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Motorized Declination Drive

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#1 equuleus

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Posted 06 September 2013 - 10:13 PM

Anybody had good, bad or indifferent experience with the dec drive on a standard 3.5? Comments?

#2 Billydee

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Posted 07 September 2013 - 06:38 PM

I find it is a great modification and very easy to use with my PG II. The only problem is you must take it off every time you want to put it back in it's case.

Bill

#3 equuleus

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Posted 07 September 2013 - 07:52 PM

What's involved in attaching and removing?

#4 Mike E.

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Posted 08 September 2013 - 08:30 AM

Have a look here...

www.company7.com/questar/accessories.html

Scroll down to "Questar 3-1/2 Declination Drive, Motorized", and click on.

#5 equuleus

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Posted 08 September 2013 - 08:56 AM

Thanks much, Mike. Very helpful.

#6 dcriner

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Posted 30 September 2013 - 07:57 PM

What could be simpler that manually setting the dec? It doesn't need to be motorized, in my opinion.

#7 Billydee

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Posted 30 September 2013 - 08:46 PM

When you have PG it is very easy to control the dec using the PG Hand Control and both axis can be moved with one finger and you never have to touch the mount or OTA. This is only available when you have the dec motorized.

Bill

#8 dcriner

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Posted 12 October 2013 - 06:09 PM

Bill, I'm still confused. What is a PG hand control? A Google search turned up nothing.

But, the knob on the side of the 3.5 adjusts dec precisely. Each star or most other bodies will always have the same dec, at least for any date, right? Perhaps we are not talking about polar alignment here - which is what I use.

My 3.5 sits on a solid concrete pedestal. I don't mind touching the 'scope to adjust the dec for a new target. And RA is adjusted automatically all night by the Questar powerglide.

#9 Billydee

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Posted 12 October 2013 - 07:00 PM

The PG hand controler is a PowerGuide hand controler. This is a 9 volt controler that is hooked up to the base of the Q 3.5 with a cable. It has a number of buttons that allows you to move the RA and the Dec in any direction. You must have a Motorized Declination Drive to use the PG to move the Dec. Think of it as electronic push to.

Bill

#10 dcriner

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Posted 13 October 2013 - 08:38 PM

OK, Bill, thanks. I have a PG handbox, but didn't know it by that name. Anyway, I am perfectly satisfied with polar alignment, setting the dec manually to a visible star, rotating the RA manually to get the star in the 'scope, turning on the Power-Glide, and then setting the RA disk to the time. Done. I will touch up the RA as required with the hand box or, more likely, just manually. If the dec needs touching up, the manual vernier works fine for me. I have a stable pier for my 'scope, and fingering the 'scope doesn't seem to cause a problem for me.

I became exasperated with the electronics of the Meade ETX-90 GoTo controls, computerized alignment, etc., and have gravitated toward the hands-on, manual simplicity that the Questar allows. Except for the Power Glide RA controller, I prefer no computers or electronics between me and the 'scope.

#11 dkapla12

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Posted 02 November 2013 - 04:33 PM

The dec drive is useful if you take pictures of planets through the Questar. When imaging, the image is magnified so much that turning either the RA or dec knobs will push the image right out of the field. The motorized drives will allow you to slowly and smoothly adjust the image.

#12 dcriner

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Posted 08 November 2013 - 08:48 PM

OK, thanks. I'm not into astrophotography. I use my Questar only for visual observing. I have had no problem adjusting the dec manually.

#13 munirocks

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Posted 07 December 2013 - 05:39 PM

I always thought that handling the silky smooth controls on the Q was part of the appeal. I even have a theory as to why the RA control knob is on the opposite side to the RA indicator. Rumour has it that on the early Mac computers they intentionally put the on/off switch around the back so you had to "hug" the machine when you turned it on. I'm only saying... ;)






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