Re: Shutter on ROB...

[droege@snapmail.us]

Rob,

Believe it or not, I just had a trouble like this at Fermilab where I have
a system set up to test CCDs for the DECam project.

There the servo motor was drawing enough current to overload the +5 volt
power supply.  In this case they had moved the electronics and had set the
current limit too low.  I just happened to notice that the overload light
was blinking.  The symptom was that the motor would not open the shutter
and then the software would die in funny ways.

So check on the +5 power supply.  It is probably sick.

Tom Droege

> When grilled further on (Thu, 4 Nov 2004 13:58:19 -0600 (CST)),
> droege@snapmail.us confessed:
>
>> Rob,
>>
>> OK the first thing to do is to sort out whether it is the MA Servo motor
>> or not.  Since it only happens on one shutter, just swtich the two and
>> see
>> if the problem switches.   If it switches, then it is something in the
>> drive electronics, if it does not, then it is a defective MA servo
>> motor.
>>
>
> I unplugged both servos and have been running so far with no errors.  Any
> speculation as to how the servo is affecting the system in this manner?
>
> I'll dig up a replacement this weekend and see how it works.
>
> Cheers,
> Rob
>
> --
>  21:22:28 up 18 days,  4:08,  2 users,  load average: 2.45, 2.27, 2.16
> Linux 2.6.5-02 #8 SMP Mon Jul 12 21:34:44 MDT 2004
>