Jump to content

We politely request that members refrain from discussing politics and/or the Brexit debate on East Midlands Stargazers. Let's keep it to the topic at hand... Clouds. ☁️

  • Join the online East Midlands astronomy club today!

    Test

Sign in to follow this  
JamesAstro2002

HEQ5 Pro DEC Clicking Noises

Recommended Posts

JamesAstro2002

Hi people,

So I've been a bit of a fool and managed to drop my entire HEQ5 Pro mount head on my foot (Ouch). I was carrying it upstairs 'attached' to the tripod so I could make some adjustments to the DEC axis since there was a slight amount of play. So I set the tripod down and bam, the head rolled off and landed right on my foot. Silly me didn't realise the head screw wasn't done up all the way!

 

So I gave it a test to make sure it was okay, got the hand controller out and moved it in both RA and DEC and it seemed fine.

 

Then I decided to proceed with what I was going to do in the first place, adjust the worm gear engagement for DEC since there was a bit of play. After following astro baby's guide, I can hear this awful clicking sound when rotating the DEC axis a certain direction. Here is a video showing what I mean: https://1drv.ms/v/s!Av4AJlmi-oXUiRto2oGY22Q6eJc-.

 

Any help on this would be greatly appreciated, I do hope I haven't messed it up too bad.

 

Regards,

James.

Share this post


Link to post
Share on other sites
Sheila

Only person I know on here would be Graham, i am sure he will notice this post and come back to you

Share this post


Link to post
Share on other sites
Graham

Hi James.

I am assuming this clicking started after you adjusted the backlash.

It sounds like you have adjusted it too much and the motor is stalling on a single tight spot on the worm gear.

Back the adjustment off a very small amount and try again to see if it stops.

A small amount of backlash is normal for these mounts

Share this post


Link to post
Share on other sites
JamesAstro2002

Hi Graham,

Yes - I didn't notice any noises after dropping it, only after I adjusted the worm gear.

I'll give that a try now.

 

Thanks for the quick response 🙂

Edited by JamesAstro2002
Spelling mistake

Share this post


Link to post
Share on other sites
JamesAstro2002

So I backed off the adjustment a bit, now that vibration and other noise has gone - but still the clicking noise continues.

Share this post


Link to post
Share on other sites
Graham

Back it off some more until there is a quite a bit of backlash and then try it.

If it still clicks you might have damaged something.

Can you do a longer video of it clicking so I can try to asses what is going on.

I need to see a close up of the motor end of the belt whilst it is running

Edited by Graham

Share this post


Link to post
Share on other sites
Graham

Your drive belt has a lump on it.

Every time it reaches the motor pulley you get the click.

The belt is riding too high on the pulleys.

You need to move the guide wheel down a touch so the belt rides in the center of the pulleys.

 

In fact before you get into that just take the belt off and turn it around.

Edited by Graham

Share this post


Link to post
Share on other sites
tuckstar

Hi James,welcome to the forum. I hope you get your mount sorted, if Graham

doesn't know, I don't know who would.

Why don't you pop a post in the welcome section and tell us a little about yourself, of course only if you want to.

Again, welcome aboard and enjoy the forum.

Andy

Share this post


Link to post
Share on other sites
JamesAstro2002

Okay Graham, I'll try that now. Thanks for the help so far.

Share this post


Link to post
Share on other sites
JamesAstro2002
14 minutes ago, tuckstar said:

Hi James,welcome to the forum. I hope you get your mount sorted, if Graham

doesn't know, I don't know who would.

Why don't you pop a post in the welcome section and tell us a little about yourself, of course only if you want to.

Again, welcome aboard and enjoy the forum.

Andy

Thanks Andy

Share this post


Link to post
Share on other sites
JamesAstro2002

I've just taken the belt off, flipped it around and gave it a test - no more clicking! I didn't move the guide wheel down, since I don't know how, is there a screw on it somewhere? But if there isn't any more clicking I guess I don't need to.

 

 

Share this post


Link to post
Share on other sites
JamesAstro2002

Thanks Ron, so am I! That's just one of the many reasons this hobby surpasses others for me, the community is full of well informed, kind people who are willing to help or just have a general chat. 

Share this post


Link to post
Share on other sites
Graham

There you go. 👍

You can sort your backlash out now.

If you want to know how to drop the guide wheel let me know and I will walk you through it.

It involves a bit of work because the motor will have to come out.

Share this post


Link to post
Share on other sites
JamesAstro2002

Thanks a lot for that Graham.

I'm out under the clear skies at the moment, testing, all seems to be normal. But I'm still experiencing what i'm assumming is excessive backlash in the DEC axis. After doing a calibration in PHD2, I always get the message 'little south movement detected'. Also, when dithering, it takes the DEC axis an age to settle, eventually it seems to average out over time, settling quickly. Any idea on how to resolve this? I'm just assuming it's a large amount of DEC backlash but i'm not sure how to fix it. And Should I move this question to a new thread?

Share this post


Link to post
Share on other sites
Graham

Removing backlash is a trial and error process. 

The amount of backlash will vary depending on where the scope is pointing. 

The accuracy of the pinion wheel isn't that great so creating the differences. 

You just have to find the sweet spot where there is minimal backlash and the mount doesn't lock up when slewing. 

Just to complicate things further it is also affected by temperature and moisture. 

Still all good fun. 

Share this post


Link to post
Share on other sites
JamesAstro2002

Yeah. I had a play with it today and managed to get rid of any play in the gear, with no luck ups whilst doing a complete 360 degree slew in the DEC axis, so fingers crossed it's better. 

Share this post


Link to post
Share on other sites
JamesAstro2002
10 minutes ago, Graham said:

0.2 is pretty dam good for an HEQ 5

Great. Just started an imaging run and all seems to be even better after the adjustments I've made, thanks again for your help, Graham.

Share this post


Link to post
Share on other sites
JamesAstro2002

Thought I'd post an update here and thanks to the help of Graham, my mount is now performing much better than before. Just in time for my new dslr Ha filter that I managed to try out the other night.

https://1drv.ms/u/s!Av4AJlmi-oXUiSCuG0s9-dl5d5A5?e=7Uqh2Z

That was 15 x 10 minute exposures, with a large dither between all subs which now settles on time also. 

 

Can't wait to start HaRGB now, but of course it'll be cloudy for the foreseeable future, lol. 

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.   Restore formatting

  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.

Loading...
Sign in to follow this  

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.