#1  
Old 15-12-2014, 08:59 PM
PRejto's Avatar
PRejto (Peter)
Registered User

PRejto is offline
 
Join Date: Jan 2011
Location: Sydney, Australia
Posts: 1,302
My St-i?

Tonight, finally after not imaging for nearly 2 months, my ST-i is acting up. To me it looks possibly like the shutter, though I'm hardly sure about this. Any thoughts?

The dark frame looks entirely normal.

Thanks,

Peter
Attached Thumbnails
Click for full-size image (ST-i.jpg)
213.7 KB29 views
Reply With Quote
  #2  
Old 15-12-2014, 09:31 PM
gregbradley's Avatar
gregbradley
Registered User

gregbradley is offline
 
Join Date: Feb 2006
Location: Sydney
Posts: 15,612
Yes that is what I would guess the trouble is. Take it off the guide scope and watch it when you get it going. Perhaps the shutter has some dirt on it and its not fully retracting.

It only does that once and the software uses the same dark to auto subtract.

Greg.
Reply With Quote
  #3  
Old 15-12-2014, 10:02 PM
PRejto's Avatar
PRejto (Peter)
Registered User

PRejto is offline
 
Join Date: Jan 2011
Location: Sydney, Australia
Posts: 1,302
Hi Greg,

I followed your advice. The shutter appears normal when taken off the mount and connected directly to the computer.

Thanks,

Peter

Edit: Put it back on the mount power and now it's working as expected. Strange because I did power it off and then reconnected it (before taking the camera completely off) and it was still returning the strange image. This kind of thing is vexing. Maybe it won't return (until I want to do something really important!!!)
Reply With Quote
  #4  
Old 16-12-2014, 08:10 AM
Paul Haese's Avatar
Paul Haese
Registered User

Paul Haese is offline
 
Join Date: Jan 2009
Location: Adelaide
Posts: 9,468
I get this a fair bit Peter. It is the shutter and it is to do with power from the USB's as far as I can tell. I regularly unplug the USB cable and reseat it just to get rid of any contact dirt etc. That seems to fix it for a while until the next time it does it again. I found with a MHP it would do it all the time with the shutter showing just the barest of a slit. That was unworkable in the end for remote operation.
Reply With Quote
  #5  
Old 16-12-2014, 11:15 AM
PRejto's Avatar
PRejto (Peter)
Registered User

PRejto is offline
 
Join Date: Jan 2011
Location: Sydney, Australia
Posts: 1,302
Quote:
Originally Posted by Paul Haese View Post
I get this a fair bit Peter. It is the shutter and it is to do with power from the USB's as far as I can tell. I regularly unplug the USB cable and reseat it just to get rid of any contact dirt etc. That seems to fix it for a while until the next time it does it again. I found with a MHP it would do it all the time with the shutter showing just the barest of a slit. That was unworkable in the end for remote operation.
Thanks a lot Paul.

I suspect you are correct. Vexing as I've installed a powered hub just to run the ST-i. Until last night I'd not seen this before. It's always something!!

Peter
Reply With Quote
  #6  
Old 16-12-2014, 05:01 PM
Bassnut's Avatar
Bassnut (Fred)
Narrowfield rules!

Bassnut is offline
 
Join Date: Nov 2006
Location: Sydney
Posts: 4,772
I had all sorts of trouble with hubs until I pluged it straight into a PC usb socket. I think it draws a far bit of power.
Reply With Quote
  #7  
Old 16-12-2014, 06:28 PM
lazjen's Avatar
lazjen (Chris)
PI cult member

lazjen is offline
 
Join Date: Dec 2012
Location: Flaxton, Qld
Posts: 1,748
Just for the record, I use my ST-i through a powered hub with no problems.
Reply With Quote
  #8  
Old 17-12-2014, 07:30 AM
cfranks (Charles)
Registered User

cfranks is offline
 
Join Date: Feb 2008
Location: Tungkillo, South Australia
Posts: 599
Quote:
Originally Posted by lazjen View Post
Just for the record, I use my ST-i through a powered hub with no problems.
Me too. I also hear the shutter 'cycle' when I connect the ST-I with TheSkyX.
Charles
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 12:03 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Advertisement
Astromechanics
Advertisement
Celestron RASA
Advertisement
Bintel
Advertisement
Star Adventurer
Advertisement
EQ8-R
Advertisement
Testar
Advertisement
Lunatico Astronomical
Advertisement
Astronomy and Electronics Centre
Advertisement