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Re: New Ovision worm results


Jan 17, 2009

 


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

#41136 Jan 17, 2009

I installed my Ovision worm in my G11 back when outside temperature was

quite warm. Now that it is very cold, I noticed that when gently moving the

weight bar form side to side, it far exceeded the 2mm or so that Ovision

recommends. I adjusted the block by "feel" and to a setting that once again

corresponded to the 2mm arm movement.



When I run Pempro for 10 cycles with PEC OFF, it produces PE of +2.7 / -2.6

RMS 0,656. After programming the mount, with PEC ON, the results are +0.8 /

-0.7 RMS 0,568.



So it does seem it needs a "tweak" between seasons, but it only takes 10mins

and with those results I am not complaining!



But I am curious if by adjusting correctly in the summer, then placing a

heater strap beside the worm in the winter would avoid this process??



Sounds silly but hey.whatever works!!







Adrien Richardson











[Non-text portions of this message have been removed]



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

#41137 Jan 17, 2009

That's something I experience with my GM-8 with the Losmandy bearing

blocks. There is no reason the Ovision bearing block would behave

differently (just a question of thermal expansion). But since the

Ovision design is a sinle block one, the adjustment will not suffer

from the well known misalignment problem of the original bearings.



Regards



Claudio

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



--- In Losmandy_users@yahoogroups.com, "Adrien Richardson"

biplane@...> wrote: >

> I installed my Ovision worm in my G11 back when outside temperature was

> quite warm. Now that it is very cold, I noticed that when gently

moving the > weight bar form side to side, it far exceeded the 2mm or so that Ovision

> recommends. I adjusted the block by "feel" and to a setting that

once again > corresponded to the 2mm arm movement.

>

> When I run Pempro for 10 cycles with PEC OFF, it produces PE of +2.7

/ -2.6 > RMS 0,656. After programming the mount, with PEC ON, the results are

+0.8 / > -0.7 RMS 0,568.

>

> So it does seem it needs a "tweak" between seasons, but it only

takes 10mins > and with those results I am not complaining!

>

> But I am curious if by adjusting correctly in the summer, then placing a

> heater strap beside the worm in the winter would avoid this process??

>

> Sounds silly but hey.whatever works!!

>

>

>

> Adrien Richardson

>

>

>

>

>

> [Non-text portions of this message have been removed]

>



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

#41140 Jan 17, 2009

Adrien - thanks for the post on the Ovision worm results. I will be

ordering an Ovision worm for my GM8 and will post the before and after

results.



Clear skies,

Dave





-----Original Message-----

From: Losmandy_users@yahoogroups.com

[mailto:Losmandy_users@yahoogroups.com]On Behalf Of Adrien Richardson

Sent: Saturday, January 17, 2009 2:49 AM

To: Losmandy_users@yahoogroups.com

Subject: [Losmandy_users] New Ovision worm results





I installed my Ovision worm in my G11 back when outside temperature was

quite warm. Now that it is very cold, I noticed that when gently moving

the

weight bar form side to side, it far exceeded the 2mm or so that Ovision

recommends. I adjusted the block by "feel" and to a setting that once

again

corresponded to the 2mm arm movement.



When I run Pempro for 10 cycles with PEC OFF, it produces PE of +2.7

/ -2.6

RMS 0,656. After programming the mount, with PEC ON, the results are +0.8

/

-0.7 RMS 0,568.



So it does seem it needs a "tweak" between seasons, but it only takes

10mins

and with those results I am not complaining!



But I am curious if by adjusting correctly in the summer, then placing a

heater strap beside the worm in the winter would avoid this process??



Sounds silly but hey.whatever works!!



Adrien Richardson



[Non-text portions of this message have been removed]













[Non-text portions of this message have been removed]



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

#41151 Jan 17, 2009

I have heard on Yahoo! extremeastronomy of people heating their worms

but I don't know how they do it.



One year I was using the standard G11 tripod in teh snow and snow got

up the hollow legs. bringing it back into the garage I decided to run

hot water over the legs to melt the snow. I ran some water over the

leg for about two minutes and looked down. The water had frozen all

around the leg!



Aluminum is very heat conductive and you've got considerable mass in

these mounts. So I'm not sure that the standard Kendrick strip

putting out ten or twenty watts is going to do the trick. If you have

something more powerful in mind, heating the worm might work.

Otherwise I think you just might end up shoving some molecules around.



regards

greg n







--- In Losmandy_users@yahoogroups.com, "Adrien Richardson"

biplane@...> wrote: >

> I installed my Ovision worm in my G11 back when outside temperature was

> quite warm. Now that it is very cold, I noticed that when gently

moving the > weight bar form side to side, it far exceeded the 2mm or so that Ovision

> recommends. I adjusted the block by "feel" and to a setting that

once again > corresponded to the 2mm arm movement.

>

> When I run Pempro for 10 cycles with PEC OFF, it produces PE of +2.7

/ -2.6 > RMS 0,656. After programming the mount, with PEC ON, the results are

+0.8 / > -0.7 RMS 0,568.

>

> So it does seem it needs a "tweak" between seasons, but it only

takes 10mins > and with those results I am not complaining!

>

> But I am curious if by adjusting correctly in the summer, then placing a

> heater strap beside the worm in the winter would avoid this process??

>

> Sounds silly but hey.whatever works!!

>

>

>

> Adrien Richardson

>

>

>

>

>

> [Non-text portions of this message have been removed]

>







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