Bob, I have bolted my piers directly over my carpet in my observing room which is a very solid concrete monolithic pad. It is a commercial grade carpet, ...
34474
Larry Phillips
llpastro
Jan 1, 2012 4:36 pm
I have always seemed to have issues with good imaging near the zenith with my Mach1 also. Not sure what causes it but it has been a minor issue so I have not...
34475
daniel_ducros
Jan 1, 2012 5:03 pm
Happy New Year from France. Daniel...
34476
Marty Tippin
nw0l
Jan 1, 2012 5:46 pm
I've found a discrepancy in the most recent 900GTO mount manual regarding the distance the mount moves via azimuth adjustment knob. In the version dated *Dec...
34477
Bill Bradford
bc29375
Jan 1, 2012 6:39 pm
I have a C11 Edge with camera, etc. that weighs 42 lbs on my Mach1. What I have found is that I need to be 2 - 3 lbs heavy on the east to minimize problems at...
34478
Anthony Ayiomamitis
ayiomamitis
Jan 1, 2012 7:04 pm
Bill, I can easily go two hours past the meridian with my AP160 and even greater with my RHA, Tak FSQ and Mewlon 210. Anthony. ... [Non-text portions of this...
34479
Steve Altstadt
pgwsteve
Jan 1, 2012 7:08 pm
My 1200 uses your first example, .53 degree per rev. Since the 900 uses a smaller base diameter, and most likely the same pitch screw, I'd say the later is...
34480
photonphisher
Jan 1, 2012 8:08 pm
You can try manually (using HC) moving the mount while pointed at zenith at 1x rate and watch if there is anything unusual related to PHD and/or guide...
34481
topboxman2000
Jan 1, 2012 8:12 pm
Hi Mark, What kind of scope are you using? If you are using SCT without mirror locks, then it's possible you are experiencing mirror flop when crossing ...
34482
mark_e96
Jan 2, 2012 12:06 am
Thanks guys I am using gso RC10 with OAG and loadstar dont have any issues else where in the sky. As you know its not an easy mount to balance in that you have...
34483
photonphisher
Jan 2, 2012 1:06 am
Is the erratic guiding at zenith periodic with the worm period? That is a spike every worm period? Parijat...
34484
Chris Morley
vk3cjk
Jan 2, 2012 1:27 am
Hi all, I purchased a replacement assembly for one of the two Dec/RA dovetail locking knobs to lessen the chance of a cable snag on my 1200 GTO. Does anyone...
34485
nw0l
Jan 2, 2012 1:49 am
If anyone happens to have an AP 10lb counterweight they don't need, I'd like to take it off your hands... Email me directly please - martyt (at) pobox.com ...
34486
mark_e96
Jan 2, 2012 2:12 am
No its just erratic jumping up and down all over the place not periodic at all. Mark...
34487
Steve Altstadt
pgwsteve
Jan 2, 2012 2:17 am
I did it on mine with close to 90 pounds on it. Based on the way the dec assembly attaches, doing the swap with the OTA pointed at the NCP would be safest. ......
34488
chris1011@...
uncarollo2
Jan 2, 2012 4:35 pm
In a message dated 12/31/2011 7:16:42 PM Central Standard Time, ... I am not familiar with PHD. There is no reason that the polar axis would have any more or...
34489
chris1011@...
uncarollo2
Jan 2, 2012 4:41 pm
In a message dated 1/1/2012 6:06:22 PM Central Standard Time, ... That sounds a lot like the primary mirror or secondary is moving or flopping at the zenith. I...
34490
chris1011@...
uncarollo2
Jan 2, 2012 4:54 pm
In a message dated 12/30/2011 11:54:48 PM Central Standard Time, ... Has nothing whatsoever to do with your problem or with any tracking or guiding. Red...
34491
Bill Bradford
bc29375
Jan 2, 2012 5:33 pm
Anthony, The best I have gotten at the zenith is 30 minutes due to the camera being too close to the pier. I can go longer if shooting farther off the zenith. ...
34492
Anthony Ayiomamitis
ayiomamitis
Jan 2, 2012 5:43 pm
Bill, At the risk of asking a silly question, how you looked into orienting the camera so the field wheel is facing away from the pier? All of this using a...
34493
Anthony Ayiomamitis
ayiomamitis
Jan 2, 2012 5:57 pm
Note to self: proof-read messages before hitting SEND. Let's try again ... Bill, At the risk of asking a silly question, have you looked into orienting the...
34494
topboxman2000
Jan 2, 2012 7:14 pm
Hi Mark, I am not sure this is related to your issue. If you are using the supplied ATRC10 dovetail, you might want to consider tube rings. I have read that...
34495
Howard
howard4ap
Jan 2, 2012 9:33 pm
Ooops! That is what I get for cutting and pasting. The correct value is the second one from page 24 - ...approximately 0.63 degrees (38 arcminutes). Each...
34496
Howard
howard4ap
Jan 2, 2012 9:43 pm
As long as the counterweights are down, you could actually remove both dovetail knobs without the mount falling apart. (I DO NOT recommend this, however!)...
34497
Bill Bradford
bc29375
Jan 2, 2012 10:10 pm
Anthony, I have a CFW8 so do not have the extension of the CFW10. However, you bring up an interesting point. Once I have the OAG turned for the guide star I...
34498
mark_e96
Jan 2, 2012 10:37 pm
Thanks again for the help. I dont think its optics moving as they are pretty well screwed down and I am not seeing any shift in the guidstar - Im using an OAG...
34499
michiganastronomy
michiganastr...
Jan 2, 2012 10:43 pm
A follow up to my earlier experiments. I added 4 - 1 1/2"x5" gussets at the bottom. Between them and the fiber washers I described before there is NO vibration...
34500
William R. Mattil
data_god
Jan 2, 2012 11:21 pm
... Mark, If you aren't seeing the guidestar move then you have good, if not great guiding ? Bill -- William R. Mattil http://www.celestial-images.com...
34501
chris1011@...
uncarollo2
Jan 2, 2012 11:27 pm
In a message dated 1/2/2012 4:37:25 PM Central Standard Time, ... The mount will not and cannot respond erratically to corrections in RA. It is quite possible...
34503
mark_e96
Jan 3, 2012 12:22 am
Rolando Thank you , you may be right I could have got the axis mixed up on the graph(yes has a real time graph), what thru me was the pop up error about RA not...
