Last updated: 26 October 2004
Sent: Monday, October 25, 2004 08:17:13 From: Ian Docherty (firstname.lastname@example.org) I thought I would send you a quick e-mail to advise fellow ETX users of a design flaw that has inflicted my ETX 105 and which may also occur in other models in the ETX range. Twice now whilst out viewing with my telescope the alt drive has failed, I thought it was the batteries and checked them, they were fine, then I thought gears may be slipping so I degreased them, this had no effect. I could not find the problem until I dismantled the telescope, I took out the base and when I saw the internal wiring it had been pulled into the gears and had been 'cut' by them. I soldered the wire back together and all seemed to be working, this problem has happened twice and am now very good with a small soldering iron! The problem seems to be that when the base turns through 360 degrees the internal wiring gets dragged over and into the drive mechanism. I have now taped the wires together with strips of duck tape so that they are too big to slip into the drive mechanism, the only problem with that is that it may now put too much pressure on the wiring as it turns in the base, only time will tell. I have attached a photo (someone else's) showing the area where the gear and the brass threaded bar pull in the wires and cut them. I am now out of my years warranty so I decided to fix this myself, I am still a little annoyed by it, as it seems like a fundamental design flaw. However I am still happy with my EX. 105, nearly two years on and still enjoying it.
Just thought I would send this in the hope that other people can benefit from my experience. Regards Ian
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