to hear a slight

change in the motor's sound indicating that the worm's resistance is increasing. Because the worm is turning, releas-

ing or reducing the pressure will relax the mesh again. Find the exact point just before tension begins to increase.

7. While keeping the pressure on the motor / gearbox constant, tighten up the gear mesh adjustment screws as described

above for the original procedure.

8. Plug the keypad back in and bump the direction button to stop the motion of the axis.

9. Remove the center spur gear and re-test the rotation in both directions. Follow this with the tests for backlash as

described starting on page 1.

10. Repeat if necessary, but you may want to move the mount's position back to where you started before attempting the

repeat.

If rotation is free and there is no backlash, you have finished the operation. Replace the top center spur gear and the

gear box cover.