Quote:
Originally Posted by avandonk
The G11 has a 25:1 gearbox between the servo and worm. You can have the best servo and encoder but it is meaningless if you have backlash in the gearbox and even worse random movements. The best worm will then also fail to perform to it's exquisite parameters.
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In my experience backlash has only been a problem for me in the past when calibrating with PHD. If there is too much of it and PHD is calibrating within the backlash then there can be troubles in guiding. Having said that if the mount is "loaded" both in RA and DEC, backlash has never been an issue while guiding. It also never impacted on guiding accuracy. That's what I have observed with my G11 over the past few years. As long as you're pushing the load and not reversing the servos direction while guiding you're good to go. Worm backlash can be eliminated by spring loading the meshing. The backlash inside the gearbox is very minimal also and wouldn't be a major problem I'd say compared to the worm backlash.