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Re: Ovision Spacer


Sep 15, 2008

 


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

#39692 Sep 15, 2008

Dear all,

as a G11 owner, I've been recently looking into upgrading mine with

the Ovision kit, mostrly thanks to the impressive and consistent

results that are being obtained by all those who have already decided

to take this step.



Just one thought, though. The Ovision kit comes in two flavors,

the "vanilla" one with just the worm + its housing, and the

"chocolate" one which also has a spacer for better past-meridian

imaging.



Because of the sheer difference in price, I've been wondering: is it

really worthwhile to go for the full-fledged upgrade kit?



And, how come such a "simple" spacer costs that much?



Thanks in advance

Emmanuele Sordini



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

#39693 Sep 15, 2008

Frankly, I would not go for the spacer unless your imaging setup is really

light and your image scale is low. I have always experienced a drastic

worsening of performances on the other side of the meridian.



However if it would work it would not be a ba thing at all!

ciao, gimmi



_____



Da: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

Per conto di esordini

Inviato: luned. 15 settembre 2008 11.49

A: Losmandy_users@yahoogroups.com

Oggetto: [Losmandy_users] Ovision spacer: is it worth its cost?







Dear all,

as a G11 owner, I've been recently looking into upgrading mine with

the Ovision kit, mostrly thanks to the impressive and consistent

results that are being obtained by all those who have already decided

to take this step.



Just one thought, though. The Ovision kit comes in two flavors,

the "vanilla" one with just the worm + its housing, and the

"chocolate" one which also has a spacer for better past-meridian

imaging.



Because of the sheer difference in price, I've been wondering: is it

really worthwhile to go for the full-fledged upgrade kit?



And, how come such a "simple" spacer costs that much?



Thanks in advance

Emmanuele Sordini













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



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

#45697 Apr 28, 2010

Hi Lynn



I have a 75mm spacer on my RA and find that it only gives useful

extension past the meridian on subjects lower down in the sky, the

problem is not the RA hitting the gearbox/motor etc but the OTA hitting

the legs, of course your OTA may not foul like mine 12" SCT does

(actually it is all the bits hanging off the back like CCD & off axis

guider, etc that cause the issue)



My next project is to also extend the DEC so as to allow some more

clearance, I must say that I no longer worry about the RA hitting the

gearbox/motor anymore which is why I consider this a worthwhile mod.



I have not considered any bearing issues, but I live near London so am

much further north than Rainer.



Regards Badger.





lynnhilborn wrote: > All this talk about the worm gear has me thinking about an order....but what about the RA Spacer ? I would love being able to drive my G11 through the meridian but I haven't seen any user reports about spacer being used here in north america. Rainer had a concern he voiced last year about weight on the needle....

> Any wisdom here ?

> Cheers

> Lynn

>

>

>

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

>

> Yahoo! Groups Links

>

>

>

>

>



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

#45703 Apr 28, 2010

Thanks for the response Badger. Is your spacer the Ovision one or is it home made ? I am pier mounted and am uusing a NP101is and C9.25 but no OAG, just camera and filter wheel.

I think the Ovision spacer is about 50mm, so I'd be interested in hearing about yours.

Thanks

Lynn --- In Losmandy_users@yahoogroups.com, David Mercer david.mercer@...> wrote:

>

> Hi Lynn

>

> I have a 75mm spacer on my RA and find that it only gives useful

> extension past the meridian on subjects lower down in the sky, the

> problem is not the RA hitting the gearbox/motor etc but the OTA hitting

> the legs, of course your OTA may not foul like mine 12" SCT does

> (actually it is all the bits hanging off the back like CCD & off axis

> guider, etc that cause the issue)

>

> My next project is to also extend the DEC so as to allow some more

> clearance, I must say that I no longer worry about the RA hitting the

> gearbox/motor anymore which is why I consider this a worthwhile mod.

>

> I have not considered any bearing issues, but I live near London so am

> much further north than Rainer.

>

> Regards Badger.

