Orion 7817 instruction manual Attaching the Dec. GoTo Motor

Models: 7817

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Attaching the Dec. GoTo Motor

R.A. GoTo

Connected

motor cover

4-pin

 

rectangular

 

connectors

R.A. GoTo motor

Figure 7. R.A. GoTo motor wiring

Attaching the Dec. GoTo Motor

Before attaching the Dec. GoTo motor drive, the telescope tube must be removed from the equatorial mount.

1.Remove the Dec. slow-motion control knob from the Dec. worm gear shaft. The Slow-motion knob will not be usable once the SkyView Pro GoTo system has been installed. All slow-motion adjustments will be made using the GoTo hand controller.

2.Slide the geared end of the remaining small brass gear onto the Dec. worm gear shaft of your SkyView Pro mount so it resembles Figure 8. Rotate the small brass gear so that one of the setscrews will press against the flat part of the Dec. worm gear shaft. Secure the small brass gear by tightening the setscrews with the included 2mm hex key, but do not overtighten. You may have to make small adjustments to the gear’s position in the following step to ensure proper gear engagement.

Brass gear

Setscrew

Dec. worm gear shaft

Figure 8. Correct orientation of brass gear for Dec. axis

3.The Dec. GoTo motor assembly is identified by its black, rectangular body (Figure 9). It is attached to the equato- rial mount using the Dec. GoTo motor attachment screw that goes through the hole in the flange at the top of the equatorial mount (Figure 10). The motor assembly should attached so that it is oriented as shown in Figure 11. Hold the motor assembly so that its threaded hole lines up with the hole in the top of the mount. Place the lock washer and

then a flat washer onto the Dec. GoTo motor attachment screw. Use the 4mm hex key to thread the attachment screw into the motor assembly attachment hole until it is secure, but do not overtighten.

Smaller gear

Attachment hole

Dec. GoTo motor attachment screw

Figure 9. The Dec. GoTo motor assembly

Flange

Hole

Figure 10. The location of the flange on the mount

4mm hex key

Dec. GoTo motor

Flange

Figure 11. Attaching the Dec. GoTo motor

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Orion 7817 instruction manual Attaching the Dec. GoTo Motor