Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.



Dropped EQ3 and damage the geers teeth

Recommended Posts

I have unfortunately broken part of the gear box of my mount when I accidentally let It slipped and dropped, from the decking to hard floor. 

It has cut the teeth of both of the gears and bent one of the shaft.

With the helps from NSAS society, They managed to take them apart and tried to find out what replacement parts I need.

They think I need to replace two gears and one shaft. 

I attached a picture of them. Not sure if the replacement of these parts the motor will work properly.

I have emailed the dealer now waiting for a reply from their supplier. 

Here is my model 

Skywatcher EQ3 Pro GOTO Mount & Tripod

Please can anyone advise what I should do ? 







Share this post

Link to post
Share on other sites

Oh dear, that's most unfortunate! However it's not the end of the World and those two gears are not the most important in the overall drive train. Both gears seem to be the same size and I think they mesh in the same plane. You may be "lucky" and find there is enough of the damaged teeth left to still engage whilst turning. You would have to orientate the gears so that the damaged parts do not meet. The bent shaft probably can't be straightened adequately, if you could send it to me, or any machinist you might know, and I could cut the damaged part off and graft on a new piece. This could be a fix untill you can get some replacements. I have a EQ3 Pro mount, I'll have a close look at it tomorrow. 

  • Like 3

Share this post

Link to post
Share on other sites

That looks nasty!  If you can get replacement parts then everything should work OK when reassembled

Share this post

Link to post
Share on other sites

Hi Pete if you look carefully, the other dish has lost quite a lot teeth, the motor drive one direction ok, but not the other. Do you think the mould, I mean the body will be ok ??? I dont want to buy a relacement part if the mount has also been damage ?

Share this post

Link to post
Share on other sites

As long as there is some of the tooth width the gear should mesh reasonably well. I have some spare drive gears from a Vixen motor, I'll check to see if they are the same as the Skywatcher ones.   :icon_biggrin:

  • Like 1

Share this post

Link to post
Share on other sites

@Winniewsp. I've had a look at our EQ3 PRO today and the Vixen gears are different. I also found that the gear arrangement was different than I had expected so my previous advice won't apply. I'm afraid that the only real way forward is likely to be replacement parts. Sorry to have raised your hopes.  :sad:

  • Like 1

Share this post

Link to post
Share on other sites

I have a similar problem gears have been sheared after mounting a heavy Newtonian telescope.  Does anyone know were it is possible to get replacement parts. 

Share this post

Link to post
Share on other sites

Email Skywatcher's UK distributor at info@opticalvision.co.uk

explaining the issue.  Warning though, if they do not stock these then you're in for a long wait for news ones to arrive.

  • Thanks 1

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By Lee_P
      Lots of astro kit for sale! Payment via bank transfer or PayPal (buyer to pay fees). Reasonable offers considered.
      1. Sky-Watcher Evostar 80ED DS-Pro Outfit with auto focuser upgrade -- £350
      Comes with diagonal, 28mm 2” eyepiece, 2" to 1.25" eyepiece adapter, dovetail, tube rings, SkyWatcher Auto Focuser, HitecAstro DC Focus Controller USB, metal case. Approx. cost new: £562. Buyer to collect from central Bristol, or buyer to arrange for a courier. Note: doesn’t come with a finder / guider, but I have some available (listed below).
      Main items similar to: 
      2. Sky-Watcher .85x Reducer/Flattener for ED80 -- £120 inc. recorded delivery to mainland UK 
      3. Sky-Watcher Skymax 150 PRO -- £300
      Comes with diagonal, 28mm 2” eyepiece, and dovetail. Note: doesn’t come with a finder / guider, but I have some available (listed below). Buyer to collect from central Bristol, or buyer can arrange for a courier.
      It's an earlier version of this: https://www.firstlightoptics.com/maksutov/skywatcher-skymax-150-pro.html
      Works well with items 7, 8, and 9.
      4. Sky-Watcher 9x50 and QHY5 mono guidescope -- £150 inc. recorded delivery to mainland UK
      Includes T thread adapter attaching the QHY5 to the finderscope. Also includes kit to convert into a regular optical finderscope. 
      5. Sky-Watcher 9x50 Finderscope -- £30 inc. delivery to mainland UK
      6. Sky-Watcher EQ3 PRO mount -- £220
      In pretty good condition, and includes the handset for full goto functionality. Unboxed. Buyer to collect from central Bristol, or buyer can arrange for a courier.
      It's an earlier version of this: https://www.firstlightoptics.com/skywatcher-mounts/skywatcher-eq3-pro-synscan-goto.html
      7. Astrozap Dew Heater Tape, 6" 'scope -- £30 inc. delivery to mainland UK
      8. Astrozap Flexible Dew Shield for Skymax 150 -- £20 inc. delivery to mainland UK
      9. StarSharp Bahtinov Focus Mask 150mm Maksutov -- £10 inc. delivery to mainland UK
      Items 1 and 4:

      Item 2:

      Items 3, 5, 7:

      Item 5:

      Item 6:

      Item 8:

      Item 9:

    • By gutaker
      Hi guys, it's my first post here, so Hello!
      My synscan goto upgrade started to act like in this video of mine SynScan GOTO Skipping after being disassembled for few weeks in the closet. There were no such problems before.
      When it slews at rates above x3 everything is fine and smooth but as soon as it starts tracking at x3, it skips steps or something like that.
      My setup is eq3-2 on alu and SW 150/750 with Canon 700D attached.
      Thanks in advance for any clues or ideas!
    • By Phillips6549
      Complete beginner question regarding using this mount.
      When I have tried to set up and align the mount , the goto targeting is off by many degrees.  Here's what I do - can someone tell me what I'm doing wrong!?
      With the power off:
      Align the tripod and mount to North and, with the clutches released, set the declination to my latitude (52deg 28' N). and the mount in the weights-down home position.
      Lock the clutches and fine tune the alignment on Polaris using the mechanical adjustments on the mount.
      Turn the power on:
      Set up the date, time and location, elevation etc. in the handset (noting the American Date format and Longitude first (set to W 1deg 48')
      DST = Yes
      Select 1 Star align
      Pick a star, I usually try Procyon or Betelguese depending on the time.
      The scope slews to vaguely the right direction but actually nowhere near.  It can take 2 or 3 minutes of manual slewing to centre the star in the eyepiece.  Finishing, of course, with an up and right movement.
      Finally, press Enter to complete the alignment ==> Alignment Successful says the handset optimistically.  
      Now from the object menu pick another target.  Try, say, Polaris which was where I started and ... nowhere near it.   It's the same regardless of the selected target.
      I have tried 2 star alignment and 3 star alignment, a factory reset before starting,  but nothing seems to work.   Once i'm lined up on a target the mount tracks nicely - it just won't go where I want it to!
      Not yet at my wits end but - Help!  
    • By cjdawson
      Hi everyone.
      A friend has an EQ3 Goto mount, I think it's the Sky-watcher one.    Currently, I know nothing about them, except that he's having issues getting it to work.  To the point that he's getting so frustrated with it he's seriously starting to thinking about throwing the mount away.
      He's described what's happening to me.    What he's saying is that the mount never points to the place where he's asked it to point.    He's saying that say the scope is supposed to point towards something in Orion, it'll end up pointing somewhere on the other side of the sky.     He's also said that it doesn't seem to want to track past a certain point in RA.
      I'd thought rather than simply jump in and try to help him out and get just as confused,  I was wondering if there's some check list of common EQ3 faults that I could work through to see if we can solve the issue.
      Once thing I do know is that he's running the mount from a dedicated tracer battery, so it maybe safe to assume that the power supply is good.   (althought it's something I'm going to double check as I don't want to miss anything)
    • By Stub Mandrel
      34 2-minute subs, no darks. Exif says 6c so the sensor was probably somewhere between -15 and -20C!
      Begging for a few more hours!

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.