>

>

> lynnhilborn wrote:

> > All this talk about the worm gear has me thinking about an order....but what about the RA Spacer ? I would love being able to drive my G11 through the meridian but I haven't seen any user reports about spacer being used here in north america. Rainer had a concern he voiced last year about weight on the needle....

> > Any wisdom here ?

> > Cheers

> > Lynn

> >

> >

> >

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

> >

> > Yahoo! Groups Links

> >

> >

> >

> >

> >

>







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

#45704 Apr 28, 2010

Hi Lynn



Mine is home brew, as it is only a simple item I made my own, from

memory around 5.5" Diameter and 3" tall, as I said I will be making

another for the DEC, but when I do I will also reduce the size of the RA

spacer down to around 35-40mm (or whatever the actual size required for

the RA to just clear the motor/gearbox) and I will make the DEC one the

same size to match. As I said it is a very simple item and much too

expensive to buy the Ovision one no matter how nicely machined it may be.



The groove around the bottom half is for a east offset bias weight, not

shown is the weight, cable and arm that route the cable over the worm

blocks and down between the legs, weight is around 2.5KG, the whole kit

keeps the OTA offset to the east and was the most effective PE reducer I

have used to date and I thank Rainer for the idea (think of an idea to

make your G11 better and he has already done it) worth checking out his

pictures but I warn you, you will be jealous of his kit.



I have some pictures on the Gemini group link here:

xa.yimg.com/kq/groups/4109532/sn/1816247858/name/IMG_8067.jpg

Should the link not work it is under badgers little shop of horrors,

they were some pics I put up when someone wanted a pictorial description

on know how to take the mount apart to grease it, I just never got

around to removing them.



I will post a few updated pictures when I am able to get the kit out in

the next few weeks (recent back op means no lifting allowed)



Regards Badger.



lynnhilborn wrote: > Thanks for the response Badger. Is your spacer the Ovision one or is it home made ? I am pier mounted and am uusing a NP101is and C9.25 but no OAG, just camera and filter wheel.

> I think the Ovision spacer is about 50mm, so I'd be interested in hearing about yours.

> Thanks

> Lynn

> --- In Losmandy_users@yahoogroups.com, David Mercer david.mercer@...> wrote:

>

>> Hi Lynn

>>

>> I have a 75mm spacer on my RA and find that it only gives useful

>> extension past the meridian on subjects lower down in the sky, the

>> problem is not the RA hitting the gearbox/motor etc but the OTA hitting

>> the legs, of course your OTA may not foul like mine 12" SCT does

>> (actually it is all the bits hanging off the back like CCD & off axis

>> guider, etc that cause the issue)

>>

>> My next project is to also extend the DEC so as to allow some more

>> clearance, I must say that I no longer worry about the RA hitting the

>> gearbox/motor anymore which is why I consider this a worthwhile mod.

>>

>> I have not considered any bearing issues, but I live near London so am

>> much further north than Rainer.

>>

>> Regards Badger.

>>

>>

>> lynnhilborn wrote:

>>

>>> All this talk about the worm gear has me thinking about an order....but what about the RA Spacer ? I would love being able to drive my G11 through the meridian but I haven't seen any user reports about spacer being used here in north america. Rainer had a concern he voiced last year about weight on the needle....

>>> Any wisdom here ?

>>> Cheers

>>> Lynn

>>>

>>>

>>>

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

>>>

>>> Yahoo! Groups Links

>>>

>>>

>>>

>>>

>>>

>>>

>

>

>

>

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

>

> Yahoo! Groups Links

>

>

>

>

>



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

#45710 Apr 29, 2010

Hi lynn



I can tell by your enthusiasm that you did not look too closely at my

effort ;o) which I will improve upon on the Mk2 ones.



I am in the UK and guess that you are not? given your email provider,



Cost on the originals was around .24.00 for the Ali (this was for both

pieces) i was lucky to find some real cheap on eBay, postage added a few

ponds more and it took me about 3 days to turn down on my friends rather

underpowered 1/4HP old war production South Bend lathe .



