EQ6 Pro losing go-to alignment
Posted 17 April 2009 - 09:29 AM
For the past month or so I've experienced some strange issues with my EQ-6 Pro. If I do a proper 1, 2, or 3 star alignment, the very first slew works perfectly, bringing me to the target object with good accuracy. However, subsequent slews are way off, in the range of 15 degrees or more.
I can't figure out what's causing this error -- power supply is consistent, the scope is well balanced, etc. The mount performed without issue for about 1 year before the problems began.
I'm at firmware version 3.10, should I upgrade and hope that this resolves the problem? (And if so, any suggestions for where to purchase the required RS-232 cable?)
Posted 17 April 2009 - 11:45 AM
I'd recommend updating the firmware to V3.24. V3.10 was pretty buggy (although probably not your immediate cause of problems). ScopeStuff has the appropriate RS232 to handset cable for the EQ6/Atlas EQ-G SynScan controller. You can find it at:
ScopeStuff EQ6 Handset Cable
For your immediate problem, your RA clutch might be slipping, or your power supply might be under the weather. If you find your GOTOs are drifting in precision, it wouldn't hurt to check the time in the setup menu on the hand controller and see if it's correct. If the clock is drifting, that would explain the loss of precision. So would a drop in the power supply performance as the slew load taxes it beyond the tracking load. Clutch slipping is not uncommon on some of these mounts as well, as the lubrication migrates around inside the mechanicals.
The EQ6 Yahoo! Users Group has instructions on removing the clutch (really just a little brass plug) and cleaning it up. It can get tricky, though, if it gets stuck in the slot; sometimes it just doesn't want to come out and be played with.
Posted 19 April 2009 - 12:33 PM
Posted 19 April 2009 - 12:34 PM
But off by 15 degrees sounds to me like it's possibly a time zone issue, 15 degrees is one hour, and that smacks of being a daylight savings setup error. You are in the eastern time zone, are you setting the timezone as -5 hours and then setting 'yes' to daylight savings? If you are setting the timezone to -4, and saying yes to daylight savings, that'll do pretty much exactly what you are describing as the problem.
Another thing to check, are the clutches slipping ?