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Old 23-07-2014, 09:32 AM
Poita (Peter)
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Join Date: Jun 2011
Location: NSW Country
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New iOptron mount with encoders?

This looks interesting:
https://www.ioptron.com/index.cfm?se...8-5f8fcfe34872
Looks like similar pricing to the EQ8.

Quote:
The All NEW iOptron®CEM60-EC
With high precision encoder.
An extraordinary innovation in mount design...Now with a new payload!

This past year we introduced a new design concept -- the center-balanced equatorial mount (or CEM) called the ZEQ25. Now, we're proud to introduce the CEM60-EC with high precision encoder and sub-arcsecond PE! -- with an increased payload of 60 lbs! The CEM60-EC puts the weight of the payload at the center of gravity allowing for greater natural stability. This makes the mount extremely light compared to its payload--a nice benefit when setting up at a remote site. And polar aligning is quick and accessible all the time since the polar scope is not blocked by the declination shaft.
The CEM60-EC is equipped with the most advanced GOTONOVA® GOTO technology, making it one of the most powerful and accurate GOTO mounts available. Its database includes over 300,000 objects. The other features include an adjustable counterweight bar, magnetically loaded gear system, gear switches on both R.A. and DEC axes, screw/worm type latitude adjuster and built-in or customized cable management system. The CEM60-EC - a new category (and payload capacity) of mounts for viewing and astrophotography.
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Old 23-07-2014, 10:23 AM
AndrewJ
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Join Date: Mar 2006
Location: Melbourne
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Gday Peter

There is a massive thread ( or two ) on this mount on CN.
It has shown some "quirks" that may or may not affect users depending on the arcsec/pixel you are working at.
ie there still appears to be a very fast sinusoidal ripple in the tracking
approx 2-4 arcsec pk-pk at a 5.4second frequency, and some very slow underlying tracking errors due to the tolerances in the encoder etching.

Also, some users are reporting problems at times when trying to guide, ( possibly due to clashing with the encoder, but dunno yet ).
The guiding problem may be overcome by finding some optimum guide settings, but so far, the ripple in RA has not been fixed.


Andrew
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