February 13, 2012 by
Tyler Lane and Meredith McLinn started out the evening at the observatory, and ran into filter wheel troubles; the file below outlines the troubleshooting they went through.
Matt Craig came out to join them around 9:45pm (this was planned before the filter wheel problem came up), and showed them how to move the filter wheel control paddle out to the dome to make troubleshooting easier. The problem (filter wheel not turning) was fixed by tightening the thumbscrew on the bottom of the filter wheel enclosure.
Another issue they encountered was that the main Windows monitor is now the one on the telescope control box. They changed the order of the monitors in the Windows Display control panel so that the monitor on the desk is on the left.
Tyler observed V0556 Cas, then Meredith selected several deep sky objects to look at, including the Beehive cluster and M51; they left around midnight.
Matt stayed the night, observing EY Uma, M101 (SN 2011fe), more M51, and M106.
Need me to pull up anything?
the maxium dl screen that controls the camera
can you drag over WINSCP
Is the filter wheel on?
it’s going *bleep* *bleep* and flashing77777777
it stopped *bleep*ing and flashing, but still
reads the sevens
ok. turn it off anad back on again
display flashing IFW 1.11
set to PCERROR= 1 is flashing on the display
try changing the filter on the wheel to R
I see three buttons and two switches.It turned to 77777777 again.
huh….push one of the arrow buttons up or down
There is a button that says ‘back’, ‘next’,and ‘home’. Which did you want me to use? any?
yes. push next
pushed it once. ERROR=4 flashing stopped flashing
I will push it again?
flashing sevens. Sevens not flashing anymore.
does it display a filter band at all such as “R” or I, or V??
nope, just sevens. Do you think that the switch
that says ‘sbig’ or ‘pc’ will have anything to do with it?
maybe, try that once
ok switched it to sbig. No apparent change.
I didn’t think that was the problem, but it was worth a shot,put back to PC…
back to PC
Should I hit ‘next’ again?
sure, cycle through about 4-5 pushes of the ‘next’ button
error=6 after maybe 4 pushes
should I try the home button?
pushed it, no apparent change.
power cycle, then home button again?
yeah try that
button pushed, still no apparent change
ERROR= 1 – flashed at first
ERROR =3 – never flashed
77777777 – not flashing
I am coming in…I think we should call Dr. Craig
“If the wheel takes too many steps to find the
HOME position or the filter ID is not read correctly, an error message will be displayed for a short time.
An ERROR=1 would display if the wheel rotation to find the HOME position takes an excessive number of steps.
An ERROR=4 would display if the wheel is stuck in a position.
An ERROR=6 would diplay if moving to another position uses an excessive number of steps.
(see trouble shooting guide for more)
try turning off for a few min, then turn it back on one more time…off
Dr. Craig said that the Error= 1 means that the filter wheel isn’t turning,so whenou you turn it back on, hit the next buttion, to see if it changes, I will be out hear listening for it to turn.
OK. Is it moving now?
well, i couldnt move it before i loosened one of the screws
That sounds odd. Why wasn’t it moveable before?
the o O-ring may just be dirty and preventing the wheel fro moving
Should I turn the filter wheel back on now?
just hit ‘next’
IFW 1.11 still blinking
ERROR= 1 flashing
hit next in 5 sec
5 4 3 2 1hit next
ERROR=1 flashing again/still
hitting it again in 5 4 3 2 1 next hit
ERROR= 1 flashing
thats good, stop for now
OK.Hey, could you turn off the filter wheel pleaes?
turn it on quick, push next, once, and if there is no change, turn it off, and we’ll wait
if there is no change from an error message,
I turn it off?
just hit next once, i cleaned the o ring
next hit once
I hit next while the IFW thing was still flashing
it’s reading ERROR=1 now.
Should I turn it off?
yeah, turn it off and we’ll leave it off till Dr.Craig gets here