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Showing results for tags 'cem25'.
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Hi Guys, I'm looking for some help, I'd like to upgrade my DOB to a GOTO/Tracking mount. Primary aims are to no longer have to nudge to keep things in view and perhaps some initial planetary imaging via video capture. My scope is the skywatcher 200p (1200mm/F6). While the weight (10kg/22lbs) is well within what the CEM25 claims to support I wonder is it realistic to stick this scope on it? I will also probably use this with just a camera for some wide field work and also learn the ins and outs of EQ mounts, tracking, maybe auto guiding in the future and eventually buy another scope for dedicated DSO AP. Does this approach seem feasible or am I going the wrong way? Thanks, Peter.
I bought a new CEM25P and just spend two nights trying to get it to track. I've had many GEM mounts over the last 30 years, so I thought this would easy. But it seems that either I have a problem with the mount, or I am getting old. I leveled, balanced, and polar aligned the mount well. Then I attached a guide scope. I did NOT attach the cable from the guidescope to mount. I also did not attach the mount to my computer. This way I could watch stars drift and get an idea of was going on with just the mount. I checked the CEM25's tracking rate, and it is set to sidereal. LAT/LONG and perfect. Time accurate. Next, I watched stars drift on my laptop using PHD. When the mount is turned on, and tracking turned ON - the stars move somewhat quickly in RA. Like they are slewing slowly. When I turn OFF the tracking (zero key) they still drift, but a little slower. When I turn off the power to the mount, of course the stars drift, but at slower rate still - normal sidereal rate. When I turn the power back on the stars drift a little faster. Turn the tracking back on, and they drift faster still. But when I set the slew speed to 2x, and press and hold down the left arrow key, and the stars STOP drifting. Perfect tracking. Thanks for any advice! CF