The RA is as I said 5.5" (or thereabouts and any thickness you want,

though I would not want to go much over 3" and will require a central

hole of anything over 1" for the polar scope and 4x 8mm holes for the

fixings (you will need to buy longer Allen bolts to suit, as I could not

find Allen bolts in the original imperial size used here in the UK I

tapped my RA mounting points out to a metric size.



DEC is simpler than the RA as it just needs the 4 holes for the fixings

(again you will need to buy longer Allen bolts) One good thing to do

while you are at it get some longer bolts for the saddle as the

originals are not long enough, a couple of 1/4" deep fixings holding

around 30Kg of optics and cameras is not a firm fixing IMHO.



I can let you or anyone else have a sketch if needed. I do not use the

Yahoo mail system so if you need to contact me use

david.mercer@... or a message on here works well.



If you are in the UK then although I will not be getting around to

making new ones for my mount for at least a couple of months due to my

back, I would be happy to knock a couple up for you when I do. Just

forgive the finish, I spent my years in electronics and computers not

engineering ;o)



Regards Badger



lynnhilborn wrote: > Thank you for the information, Badger...much appreciated.

> Can I be so bold to ask if you might be interested in making an extra RA and Dec spacer that I might purchase from you ? Please contact me off line if you would be interested...lynnhilborn "at" yahoo "dot" ca

> Trust your recovery goes well...take care

> Cheers

> Lynn

>

>

> --- In Losmandy_users@yahoogroups.com, David Mercer david.mercer@...> wrote:

>

>> Hi Lynn

>>

>> Mine is home brew, as it is only a simple item I made my own, from

>> memory around 5.5" Diameter and 3" tall, as I said I will be making

>> another for the DEC, but when I do I will also reduce the size of the RA

>> spacer down to around 35-40mm (or whatever the actual size required for

>> the RA to just clear the motor/gearbox) and I will make the DEC one the

>> same size to match. As I said it is a very simple item and much too

>> expensive to buy the Ovision one no matter how nicely machined it may be.

>>

>> The groove around the bottom half is for a east offset bias weight, not

>> shown is the weight, cable and arm that route the cable over the worm

>> blocks and down between the legs, weight is around 2.5KG, the whole kit

>> keeps the OTA offset to the east and was the most effective PE reducer I

>> have used to date and I thank Rainer for the idea (think of an idea to

>> make your G11 better and he has already done it) worth checking out his

>> pictures but I warn you, you will be jealous of his kit.

>>

>> I have some pictures on the Gemini group link here:

>> xa.yimg.com/kq/groups/4109532/sn/1816247858/name/IMG_8067.jpg

>> Should the link not work it is under badgers little shop of horrors,

>> they were some pics I put up when someone wanted a pictorial description

>> on know how to take the mount apart to grease it, I just never got

>> around to removing them.

>>

>> I will post a few updated pictures when I am able to get the kit out in

>> the next few weeks (recent back op means no lifting allowed)

>>

>> Regards Badger.

>>

>> lynnhilborn wrote:

>>

>>> Thanks for the response Badger. Is your spacer the Ovision one or is it home made ? I am pier mounted and am uusing a NP101is and C9.25 but no OAG, just camera and filter wheel.

>>> I think the Ovision spacer is about 50mm, so I'd be interested in hearing about yours.

>>> Thanks

>>> Lynn

>>> --- In Losmandy_users@yahoogroups.com, David Mercer david.mercer@> wrote:

>>>

>>>

>>>> Hi Lynn

>>>>

>>>> I have a 75mm spacer on my RA and find that it only gives useful

>>>> extension past the meridian on subjects lower down in the sky, the

>>>> problem is not the RA hitting the gearbox/motor etc but the OTA hitting

>>>> the legs, of course your OTA may not foul like mine 12" SCT does

>>>> (actually it is all the bits hanging off the back like CCD & off axis

>>>> guider, etc that cause the issue)

>>>>

>>>> My next project is to also extend the DEC so as to allow some more

>>>> clearance, I must say that I no longer worry about the RA hitting the

>>>> gearbox/motor anymore which is why I consider this a worthwhile mod.

