also FYI the spring-loaded worms do not register well with the backlash measurement in PHD. If you review your actual guiding results you'll see they are quite good (i'm assuming the 1.1 arcsec/pixel is from guiding). you can't get that with a backlash of nearly 34 seconds.
Bruce and Andy and I have discussed this ad nauseam?
If PHD only worked with losmandy mounts?i think they would remove that warning, but there are many other types of mounts for which this is a helpful bit of information.?
On Thu, Apr 23, 2020 at 12:51 PM Steve Elmore via <gizmo_s67=[email protected]> wrote:
I received my new GM811G and finally got out under the stars to start learning the mount and Gemini 2 system.? Before I got started, I noticed some movement in the DEC axis.? With minimum effort, i can wiggle the saddle, i.e. DEC axis.? I am working with PHD2 and got some messages about the DEC axis, don't remember exactly.? I ran the guiding assistant and I thought the numbers looked good, except for the DEC Backlash was highlighted.? Here are some of the values:
RA Peak? 0.44px(6.73arc-sec) DEC Peak? 0.37px(5.61arc-sec) RA Peak to Peak0.47px(7.13arc-sec) RA Drift Rate-0.09px/min(-1.41arc-sec/min) RA Max Drift Rate0.04px/sec(0.67arc-sec/sec) Drift-limiting exposure2.4s DEC Drift Rate -0.01px/min(-0.21arc-sec/min DEC Backlash >=34970 +/-99ms(247.1 +/-0.7a.... Polar Alignment Error 0.9 arc-min
Should I address the looseness in the DEC axis?? I've watched the video how to adjust the spring-loaded worm gear.? Would that be the way to eliminate the looseness?
