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.

Coastliner

Skywatcher AZ-EQ5GT DEC wobble/play

Recommended Posts

Hi All,

If I grab hold of the puck on my AZEQ5 I can make it rock back and forth by a degree or so (DEC axis), there appears to be no play in the RA axis. Does anyone else have this? Can it be adjusted out?

Thanks,

Neil.

Share this post


Link to post
Share on other sites

I have the AZ-EQ6 & yes there was some slop, which I've managed to remove by adjusting worm tensions & ensuring that the puck's 3 allen keyed bolts are done up....

Share this post


Link to post
Share on other sites

Hi Neil

Not quite, I'm afraid. My AZEQ5 has significant slop in the RA axis instead. Which affects how well the mount can be used in Alt-Az mode. Went back to the supplier who discussed with SkyWatcher. We even sent a video, but SW said it was supposed to be like that and not a fault. If anyone knows a way to reduce movement on that axis as well, I'd certainly be very grateful. Perhaps I'll have to have a go at the worms one day, when I'm feeling brave.

The Dec axis is not so bad on mine and looseness in that one is a bit easier to overcome by slightly unbalancing the scope. But that doesn't work with the RA axis, which is vertical in Alt-Az mode, of course. I generally use it in EQ mode now, where I can unbalance things to help (probably not good for the long term health of the motors ...). But that spoils the point of the mount, somewhat.

It wasn't for the slop it would be a great mount, but as it is I can't honestly recommend it. Which is a shame.

Gordon

Share this post


Link to post
Share on other sites

Thanks for the replies guys. I only use mine in EQ. I might pluck up the courage to have a look inside sometime to adjust the play, but in the meantime I'll use back-heavy balance on the tube so that it sits hard on one end of the slop. I've just had the mount back fro Darkframe where it had the Stellardrive mod done, I had hoped that they would take the slop out for me.

Share this post


Link to post
Share on other sites

Surely Darkframe should have sorted that out as part of their Stellardrive mod. I'd get in contact with them and ask them to fix it.

Dave

Share this post


Link to post
Share on other sites

Yup. Just done so. Also, strangely, since they upgraded the firmware on the handset it will slew to solar system objects but will not slew to stars, the handset says "slewing" but nnothing moves and nothing happens when any buttons are pressed. The only way out is to power-cycle the mount. Everything works via EQMOD/ Stellarium, and also works with the handset from my EQ3. As an ex-computer engineer I know that f/w upgrades can go wrong, so this is not Darkfame's fault, just bad luck.

  • Like 1

Share this post


Link to post
Share on other sites
7 hours ago, Coastliner said:

As an ex-computer engineer I know that f/w upgrades can go wrong, so this is not Darkfame's fault, just bad luck.

It should have been tested after the upgrade though surely? I would certainly go back to the on the backlash issue.

Share this post


Link to post
Share on other sites

Hi Neil @Coastliner

Just wondering if youd had  a successful resolution? I'm thinking of getting either an AZ-EQ5 Pier mount tripod, or an EQM-35 ... main drivers being portability and ability to store things/carry equipment up and down stairs , but worried about the wobble if using, say, an EdgeHD 8.

Best wishes

Sanj

Share this post


Link to post
Share on other sites

Hi Sanj, I ended up sending my AZ-EQ5GT mount to Darkframe for their Stellardrive upgrade, they fixed the DEC wobble as well, and the mount is a lot better overall. There are instructions on how to clear the DEC play on the net if you are ok with small mechanics. It just involves re-aligning the worm gear to remove the play.

  • Like 1

Share this post


Link to post
Share on other sites

Thanks Neil, I ended up getting a great deal on the EQM-35. , figured it's a cheap entry point from which to upgrade, and quite portable. Trouble is it's still in its box as there have been no clear skies since purchase!

Share this post


Link to post
Share on other sites
On 17/06/2019 at 00:45, Sanjio said:

Thanks Neil, I ended up getting a great deal on the EQM-35. , figured it's a cheap entry point from which to upgrade, and quite portable. Trouble is it's still in its box as there have been no clear skies since purchase!

In fact I took he EQM back and now have an AZEQ5 which seems of much higher quality. Mounted it and didn't notice any wobble, but did notice that I could rotate the DEC and RA even with clutches locked (loaded with 8 inch SCT and weights, balanced)...perhaps that's normal, or perhaps I need to tighten the clutches more?

Edited by Sanjio

Share this post


Link to post
Share on other sites

If the clutches are tightened properly you shouldn’t be able to move it. Mine locks up quite solidly.

  • Like 1

Share this post


Link to post
Share on other sites
9 hours ago, johninderby said:

If the clutches are tightened properly you shouldn’t be able to move it. Mine locks up quite solidly.

Thanks, will try again. To you have a apply a fair bit of force? Perhaps I'm being too gentle!

Share this post


Link to post
Share on other sites

 I found that the clutches on my AZEQ5 needed to be clamped down very hard to stop it moving. I guess the Freedom Find should mean it retains calibration even if moved manually? Probably not relevant for imaging though.

I did also have slop in the DEC axis on mine which I found annoying at high power.

 

  • Like 1

Share this post


Link to post
Share on other sites

You will also find that if you tighten the clutches too hard you will have hard time releasing them. I find that if you apply enough pressure on the clutches to stop it moving around when you nudge it that is enough. I don't screw them down so hard that I cannot alter the position at all.