>>>>

>>>> I have not considered any bearing issues, but I live near London so am

>>>> much further north than Rainer.

>>>>

>>>> Regards Badger.

>>>>

>>>>

>>>> lynnhilborn wrote:

>>>>

>>>>

>>>>> All this talk about the worm gear has me thinking about an order....but what about the RA Spacer ? I would love being able to drive my G11 through the meridian but I haven't seen any user reports about spacer being used here in north america. Rainer had a concern he voiced last year about weight on the needle....

>>>>> Any wisdom here ?

>>>>> Cheers

>>>>> Lynn

>>>>>

>>>>>

>>>>>

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

>>>>>

>>>>> Yahoo! Groups Links

>>>>>

>>>>>

>>>>>

>>>>>

>>>>>

>>>>>

>>>>>

>>>

>>>

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

>>>

>>> Yahoo! Groups Links

>>>

>>>

>>>

>>>

>>>

>>>

>

>

>

>

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

>

> Yahoo! Groups Links

>

>

>

>

>







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

#45715 Apr 29, 2010

Hi Badger

I have every faith that your Mk II version will be top of the line...now that you have cracked the nut with MK I :)



Seriously, when you are up to another batch, please let me know as I would like to do all I can within reason to image past the meridian.



I will look for imperial bolts...are they used in the US made G11's ?

Haven't torn mine apart yet so don't know if its metric or imperial.



I guess the real trick in all this is to maintain the exact same surface regularity in the spacer as without.



Keep me in mind when you feel the spirit moving you to turn some Ali.



Cheers

Lynn



My webpage is www.nightoverontario.com





--- In Losmandy_users@yahoogroups.com, David Mercer david.mercer@...> wrote:

>

> Hi lynn

>

> I can tell by your enthusiasm that you did not look too closely at my

> effort ;o) which I will improve upon on the Mk2 ones.

>

> I am in the UK and guess that you are not? given your email provider,

>

> Cost on the originals was around .24.00 for the Ali (this was for both

> pieces) i was lucky to find some real cheap on eBay, postage added a few

> ponds more and it took me about 3 days to turn down on my friends rather

> underpowered 1/4HP old war production South Bend lathe .

>

> The RA is as I said 5.5" (or thereabouts and any thickness you want,

> though I would not want to go much over 3" and will require a central

> hole of anything over 1" for the polar scope and 4x 8mm holes for the

> fixings (you will need to buy longer Allen bolts to suit, as I could not

> find Allen bolts in the original imperial size used here in the UK I

> tapped my RA mounting points out to a metric size.

>

> DEC is simpler than the RA as it just needs the 4 holes for the fixings

> (again you will need to buy longer Allen bolts) One good thing to do

> while you are at it get some longer bolts for the saddle as the

> originals are not long enough, a couple of 1/4" deep fixings holding

> around 30Kg of optics and cameras is not a firm fixing IMHO.

>

> I can let you or anyone else have a sketch if needed. I do not use the

> Yahoo mail system so if you need to contact me use

> david.mercer@... or a message on here works well.

>

> If you are in the UK then although I will not be getting around to

> making new ones for my mount for at least a couple of months due to my

> back, I would be happy to knock a couple up for you when I do. Just

> forgive the finish, I spent my years in electronics and computers not

> engineering ;o)

>

> Regards Badger

>

> lynnhilborn wrote:

> > Thank you for the information, Badger...much appreciated.

