Help with a new iEQ45
Posted 06 December 2012 - 11:56 AM
Posted 06 December 2012 - 12:13 PM
Now, for me, I think Polaris will rotate slightly when the RA is rotated, as the scope isn't pointed straight at Polaris, but takes into account the North Star being off-set. But don't quote me, as I've never tried that. I usually get pretty good rough Polar from my polarscope on the iEQ30 (and then: Alignmaster!).
Those are my first thoughts; I'll keep thinking.
Posted 06 December 2012 - 12:15 PM
Posted 06 December 2012 - 03:30 PM
Posted 06 December 2012 - 04:28 PM
When you are properly aligned,the polar scope circle,in my case 40 is where polaris is located and the "clock" number,like 9 oclock,is displayed in the hand controller.That is where the north star will be set to,not the center.Dont worry about cone error now untill you
get much closer..It should work if things are proper.I just got my mount last week and its fine.
There is software that tells how far of NP you are,but use it with 3 star.I find the polar right on.
Posted 07 December 2012 - 08:01 AM
I also offer a least of tips that I have collected from various sources here: http://www.the3dwiza...5/initial-setup
Posted 07 December 2012 - 11:31 PM
My setup procedure with a view of Polaris to minimize offsets and trailing:
With the mount leveled and the latitude correctly set with my Ipad Clinometer.
Using the polar scope..first CENTER Polaris in the reticule using the alt/az adjusters on the mount.
With the OTA mounted, center Polaris in your eyepiece (or illuminated reticle ep),and/or your camera live view screen, by unlocking your DEC and manually centering it (side to side). If your ota plate has adjustable screws for cone error you can dial it in to center (up and down), otherwise, just settle for the center of the ep..it may be higher or lower.
If you are using a guide scope, enable the bullseye overlay and center Polaris in the guidescope.
Now the polar scope, the ota and the guidescope are all centered on Polaris.
Now, using the polar scope, adjust Polaris' position to the correct spot on the reticle, based on the Polaris position readout in the hand controller.
Shut the mount off and turn it back on...you now have a correct 'zero' position.
Now you can perform the 2 or 3 star alignment routines with minimum offsets. I use my guidescope bullseye to center the alignment stars. After the second, or third star is centered, it will give you your polar offset. If it says 3' lower - 6' east, it means you must adjust your mount alt/az to raise it 3' and 6' west.
I am usually able to get to 00-00 within 3-4 iterations of the above routine. This will give you 1-3 minutes of unguided exposures typically.
Hope it helped...