What could cause this?

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bigfish
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What could cause this?

#1

Post by bigfish »

Hello,
I'm having this problem where the motor will monetarily stop working and then start again. When it stops it makes a grinding sound. Anyone else having this problem? What's happening. :(

Orion SkyView Pro 8" 1000mm (f/4.9) GoTo Reflector Telescope.
ZWO 30mm Mini Guide Scope, ASI120 Mini, ASI183MC Pro.
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Lady Fraktor
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Re: What could cause this?

#2

Post by Lady Fraktor »

If you turn the slew rate lower does it still make the sound?
It sounds like there are worn gear teeth or loose/ skipping gears inside.

If it is still under warranty send your video to Orion Tech Support, do not open it without their say our you could likely void your warranty.
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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bigfish
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Re: What could cause this?

#3

Post by bigfish »

Thanks for the reply.
Do you think a grossly unbalanced telescope could cause it?
I played with the mount for hours yesterday without the scope on it and could not reproduce the sound. I'm going to try today with the scope on it. I think it may be my fault for not balancing.
What would happen with a higher end mount if the scope was really out of balance?
Orion SkyView Pro 8" 1000mm (f/4.9) GoTo Reflector Telescope.
ZWO 30mm Mini Guide Scope, ASI120 Mini, ASI183MC Pro.
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yobbo89
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Re: What could cause this?

#4

Post by yobbo89 »

that's sound i've never heard before haha, ahh is the steper motor one of those systems with a gear box attached to it?


what mount is this ?
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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yobbo89
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Re: What could cause this?

#5

Post by yobbo89 »

bigfish wrote:
Sun Oct 18, 2020 3:18 pm
What would happen with a higher end mount if the scope was really out of balance?
the motor stalls , the sound is less of a grind noise but more of a clunk,clunk,clunk.. yours sounds like it's chirping pretty loud even for a motor stall. makes me think that's theres balance problem,or a tight spot on the worm wheel which is causing load on the steper motor gear reduction box if it has one .. too much clacking for a stepper to a gear cog to a worm .

it may even be just a bearing
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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KathyNS
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Re: What could cause this?

#6

Post by KathyNS »

Balance problems will certainly cause weird noises, erratic motor behaviour, and, ultimately, mount failure.

Always, always balance the rig. If you are in a desperate hurry, an approximate balance is better than none at all. But the stars aren't going anywhere. Take your time and get it right.
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DSO AP: Orion 200mm f/4 Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide scope; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on HEQ5 pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome; iOptron CEM60 (pier); Hall's Harbour Observatory (H2O)
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Lady Fraktor
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Re: What could cause this?

#7

Post by Lady Fraktor »

Definitely balance the telescope.
A 200mm newtonian is a lot of telescope for a Skyview Pro to carry in the first place.
Once you do get it balanced I would recommend turning the slew speed down a step or two just to be nice to the motors.
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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bigfish
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Re: What could cause this?

#8

Post by bigfish »

It seems both motors stop when this happens.😢
I have balanced the scope and it still is happening. It appears the damage is done. 😭
I don't see any slew speed control, only tracking.
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Orion SkyView Pro 8" 1000mm (f/4.9) GoTo Reflector Telescope.
ZWO 30mm Mini Guide Scope, ASI120 Mini, ASI183MC Pro.
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John Baars
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Re: What could cause this?

#9

Post by John Baars »

It seems that slewing speed is set higher than the motors mechanically can.
If the same problem occurs without telescope and counterweights it is obvious.

Can you set the parameters of the motors?
If not slewing should be done no longer than the time it takes for the motors to shudder. Than stop a second and restart slewing.
Telescopes in Schiedam : SW 150mm Achromat F/5, SW Evostar 120ED F/7.5, Vixen 102ED F/9, OMC140 Maksutov F/14.3, SW 102 Maksutov F/13 on Vixen GPDX.
Eyepieces: Kitakaru, Eudiascopic, Panoptic, Morpheus, Nagler, Leica ASPH zoom, CZJena, Brandon, Parks, Fujiyama, Pentax XO5 and XO2.5 .
Binoculars: Kasai 2.3X40, AusJena 10X50 Jenoptem, Swarovski Habicht 7X42, Celestron Skymaster 15X70, Swift Observation 20X80.

Rijswijk Observatory Foundation telescopes: Astro-Physics Starfire 130 f/8 on NEQ6, 6 inch Newton on GP, C8 on NEQ6, Meade 14 inch SCT on EQ8, Lunt.

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