ASTRO-PHYSICS GTOCP2 Handbuch - Seite 11

Blättern Sie online oder laden Sie pdf Handbuch für Teleskop ASTRO-PHYSICS GTOCP2 herunter. ASTRO-PHYSICS GTOCP2 14 Seiten. German equatorial with gto servo motor drive

Seite drucken

cable ties (from electronic supply store or catalog) to secure our cables to the mount, telescope, rings or bind them together.

Plastic adhesive cable mounts, available from electronic supply stores, are an alternative choice. We prefer to use ties since

we cannot bear to attach adhesive cable mounts to our telescopes or mounts.

If we use tie wraps to secure several cables together and plan to use that same setup in our next observing session, we keep

the ties in place when we disassemble our equipment. The setup for the next session is much quicker.

GTO Keypad Controller Operation

Please refer to the manual for the GTO Keypad Controller for complete instructions.

MOUNT MAINTENANCE AND ALIGNMENT:

Under normal operating conditions, no maintenance is required. Your 600EGTO is a precision instrument with very accurate

worm and wheel adjustments. Please be careful if you place the mount on a flat surface, i.e. the ground or trunk of your car.

This is true of any fine instrument. We suggest that you transport and store the mount in a case or in a well padded box.

TROUBLESHOOTING –

The LED on the GTO Control Box changes from red to yellow and the motors stop tracking.

The motors are overloaded, probably due to an unbalanced load on your mount.

Rebalance your telescope, re-enter the last object on your keypad and the scope will slew to the correct position. Even

though your motors had stopped, the logic in the control box retained the scope position in memory. As long as you didn't

change the pointing position of the scope, you are still calibrated.

If the scope was moved during re-balancing, simply enter a nearby bright star (on the same side of the meridian) on the hand

controller, press GOTO and allow the mount to finish slewing. You can then move the scope manually or with the N-S-E-W

buttons to center the star in the eyepiece, and press the #9 RECAL button. This will recalibrate the mount.

Note: The unbalance situation is a problem while the mount is tracking. If you do not notice the yellow light , the keypad will

still continue to respond to your commands. If you ask it to slew to another object, it will do so, then as it is tracking again, will

note increased load on the motors due to the unbalance and stop tracking again. The yellow light will turn on again. If you

notice that the stars appear to be drifting as you observe, check for the yellow light.

Additional explanation: The GTO drive circuit includes logic for overload protection to prevent burning out the expensive

servo motors in case of severe overload on the two axes. The primary cause is an unbalanced load in R.A. If the extra load

opposes the motor rotation, the motor must work harder to track at the sidereal rate and the current will rise to high levels. If

the current exceeds the trip point for more than a minute, the logic will shut the motor off and tracking stops. It typically takes

about 4 lb. of unbalance to trip the overload, but a very heavy load of scopes, accessories and counterweights on the mount

can decrease this unbalance threshold.

The power light goes out and the motors stop.

The voltage of your battery has probably gone below 10 volts.

The keypad reset (or locked up) when I plugged my CCD camera, PC (or other equipment) into the same

battery as the GTO mount was using. The battery has a meter which shows 12V.

The meter is reading an average and will not show dips. Gel cells have internal resistance which will cause voltage drop

when the load changes. When you connect an additional CCD camera and PC the load will drop below 9 volts and the

keypad will reset or it may affect the GTO circuit itself and cause the keypad to lock up.

We recommend that you use a large marine battery that is not a gel cell and hook everything up to it before calibrating the

GTO.

If any problems occur, please don't hesitate to contact Astro-Physics for assistance.

additional tips are in the Keypad instruction

ASTRO-PHYSICS INC

11250 Forest Hills Road

Rockford, IL 61115

Telephone: (815)-282-1513

Fax: (815)-282-9847