  • Like 1

Share this post


Link to post
Share on other sites

The main problem is if you adjust everything @ room temperature & go out on a very cold night. You will find

everything tightens , up as I have found out. Trying to adjust everything on a cold night , is not much fun ,but that is what

I did on my CG-5 . Worth the effort.

  • Like 1

Share this post


Link to post
Share on other sites

Thanks all. Sounds like tightening them up enough I prevent accidental nudges is probably tight enough. Ready for the next clear night !

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By Vroobel
      Hi, 
      As my GoTo is successfully finished (some cosmetic issues remain) I shoud focus my attention on planets' positions. I have proper source of information: fantastic book "Astronomical Algorithms" by Jean Meeus, thus I will sort the planets soon. But planets are not a challenge for me at this moment, they are just something obvious to do in my list. 
      I have another idea and ambitious plan for next project within the year: locating and tracking the ISS to be able to make a video of its fly, not only transition. 
      Similarly to other objects, I need some equations. I'm pretty sure they are available somewhere, because plenty websites or apps offer showing current position of the ISS. 
      I will use this topic for sharing a progress ot the project. 
    • By Carboncrazy
      Can anyone help? I'm pretty much a novice at this astronomy stuff but loving the steep learning curve. I started by using camera lenses modified to use an eyepiece but after much debate, deliberation and saving up, I have finally bought my first proper telescope. Unfortunately I now have a problem.
      Last year I bought a second hand Synscan EQ5 mount which has worked perfectly each time I have used it. I  used it about a month ago for the first time with the new scope (last time we had a clear sky). Everything worked as it should. At 2 am I parked the scope, dismantled everything and put it away. Nothing was dropped, snagged or got wet.
      The forecast said we might get a clear sky last night. Anticipating this I got the mount on the bench, stripped, cleaned, polished and greased the DEC axis plain bearings (hoping this might help with guiding). When finished I connected the motor controller and handset and switched on. I was greeted with the following messages: INITIALISING then CAUTION BOTH AXES NO RESPONSE. If I press enter and carry on through the menus, then everything appears to be as it should except no motors run. I have tried everything I can think of and would be very grateful of advise or suggestions. These are things I have tried, so far:
      Factory reset
      Different power supply. I have been using a motorbike battery which is giving 13.5V constantly when I switch on. I have tried two other batteries with a 2A charger connected.
      Continuity tested the cables from the plugs that go onto the motherboard of the controller all the way to the motors.
      I made up the  RJ45 and RJ12 diagnostic cables suggested in the manual and the handset appears to be ok.
      Removed the motors from the mount to make sure that they turn freely.
      Replaced the RJ45 cable from the handset to the controller.
      Examined the motherboard for dry joints and damaged components.
      Assembled everything in the tripod to make sure that the earthing tab on the controller made no difference.
      I now feel that the problem is the controller motherboard but logic tells me that it was the mount I disassembled, so the fault should lie there. Is there anyone who has had the same problem or who has the same system that could help me diagnose the problem. I'm in North Shropshire but happy to travel to anyone who could help. Unfortunately I don't know anyone with the same mount.
       
       
       
    • By Coastliner
      Hi All,
      I'm trying to balance my AZ-EQ5 as perfectly as I can, all was going well (all 3 axes) until I added the Polemaster. As this is off-axis it applies torque to the RA causing the axis to rotate until the Polemaster is hanging at the lowest point.
      I need to couterbalance this, any ideas how?
      or,
      Do I need to counterbalance this? Am I being too picky?
      I have considered taking the arm off and gluing the Polemaster onto the on-axis point of the top cover, but again, is this overkill?
      Thanks,
      Neil.
    • By joecoyle
      Hi
      I've set my scope up on it's pier in my ROR observatory, done a few drift aligns and started to take some images. 
      I've noticed a 'quite' regular dip in my DEC line on several nights. 
      Would anyone be able to have a quick scan of my log and offer any insight?
      Could it be backlash? Could it be something with each rotation of the gears? Faulty tooth? 
      It is quite regular, although not always, and always in the same direction.
      It doesn't seem to be adversely affecting imaging yet, but I've not tried anything too taxing.
      Thanks
      Joe
       
      PHD2_GuideLog_2018-09-23_200940.txt
    • By alexbb
      Recently I opened my AZ-EQ5 mount for adjusting and greasing.
      I did not find any complete tutorial for this nor worm or bearings dimensions. I plan to replace some of those if I have the chance.
      Meanwhile, I will add some pics of the disassembly process.
      Open the plastic top case. Please excuse the USB hub attached, I did not remove that.

        Pull out the cable connectors. Put the top case with the controller board aside.

        The bolt inside the green circle can help you remembering or adjusting the belt tension. Loosen down the RA motor screws. Remove the belt. Unscrew the bolts. Remove the motor.

        The bolts inside the green circles can help you remember and adjust the worm distance to the RA main gear. Remove the bolts holding the worm case.

        Parts: RA main gear, worm case.

        Remove the screws holding the encoder board. You get access to the nut holding the worm in place. Remove this too.

        Remove the bolts inside the driving gear attached to the worm. Sorry, not the best pic.

        You can now proceed to push out the worm and the bearings. No pics for this, sorry.
      The bearings are 688Z, 16mm outer diameter, 8mm inner diameter, 5mm width.
      Worm dimensions measured with the caliper: 69mm, 36mm.
       
      Hope someone finds this useful.
      I'd be interested if the worm is identical to the ones used in the HEQ5.
      Clear skies!
      Alex
×
×
  • Create New...

Important Information

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