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Duncan Kitchin
scholastic sledgehammer
Reged: 12/16/04
Posts: 841
Loc: Beaverton, OR, USA
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Re: New Atlas EQ-G Making Funny Noises (Sound File)
05/22/08 01:55 PM
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That sounds perfectly normal to me, although it would be easier to tell with some longer high speed slews.
What typically happens is that the rattling starts at some particular slew speed as the motors are ramping up, then goes away and comes back during the slowdown part. That's what I hear from mine and I gather that is in common with other people's experience also.
It's caused by some slop in the bearings in the gearbox a long way in the geartrain prior to the worm drive. I seem to recall somebody talking about fixing it by tightening up the gears (preventing them from slopping sideways along the shaft) but it doesn't affect the accuracy of the mount at all and puts additional unnecessary load on the motors.
HTH
Duncan
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Atlas EQ-G
150mm f/5 Newtonian, Baader MPCC
80mm f/11.4 Guidescope
Canon 300D Modified with Baader IR Filter
Orion StarShoot Autoguider
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