EAF Holder for old Celestron C8 - also max position issue

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josefmueller
Posts: 3
Joined: Wed Jan 29, 2020 9:33 am

EAF Holder for old Celestron C8 - also max position issue

Post by josefmueller » Wed Feb 05, 2020 8:58 am

I newly own a ZWO EAF to use for my very old Celestron C8 SCT. As i did not found a holder for the focuser - feather touch makes no sens for my application -. I made a holder with my 3D Plotter that fits my needs (see pictures below) as an idea for other users.

One thing about max position of ASCOM driver:
My C8 has a focuser range of a little more then 40 turns. In ASICAP, because of the native driver, the limitation seems to be 65000 steps, 5760 steps / turn - looks like a 16Bit number - and if I use the ASCOM with Sharpcap I can enter 230400 steps as the limit, but the limitation is still 65000 (around 12 turns). Also if a reach the limit (65000) the numbers for Zero and max position change to a strange value. If I return to the Zero position it still goes back to the Zero position.
As a wish: Maybe for the future there will be a driver and firmware update to to extend the limitations. Also some memory places where positions can be stored for different setups would be fine.
The EAF it self is a super tool for my application!!! Have fun, Josef
IMG_4755.jpg
C8 EAF Holder 1
IMG_4751.jpg
C8 EAF Holder 2
IMG_4757.jpg
C8 EAF Holder 3

Katherine.Tsai
Posts: 520
Joined: Fri Dec 07, 2018 10:24 am

Re: EAF Holder for old Celestron C8 - also max position issue

Post by Katherine.Tsai » Tue Feb 11, 2020 9:37 am

What is your EAF firmware version currently is?
You may try the latest EAF frimware,:)
https://astronomy-imaging-camera.com/so ... Update.zip

josefmueller
Posts: 3
Joined: Wed Jan 29, 2020 9:33 am

Re: EAF Holder for old Celestron C8 - also max position issue

Post by josefmueller » Wed Feb 12, 2020 4:39 pm

Attached the step files of the parts for CAD programs
:-)

download/file.php?mode=view&id=2894
Attachments
C8 EAF Holder.zip
(69.63 KiB) Downloaded 78 times

Katherine.Tsai
Posts: 520
Joined: Fri Dec 07, 2018 10:24 am

Re: EAF Holder for old Celestron C8 - also max position issue

Post by Katherine.Tsai » Thu Feb 13, 2020 7:53 am

Thanks for sharing.

josefmueller
Posts: 3
Joined: Wed Jan 29, 2020 9:33 am

Re: EAF Holder for old Celestron C8 - also max position issue

Post by josefmueller » Sat Feb 15, 2020 5:26 am

I did check the Firmware version. It is the latest one from the download side - FW 3.1.9 :-)

Katherine.Tsai
Posts: 520
Joined: Fri Dec 07, 2018 10:24 am

Re: EAF Holder for old Celestron C8 - also max position issue

Post by Katherine.Tsai » Mon Feb 17, 2020 7:54 am

After confirmation, It does not support bigger total steps.:(

AllenBow
Posts: 2
Joined: Thu Feb 06, 2020 7:27 pm
Location: new Zealand
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EAF Holder for old Celestron C8 also max position issue

Post by AllenBow » Sun Mar 01, 2020 3:09 am

Yet another fine piece of copper art from the house of Empty.

BUT


What about some 6 copper flanges to go with the copper tube?
Now that would be a great addition.

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