STV guide wrong connection to Telescope CCD port

Hi folks,
I have in my hand a friend STV that claim no guide function out,
I spent in the past a lot of night guiding film photos with this baby so and I accept to check out what wrong with it.

Well, executed the relay sequence (1-2-3-4) to check out the RJ 11 pin out, I noticed that do not match the standard configuration also declared in the manual as follow:

Ralay 1 RA+ (and this is the only one correct)
Ralay 2 RA-
Relay 3 Dec+
Relay 4 Dec-

Firmware version are 1.06 H the last one I suppose and the same I had in my STV

The normal sequence should be

Ralay 1 RA+
Relay 2 Dec+
Relay 3 Dec-
Relay 4 RA-

I guess if there is something to set somewhere to change into correct order.

I did already the P RAM reset but nothing change.

Thanks to everybody knows a first clue !

Massimo

 

Yes, is a reversed cable, grey one.

 

If you mean the 2 internal jumpers for relay box... yes ! they are in non relay box position.
I do not think that this could cause such mismatch of the signals.

M.

 

Any others indications ?

 

Hi Doug, no fail the calibration every time ! try to suppose to use your STV with non reversed cable... STV can't perform axis calibration because sequence is not respected.

 

Hi I'm back after holiday to try to understand what's going on on my STV.
Relay (1-2-3-4) pin out of the RJ 11 cable do not match the standard "ST-4" configuration sequence.

except for the first
Relay 1 RA+ (and this is the only one correct)
Relay 2 RA-
Relay 3 Dec+
Relay 4 Dec-

other three are wrong as you can see above; they should be
Relay 1 RA+
Relay 2 Dec+
Relay 3 Dec-
Relay 4 RA-
in other words declination are in the middle meanwhile RA are siders.

Of course this cause a big problem when ST move Relay 2 (RA-) the mount move unexpectedly the Dec+ and STV give "error star" a correct answer.

My question toward SBIG engineers is how can assign the correct Relay-RJ pin instead go with my abnormal solution: make a personal custom cable ?

Best Regards
Massimo

P.S. Bought New baby Sti is amazing !!!!

 

Dear Massimo,

See page 44
http://archive.sbig.com/pdffiles/stv_manual.pdf

 

Hi Tim,
Thank you for your answer, It's a pleasure to speak with you ! even in Italy you are well known to astronomical community.
Let me congratulate for your new job position, I believe you'll finally give a personal touch to SBIG-MAXIM solutions.

Page 44 of STV manual give the exact information as my message does up above on how the telephone connector should be connected, the last part is not pertinent as far as I do not use Relay Adapter box.

I missed something ?

Massimo Uberti

 

Dear Massimo,

Thank you for your kind message. I actually did not read the first reply My apologies.
I think your best solution is to make a custom cable.

Best wishes
Tim

 

OK I solve the problem, STV come to live and respond correctly to calibration and guide. I really missed what can be happened inside to constrain me mixup the cable in that way !

Regards
Massimo