You want to keep the RA gear system preloaded opposite the drive direction. Otherwise, you'll get little jumps from stiction as the gears "climb" through the...
120067
Dale M
lionsfan0_16
Jun 13, 2012 8:29 pm
I have noticed this "jump" a cpl of times visually, and i do have a counterweight set but not one that will help in az, how can i correct this? i do not have...
120068
Ken Harrison
ken4optics
Jun 13, 2012 8:35 pm
I used my 12" Lx200 in Alt-Az, guided by PHD and a beamsplitter for spectroscopy. As you are guiding on axis, on a single star, the field rotation doesn't ...
120069
Dale M
lionsfan0_16
Jun 13, 2012 8:38 pm
it may have worked with the Meade but with my Celestron 11" CPC it did not work in Alt/Az mode. also with PHD guiding From: Ken Harrison...
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Bob
greggmhill
Jun 13, 2012 9:28 pm
What scope and mount do you have? Gregg Hill...
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John Mahony
jmmahony
Jun 13, 2012 9:34 pm
Most guiding software can guide either through the autoguider port, or using serial signals to the RS232 port. Some computerized scopes won't guide from the...
120072
John Mahony
jmmahony
Jun 13, 2012 9:38 pm
You're assuming he's in equatorial mode. We don't know what type of mount this is, and if it's a fork, is it alt-az or on a wedge for eq mode? Another...
120073
John Mahony
jmmahony
Jun 13, 2012 9:53 pm
I think there's a picture of this 2-screw collimation in Rod's "Guide to used SCTs" (free pdf download from his website). I've never opened one up (never...
120074
Dale M
lionsfan0_16
Jun 14, 2012 12:12 am
mine is a fork in Alt/Az mount!! From: John Mahony <jmmahony@...> To: "sct-user@yahoogroups.com" <sct-user@yahoogroups.com> Sent: Wednesday, June 13,...
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Sam Barziza
b52ceti
Jun 14, 2012 2:29 am
Howdy: I have a question. What do people use for autoguiding, webcams, uncooled cameras, small, light weight ?? How good are uncooled cameras, which is the...
120076
Chris Peterson
cloudbait
Jun 14, 2012 4:18 am
On an altaz mount, the azimuth is inherently balanced. But it could have gear slop, such that there is some float, and that combined with stiction could cause...
120077
Chris Peterson
cloudbait
Jun 14, 2012 4:36 am
Yes, I'm assuming an equatorial mount. Beyond that, it doesn't matter if it's a fork, GEM, or other design. Chris ******************************* Chris L...
120078
dom7mak
Jun 14, 2012 2:04 pm
Hi All, I am a new member and this is my first post/question. Can someone explain me the specifics of the optics in the f/6.3 Meade SCT's? Do they have the...
120079
Edward Thomas
eftrat
Jun 14, 2012 3:44 pm
The servo motors used in many mounts rarely sound the same going both directions and the majority of the sound comes from the motor gearbox. So in general, it...
120080
John Mahony
jmmahony
Jun 14, 2012 5:32 pm
Actually it makes an important difference. Assuming this problem is caused by imbalance in RA, if it's a GEM, RA balance would be determined by the...
120081
Chris Peterson
cloudbait
Jun 14, 2012 5:44 pm
Actually, it makes no difference. The post you responded to was where I was explaining why you need to keep an equatorial mount preloaded to the east. That is...
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William Hamblen
wrhamblen
Jun 14, 2012 7:28 pm
... Work back from the eyepiece. The f/6.3 light cone is wider than the f/10 light cone. If you put the secondaries roughly the same distance from the...
120083
John Reilly
jmr.6@att.net
Jun 15, 2012 12:56 am
That was a "priceless" response! Thanks for the laugh! (psychic phone line) JMR ________________________________ From: John Mahony <jmmahony@...> To:...
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Worsel
bryancashion
Jun 15, 2012 2:42 am
He already know that you would laugh at it. Bryan...
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John Reilly
jmr.6@att.net
Jun 15, 2012 12:44 pm
? (knew) But whatever, it was still funny! Ha ha ha ________________________________ From: Worsel <bryancashion@...> To: sct-user@yahoogroups.com Sent:...
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James
vikel
Jun 15, 2012 3:02 pm
I have Bob's Knobs and have been quite happy with them but since I got some collimation software (GoldFous and Collimation), I find that I cannot make the...
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Ken Strauss
kstrauss7
Jun 15, 2012 5:10 pm
What camera are you using with the GoldFocus software? From: sct-user@yahoogroups.com [mailto:sct-user@yahoogroups.com] On Behalf Of James Sent: Friday, June...
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dom7mak
Jun 15, 2012 6:05 pm
Thank you Bud! What you are suggesting makes sense. I will do some calculations over the weekend. I am still surprised how little is known about these f/6.3...
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Kerry Koppert
kerrykoppert
Jun 15, 2012 11:44 pm
... The Bob's Knobs website tells you how to identify the original thread. http://www.bobsknobs.com/SCT/page25/page51/C11hints.html either 6-32 or M3. I...
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John Mahony
jmmahony
Jun 16, 2012 3:52 am
Bud left out some details- the less convex secondary means the sec must be closer to the back of the scope so that the focal plane is still beyond the rear...
120091
John Mahony
jmmahony
Jun 16, 2012 3:55 am
... On the contrary, length is very critical. The sec in most SCTs is mounted on a metal plate, maybe 1/4 thick in smaller models, and the three collimation...
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James Cunningham
vikel
Jun 16, 2012 4:28 pm
A mallincam. James V. Cunningham <http://home.comcast.net/~vikelj/page2.html>http ...
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Randall Scarberry
drrandys
Jun 17, 2012 2:03 am
Love those vehicles on your website, James. Â I'm not sure you're all THAT lucky that your wife doesn't also like cars, because you're bound to have to spend a...
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James
vikel
Jun 17, 2012 7:15 pm
Thank you. Jim...
120095
Christopher Go
stone_1990
Jun 18, 2012 1:05 pm
Weather had been terrible here for the past week because of Super Typhoon Guchol. The skies finally cleared today but transparency was poor. The northern...
