VintageBigBlue.org

 

Re: Ovision worm upgrade with GM-8


May 24, 2008

 


----------------------------

#37683 May 24, 2008

Anybody used the Ovision worm upgrade on a GM-8? If so I would would

like to hear what you think.



I'm tearing my hair out here trying to set up the gears and am looking

for other options.



Peter



----------------------------

#37712 May 30, 2008

I'm not an imager but I do have an Ovision down in the ol' kitchen. I

intend to install it and get a measurement. I am doing this with

someone who does a lot of imaging.



Last night we established the baseline PE of my year 2000 mount with

stainless steel worms (the old version worms) and so next time around

we can establish the new worm's effect.



Sorry I can't make it all happen at once between family, sky, and

other commitments.



regards

Greg N



--- In Losmandy_users@yahoogroups.com, "peterjchance"

peterchance@...> wrote: >

> Anybody used the Ovision worm upgrade on a GM-8? If so I would would

> like to hear what you think.

>

> I'm tearing my hair out here trying to set up the gears and am looking

> for other options.

>

> Peter

>



----------------------------

#37713 May 30, 2008

I forgot to mention that with 180 teeth on the worm gear of the G8

you'll get 1/2 the accuracy of a G11 with 360 teeth, according to

Ovision. So if you might get 4 arc second accuracy on a G11 you'll be

around 8 arc seconds with a G8. Not much of a way around that since

the machining of the head is one of the things that differentiates the

two mounts' respective prices.



regards

Greg N





--- In Losmandy_users@yahoogroups.com, "peterjchance"

peterchance@...> wrote: >

> Anybody used the Ovision worm upgrade on a GM-8? If so I would would

> like to hear what you think.

>

> I'm tearing my hair out here trying to set up the gears and am looking

> for other options.

>

> Peter

>



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