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Equipment Discussions >> Refractors

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Quarkroscoe
newbie


Reged: 01/08/13

Loc: Wisconsin, USA
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: bilgebay]
      #5614283 - 01/09/13 06:54 PM Attachment (12 downloads)

What an elegant solution. I have just started my search for a remote focusing solution for my TOA-130. My TOA was built in 2004 and the 4" focuser is a bit different from what I see in your pics (see attached). I have looked at JMI and RoboFocus and your solution is by far the best. It also uses the fine focus shaft and the JMI does not. I have heard about a lot of slipage issues with the RoboFocus. By the looks of the attached pic, do you think your solution would work on my TOA?

Cheers,
Dennis
www.RoscoeSkies.com


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bilgebay
Post Laureate
*****

Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: Quarkroscoe]
      #5614788 - 01/10/13 12:52 AM

Thank you Dennis. My answer will be "yes" to your question

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bilgebay
Post Laureate
*****

Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: Denimsky]
      #5614820 - 01/10/13 01:43 AM

Quote:

Quote:

In the case of FSQ, 5 micron steps are a bit coarse.




Hi Sedat,

Why do you say 5 micron steps are coarse even though it is way below the CFZ ?




Maybe it was a bit early to utter my judgement on this. However, we have a very limited CFZ to start with. Let's say the temperature has dropped 1 degree and this means that your tube will contract by 13 microns. With this setup you have the ability to move either 10 or 15 microns, not 13. This may look unimportant at first look but if you consider all you have is 30 microns only, it is a bit tight to fit in.

Additionally, I have heard from other users that there is a hysteresis problem with the Micro Touch system. So, more steps could help me to land in this tiny CFZ slot with better precision.

I need to do some testing on the accuracy of the system. I hope to find the time for this before the end of this month.

Clear skies.


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Quarkroscoe
newbie


Reged: 01/08/13

Loc: Wisconsin, USA
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: bilgebay]
      #5615534 - 01/10/13 01:25 PM Attachment (22 downloads)

Hi Sadat,

Looks like I am going forward with your solution. In reviewing your pics, I see two different gears with respect to what is mounted on the fine focus shaft (see your attached photos). The brass gear looks more like the one shown in the Micro Touch Manual (see attached). What am I missing here?

Cheers,
Dennis


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bilgebay
Post Laureate
*****

Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: Quarkroscoe]
      #5615597 - 01/10/13 01:59 PM

Dennis, the brass gear and the bushing/sleeve is just there to show the original Starizona delivery for the MSM20 motor. Has nothing to do with this mod other than to demonstrate the sleeve technique is used by Starizona in this kind of application. Sorry for the confusion.

Hope it is clear now.

Sedat


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Quarkroscoe
newbie


Reged: 01/08/13

Loc: Wisconsin, USA
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: bilgebay]
      #5615657 - 01/10/13 02:39 PM

NP, so the gear used with the MSM30 motor (shown in your solution) is that much larger than the brass gear used in the MSM20. Got it!

In an old post you said that you were going to post drawings and dimension. Is that post still around? Thanks.

Cheers,
Dennis


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bilgebay
Post Laureate
*****

Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: Quarkroscoe]
      #5615678 - 01/10/13 02:51 PM Attachment (7 downloads)

Dennis, I will post the drawing as soon as I get to my other computer. Please bear with me.

This is the gear that should be used with MSM30 motor



It was like the following before the modification, that is without the bronze hub




Edited by bilgebay (01/10/13 03:22 PM)


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Quarkroscoe
newbie


Reged: 01/08/13

Loc: Wisconsin, USA
Re: FSQ106EDXIII - Micro Touch adaptation [Re: bilgebay]
      #5615762 - 01/10/13 03:48 PM

Sedat, take your time with the drawings. I am just glad that there is such an elegant solution available. My Paramount MX mount just arrived and I have a lot of work to do with it. My observatory will not see first light until spring, but I am building everything indoors first before moving it all outside.

Cheers,
Dennis


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bilgebay
Post Laureate
*****

Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: Quarkroscoe]
      #5616818 - 01/11/13 08:21 AM

Hey Dennis, this is great news. Congratulations on your new mount!

Cheers

Sedat


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bilgebay
Post Laureate
*****

Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: bilgebay]
      #5631159 - 01/19/13 08:37 AM

Here is the promised dimension drawing:



I had to redo it on the photo. For some strange reason, the original drawing is lost





Hope this helps

Clear skies


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bilgebay
Post Laureate
*****

Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: bilgebay]
      #5633538 - 01/20/13 04:44 PM

The followers of this thread might also want to have a look at the new thread I have started in the equipment forum.

I have tested the accuracy of the Micro Touch system in combination with the FSQ's stock focuser and put 2 videos together to demonstrate the results.

Sedat


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dflipp
newbie


Reged: 01/03/06

Loc: Central Arkansas
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: bilgebay]
      #5633553 - 01/20/13 04:53 PM

Sedat, thanks for taking the time to document this!

-Dan


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bilgebay
Post Laureate
*****

Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: FSQ106EDXIII - Micro Touch adaptation new [Re: dflipp]
      #5635193 - 01/21/13 03:20 PM

You are welcome Dan.

Clear skies

Sedat


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