Re: Possible defective unit - SOLVED! #iEXOS-100
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Hi Paul, I noticed that also.
In fact, it seems to be a 'cyclical' sound ...like the motor is whirring round and round.
I didn't think much of it as the mount was finding and tracking objects quite well.
That is until I went to track the moon and switched from siderial to lunar tracking....that's when i noticed the moon appeared to 'wobble' a little bit in synch with the hissing noise you've mentioned.
The wobble might not be related to the hissing sound - perhaps my balancing is off and I need to adjust - but I just thought I'd mention it.
Either way, I have noticed the same sound as you are describing.
I have something similar happening with my iEXOS-100 that I received about three weeks ago. When I power on the mount, I hear a constant hissing sound that begins about 5-8 seconds after I turn it on, before there is a connection to the PC or internal Wi-Fi network or ExploreStars or APT. It happened the very first time I turned on the mount and every time since. It just sits there and both motors hiss (and there is no movement of the mount since nothing is talking to it or controlling it). I am working with ES support to try and find out if this is normal behavior for the mount. Does anyone else experience this hissing sound? Thanks.
Mounts: iExos 100, Skyguider Pro
Scopes/Lenses: Main/Orion 80mm, DSLR/Tamron 18-400mm lens, guide/ZWO-340A
Cameras: Canon T2i DSLR, ZWO120MM (guide)
Utility Software: iPolar (for Skyguider polar alignment), iCap, Explorestars, Canon EOS Utility
Image Processing Software: Photoshop