Modded CG-5 and QHY5 guider

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eid
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Modded CG-5 and QHY5 guider

Post by eid » Sat Dec 17, 2011 5:24 pm

Hello,

I've just modded my Celestron CG-5 motor controller with the Shoestring port kit and am trying to use the QHY5 to guide it in PHD.
However, the software will only move the mount in one direction on the DEC axis and none on the RA.

It seems the guider is only sending signals through one wire, as Ive done voltage tests and there is only a drop in voltage when the "North" button is pressed.

I found another thread on here regarding relays which seemed like it may be relevant, but I wanted to be sure, hence this post. (viewtopic.php?f=4&t=168&p=1003&hilit=qhy5#p1003)

Is my guider unable to control this modded mount? And if so, why does it work at all?

What do I need to make this work?

Any help is appreciated.

Thanks

dpanderson
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Re: Modded CG-5 and QHY5 guider

Post by dpanderson » Sun Dec 18, 2011 8:45 am

If you were using our GPUSB, then you would need a cable between the guide port and the GPUSB that is wired "pin 1 to pin 1" per this document:
http://store.shoestringastronomy.com/gu ... cables.pdf

With the QHY5, I don't know if the pinout is reversed thus rquiring a "pin 1 to pin 6" cable, but I suggest you take a look at this as a possibility.
Doug Anderson
Shoestring Astronomy
http://www.ShoestringAstronomy.com

eid
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Re: Modded CG-5 and QHY5 guider

Post by eid » Mon Dec 19, 2011 5:59 am

Thank you, I'll look into that.

eid
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Re: Modded CG-5 and QHY5 guider

Post by eid » Wed Dec 21, 2011 8:29 am

The pin configuration is straight through. So I have been using the correct cable.

So a GPUSB should work with this hand controller with the added Shoestring port..nothing else is needed (added relays etc)?

dpanderson
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Re: Modded CG-5 and QHY5 guider

Post by dpanderson » Wed Dec 21, 2011 12:34 pm

I have never done a modification of a CG-5 handcontroller myself, so I don't know the specifics for it. I have only done the EQ style as shown in this document:
http://store.shoestringastronomy.com/eq_mod.pdf
Doug Anderson
Shoestring Astronomy
http://www.ShoestringAstronomy.com

eid
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Re: Modded CG-5 and QHY5 guider

Post by eid » Wed Dec 21, 2011 1:18 pm

Yes, that is exactly the same as the cg5 handset.

Anyway, I've now ordered the GPUSB. If it doesn't work, I'll send it back for a refund.

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