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Ioptron CEM40 hits tripod leg.

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#1 Greg6498

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Posted 31 May 2020 - 10:11 AM

Really need help with this issue! My Ioptron CEM40 mount is hitting the leg of my tripod when pointed near the meridian. On my old AVX mount I could adjust the RA and DEC limits, but I don't see any setting for this on the CEM40. I changed the Meridian Treatment setting to meridian flip but I don't remember if that was the default setting or not. Do any of you have an answer on how to fix this problem?



#2 milkychris

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Posted 31 May 2020 - 11:10 AM

What is your Set Position Limit value?



#3 OldManSky

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Posted 31 May 2020 - 11:20 AM

Is the *mount* hitting the tripod leg, or is the *telescope* ON the mount hitting it?

 

As milkychris said, check your "Set Position Limit" setting -- in your case, set it to 0.  That tells the mount how far to go beyond the meridian before doing the Meridian Treatment behavior.  



#4 eyeoftexas

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Posted 31 May 2020 - 11:24 AM

If that doesn't solve the problem, or it's the telescope hitting the tripod iOptron makes an extension pier for the CEM40 (https://www.ioptron....duct-p/8031.htm).


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#5 Greg6498

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Posted 31 May 2020 - 11:36 AM

Is the *mount* hitting the tripod leg, or is the *telescope* ON the mount hitting it?

 

As milkychris said, check your "Set Position Limit" setting -- in your case, set it to 0.  That tells the mount how far to go beyond the meridian before doing the Meridian Treatment behavior.  

The scope is hitting the tripod leg. It’s touching just enough to stop the tracking.



#6 Greg6498

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Posted 31 May 2020 - 11:37 AM

What is your Set Position Limit value?

Where do I find that number to check it?



#7 milkychris

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Posted 31 May 2020 - 12:17 PM

Where do I find that number to check it?

Look at section 5.4.7 in the manual on page 29 https://www.ioptron....EM40_Manual.pdf


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#8 stryker66

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Posted 31 May 2020 - 11:20 PM

I use to have that issue with 140mm refractor so I put more weight since I was still under payload limit, this enable me to push the scope further so it is less overhang



#9 Sasho_Panov

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Posted 01 June 2020 - 08:52 AM

I own CEM40EC for almost a year and one (perhaps the only one) thing that is annoying with this mount is the problem you described. I am using it with 115mm refractor.

The only solution in my opinion i iOptron MiniPier extension that I have ordered. From my calculations, it will rise the mount to a afe distance from the tripod legs.

Sasho


Edited by Sasho_Panov, 01 June 2020 - 03:51 PM.

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#10 johnsoda

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Posted 01 June 2020 - 11:24 AM

I had this problem with long refractors in my CEM60. I got the pier extension, and I’ve never had the problem since.

#11 OldManSky

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Posted 01 June 2020 - 08:50 PM

It's a very common problem with all Equatorial mounts on tripods.  Nothing unique about it in regard to iOptron mounts.

And yeah, pier extensions work very well.



#12 Greg6498

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Posted 01 June 2020 - 09:49 PM

I own CEM40EC for almost a year and one (perhaps the only one) thing that is annoying with this mount is the problem you described. I am using it with 115mm refractor.
The only solution in my opinion i iOptron MiniPier extension that I have ordered. From my calculations, it will rise the mount to a afe distance from the tripod legs.
Sasho



#13 Greg6498

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Posted 01 June 2020 - 09:50 PM

I just ordered the mini pier extension today! That should solve it! Thanks!
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