Stop moving!

Discuss any astro equipment that does not have its own forum, such as focusers, finders, chairs, etc.
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Astroglide65
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Stop moving!

#1

Post by Astroglide65 »

Hello everybody,
So I put on the Bahtinov mask, focus on Vega till the spikes are perfect and when I snug up the set screw the focus tube moves a little. It's got to where I have to "lead" it to the right and hope it squeaks into focus. I haven't had the chance to look it over but it sounds like the tiny rubber at the end of the set screw may need some grease?

Thanks,
Dano
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Re: Stop moving!

#2

Post by Shabadoo »

I hate it when that happens.
Jeff
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Lady Fraktor
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Re: Stop moving!

#3

Post by Lady Fraktor »

What telescope are you using?
Proper Telescopes: Antares 105 f/15, Bresser 102 f/13.2, Celestron 150 f/8, Stellarvue NHNGDX 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen ED115s f/7.7
Mounts: Berlebach Planet w/ 410mm pier, Celestron AS-GT, Celestron CG-5 w/ Argo Navis & tracking motor, SLT w/ 250mm pier & tripod mods, Manfrotto 028b w/ SV M2C, Mantrotto 055Pro w/ 128RC, Skywatcher EQ-5 w/ dual drives, TAL MT1C w/ wood tripod, Vixen SXP w/ HAL-130 & 200mm half pier
Diagonal: 2" A-P Maxbright, 2" Baader Herschel Wedge (P), 2" Zeiss/ Baader Amici Prism (DX2), 2" Long Perng Amici Prism, 2" Stellarvue DX, 2" TeleVue EverBrite
Eyepieces: Antares to Zeiss
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Astroglide65
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Re: Stop moving!

#4

Post by Astroglide65 »

It’s a David H Levy 150mm Mak-Newton.
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Re: Stop moving!

#5

Post by SkyHiker »

I have that same scope and have not (yet) encountered that problem. But I'll be following this (and sign up to this thread by responding).
... Henk. :D Telescopes: 6" Mak-Newt (Comet Hunter), ES ED127CF, ES ED80, Zhumell Z12, Coulter Odyssey 10, AT6RC, Venture RX-7, Celestron Skymaster 20x80, Mounts and tripod: Losmandy G11S, AVX, LXD55, Tiltall, Cameras: Fuji X-a1, Canon SX40, Xt, XSi, T6, ELPH 100HS, DIY: Dob and camera barndoor trackers, afocal adapter, Dob with foldable base and Az/Alt setting circles, Accessories: SSAG, Plossls, Barlows, Telrad, laser collimators (Seben LK1, Z12, Howie Glatter), Cheshire, 2 Orion RACIs 8x50, Software: DSS, ImageMagick, PHD, Nebulosity, Photo Gallery, Gimp, CHDK
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bobharmony
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Re: Stop moving!

#6

Post by bobharmony »

My routine has become to set the lock screw, check focus, release the lock screw, move the focuser, set the lock screw, re-check focus. My hope is the the lock screw shifts focus by the same amount each time, and setting it before checking focus negates its impact between tests. Seems to work ok for me.

It's a different focuser than yours, but that sequence works for me most of the time.

Bob
Hardware: Celestron C6-N w/ Advanced GTmount, Baader MK iii CC, Orion ST-80, Canon 60D (unmodded), Orion SSAG
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Lady Fraktor
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Re: Stop moving!

#7

Post by Lady Fraktor »

From the pictures I can find of your telescope it appears to have a crayford focuser.
It may need a clean and adjustment to get back to normal.
Proper Telescopes: Antares 105 f/15, Bresser 102 f/13.2, Celestron 150 f/8, Stellarvue NHNGDX 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen ED115s f/7.7
Mounts: Berlebach Planet w/ 410mm pier, Celestron AS-GT, Celestron CG-5 w/ Argo Navis & tracking motor, SLT w/ 250mm pier & tripod mods, Manfrotto 028b w/ SV M2C, Mantrotto 055Pro w/ 128RC, Skywatcher EQ-5 w/ dual drives, TAL MT1C w/ wood tripod, Vixen SXP w/ HAL-130 & 200mm half pier
Diagonal: 2" A-P Maxbright, 2" Baader Herschel Wedge (P), 2" Zeiss/ Baader Amici Prism (DX2), 2" Long Perng Amici Prism, 2" Stellarvue DX, 2" TeleVue EverBrite
Eyepieces: Antares to Zeiss
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Astroglide65
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Re: Stop moving!

#8

Post by Astroglide65 »

Well some grease didn't help.
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