MDM Trouble Report for 2009 Nov 21 Telescope: 2.4m Observer(s): Ondrej Pejcha (OSU) Instrument: CCDS Problem(s) Encountered: I encountered a very similar problem to what happened on Nov 18. About 200s after I started an exposure the telescope stopped tracking (unlike the previous case I wasn't focusing, just exposing). I flipped the tracking switch off and on which didn't help initially. I moved the telescope with paddle a bit and then the tracking started to work again. I cleared link in xtcs and wanted to slew with xtcs, however, the telescope started to slew in a completely different direction. I stopped its movement and slew manually to zenith and tried to slew the telescope again with xtcs, which worked. Almost no time lost and no further problems encountered. ------------------------------ Submitted on 2009 Nov 22 [6:26:03]