> > Can I be so bold to ask if you might be interested in making an extra RA and Dec spacer that I might purchase from you ? Please contact me off line if you would be interested...lynnhilborn "at" yahoo "dot" ca

> > Trust your recovery goes well...take care

> > Cheers

> > Lynn

> >

> >

> > --- In Losmandy_users@yahoogroups.com, David Mercer david.mercer@> wrote:

> >

> >> Hi Lynn

> >>

> >> Mine is home brew, as it is only a simple item I made my own, from

> >> memory around 5.5" Diameter and 3" tall, as I said I will be making

> >> another for the DEC, but when I do I will also reduce the size of the RA

> >> spacer down to around 35-40mm (or whatever the actual size required for

> >> the RA to just clear the motor/gearbox) and I will make the DEC one the

> >> same size to match. As I said it is a very simple item and much too

> >> expensive to buy the Ovision one no matter how nicely machined it may be.

> >>

> >> The groove around the bottom half is for a east offset bias weight, not

> >> shown is the weight, cable and arm that route the cable over the worm

> >> blocks and down between the legs, weight is around 2.5KG, the whole kit

> >> keeps the OTA offset to the east and was the most effective PE reducer I

> >> have used to date and I thank Rainer for the idea (think of an idea to

> >> make your G11 better and he has already done it) worth checking out his

> >> pictures but I warn you, you will be jealous of his kit.

> >>

> >> I have some pictures on the Gemini group link here:

> >> xa.yimg.com/kq/groups/4109532/sn/1816247858/name/IMG_8067.jpg

> >> Should the link not work it is under badgers little shop of horrors,

> >> they were some pics I put up when someone wanted a pictorial description

> >> on know how to take the mount apart to grease it, I just never got

> >> around to removing them.

> >>

> >> I will post a few updated pictures when I am able to get the kit out in

> >> the next few weeks (recent back op means no lifting allowed)

> >>

> >> Regards Badger.

> >>

> >> lynnhilborn wrote:

> >>

> >>> Thanks for the response Badger. Is your spacer the Ovision one or is it home made ? I am pier mounted and am uusing a NP101is and C9.25 but no OAG, just camera and filter wheel.

> >>> I think the Ovision spacer is about 50mm, so I'd be interested in hearing about yours.

> >>> Thanks

> >>> Lynn

> >>> --- In Losmandy_users@yahoogroups.com, David Mercer david.mercer@> wrote:

> >>>

> >>>

> >>>> Hi Lynn

> >>>>

> >>>> I have a 75mm spacer on my RA and find that it only gives useful

> >>>> extension past the meridian on subjects lower down in the sky, the

> >>>> problem is not the RA hitting the gearbox/motor etc but the OTA hitting

> >>>> the legs, of course your OTA may not foul like mine 12" SCT does

> >>>> (actually it is all the bits hanging off the back like CCD & off axis

> >>>> guider, etc that cause the issue)

> >>>>

> >>>> My next project is to also extend the DEC so as to allow some more

> >>>> clearance, I must say that I no longer worry about the RA hitting the

> >>>> gearbox/motor anymore which is why I consider this a worthwhile mod.

> >>>>

> >>>> I have not considered any bearing issues, but I live near London so am

> >>>> much further north than Rainer.

> >>>>

> >>>> Regards Badger.

> >>>>

> >>>>

> >>>> lynnhilborn wrote:

> >>>>

> >>>>

> >>>>> All this talk about the worm gear has me thinking about an order....but what about the RA Spacer ? I would love being able to drive my G11 through the meridian but I haven't seen any user reports about spacer being used here in north america. Rainer had a concern he voiced last year about weight on the needle....

> >>>>> Any wisdom here ?

> >>>>> Cheers

> >>>>> Lynn

> >>>>>

> >>>>>

> >>>>>

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

> >>>>>

> >>>>> Yahoo! Groups Links

> >>>>>

> >>>>>

> >>>>>

> >>>>>

> >>>>>

> >>>>>

> >>>>>

> >>>

> >>>

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

> >>>

> >>> Yahoo! Groups Links

> >>>

> >>>

> >>>

> >>>

> >>>

> >>>

> >

> >

> >

> >

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

> >

> > Yahoo! Groups Links

> >

> >

> >

> >

> >

>







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