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Scope Collimation
Our tests with our 12" Skywatcher have yet to be successful. I will be picking up my Astrid tomorrow, Saturday, so maybe that will help. (1) How do you keep the vibrations low when in transit so the mirrors stay aligned? |
Kevin:
Not sure what model you have and what you mean by "tests", but I have a 12-inch Sky-Watcher 300P GoTo, WiFi controllable scope. It gets transported A LOT - in the back of a pickup, and I rarely, if ever, run into collimation issues. I transport the OTA laying on its side in the original large cardboard box it was shipped in (see attached). I put 5-inches of soft foam in the box, under the OTA to absorb any sudden jolts. After you collimate the primary, there are "lock-down" knobs next to the collimation knobs that you tighten down. This "locks the collimation in place". After I lock down my collimation, I seem to have little to no collimation issues. Are your mirror clips loose? My 2ndary has never needed re-collimation in the several years I've had it. I do my collimation with just a standard laser collimator - see attached. Also.... If yours is a GoTo and WiFi capable, forget the bulky SynScan hand controller and use the SynScan app for Android phones - and control the scope via the WiFi app (it's MUCH easier). After a "north level", and 2 star alignment, I just type in the RA & DEC of my Target Star and the scope almost always slews itself to within 1 camera FOV of the Target. Other "mods" I did.... * I designed my own motorized focuser (via a gear motor) * I added a 2nd place to put the finder - on the metal tube that also holds the mirror * Added resistors to the back of the 2ndary as an anti-dew unit * Stuck a bubble level to the base * Built a 3-wheel dolly to move it around the yard, and out to my truck (rough weight of the scope is about 100lbs - 50 for the OTA, 50 for the base). The dolly saves my back! George
_ Sky-Watcher Collimation Knobs.JPG
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_ Astromania Collimator on Amazon.png
_ Scope _ Transport Box.JPG
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George covered this¡ but to add my two cents, I have used multiple dobs up to a 20 inch obsession (Westchester Amateur Astronomers) that I added digital ¡®Push To¡¯ setting circles to¡ and the best method is with a laser.
You can get away with the Cheshire eyepiece for smaller scopes, but for 12¡± you¡¯re going to need a laser. We also carefully modified the mirror strap and made certain the centering pins actually centered the mirror.? Then, we changed all the polls and even changed the cage clamps. It was surprising how crude that expensive scope was made. Rick Bria? |
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