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RE: [Losmandy_users] Re: polar alignment and finder play


May 26, 2001

 


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

#4298 May 26, 2001

Greg wrote:




least to a limited degree, when the screws are down very tight.

Nonetheless life seem simpler when you loosen, adjust, then tighten.>>



Thanks for the reply. Previously, I have only loosened the left-right bolts with no problem. The manual only mentions loosening those and says nothing about the up-down bolts needing to be loosened. While attempting to setup tonight I tried again with the up-down bolts tight and it worked over a small range like I'd seen previously--go figure. Clouds rolled in and messed it all up anyway :^(



My Losmandy polar finder is free to rotate with the clutch tight, but has some 'play' in it. I rechecked the manual and it says nothing about a wavy washer. I know this has been discussed before, but was there supposed to be a wavy washer included to prevent any 'play?' What part # and from where could I get one?



Thanks again!



Mike Chapa



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

#4300 May 26, 2001

Mike,



The wavy or spring washer goes between the threaded ring

and the flange on the polar scope. It provides constant

pressure on the polar scope to keep the polar scope flange

firmly engaged with the flat surface on the back of the

RA clutch knob. If you are missing this washer then I would

suspect that this would cause your polar scope to have some

'play' in it.



I'm not sure where to get one of these washers but Losmandy

may have some or at least recommend where to obtain one.

If that doesn't work you might also check McMaster-Carr

www.mcmaster.com/ . Search for spring washers or

wave disc springs from their home page.



Hope this helps,



Bill F.





Mike Chapa wrote: >

> My Losmandy polar finder is free to rotate with the clutch tight,

> but has some 'play' in it. I rechecked the manual and it says

> nothing about a wavy washer. I know this has been discussed

> before, but was there supposed to be a wavy washer included to

> prevent any 'play?' What part # and from where could I get one?

>

>



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

#4303 May 26, 2001

Hello Bill,



I did not recieve a spring washer with my Polar Scope either. But, there is

a spring washer opposite of the flange that is "stock". Are there supposed

to be two spring washers? Are you supposed to move the existing "stock"

spring washer to the other side of the flange (the Polar Scope side)?



~ Jay P.





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

From: Bill Flanagan [mailto:bflanagan@...]

Sent: Saturday, May 26, 2001 4:44 PM

To: Losmandy_users@yahoogroups.com

Subject: RE: [Losmandy_users] Re: polar alignment and finder play





Mike,



The wavy or spring washer goes between the threaded ring

and the flange on the polar scope. It provides constant

pressure on the polar scope to keep the polar scope flange

firmly engaged with the flat surface on the back of the

RA clutch knob. If you are missing this washer then I would

suspect that this would cause your polar scope to have some

'play' in it.



I'm not sure where to get one of these washers but Losmandy

may have some or at least recommend where to obtain one.

If that doesn't work you might also check McMaster-Carr

www.mcmaster.com/ . Search for spring washers or

wave disc springs from their home page.



Hope this helps,



Bill F.





Mike Chapa wrote: >

> My Losmandy polar finder is free to rotate with the clutch tight,

> but has some 'play' in it. I rechecked the manual and it says

> nothing about a wavy washer. I know this has been discussed

> before, but was there supposed to be a wavy washer included to

> prevent any 'play?' What part # and from where could I get one?

>

>



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

#4305 May 26, 2001

Hi Jay,



My Polar Scope came fitted with the spring washer. It is

directly under the threaded ring (that is between the threaded

ring and the Polar Scope flange). The little plug in the

reticle illuminator hole kept the threaded ring on the scope

and as a result the spring washer did not have an opportunity

to wander off. I just got mine back in Feb, so its a

relatively new one. This is how it arrived from the factory.



I believe there should be only one polar scope spring washer

and it should go on the "outboard" side of the polar scope

flange (the side opposite the clutch knob). If it went

between the polar scope flange and the clutch knob it would

affect the alignment of the polar scope rotation axis with the

RA mechanical axis. You want the interface between the two

flat surfaces of the flange and clutch knob to be free of any

objects which could cause alignment errors.



There were some previous post that talked about the "trueness"

or "runout" of the clutch knob flat when you rotate the RA axis.

This will cause some misalignment of the polar scope rotation

axis with the RA mechanical axis and consequently affect polar

alignment. I haven't had a chance to check mine yet so I don't

know how bad this misalignment is with my scope. Some other

people have mentioned using O-rings on the polar scope to

keep in aligned with the RA axis hole. I guess in this case

you don't rely on the "trueness" of the clutch knob for

alignment (although you rely on the "trueness" of the hole

bored in the RA shaft). Someday I plan to compare the

O-ring trick with the standard "flange" alignment method

to see if it gives better results.



Regards,



Bill F.



> -----Original Message-----

> From: Jay E. Potts [mailto:jpotts@...]

> Sent: Saturday, May 26, 2001 8:57 PM

> To: Losmandy_users@yahoogroups.com

> Subject: RE: [Losmandy_users] Re: polar alignment and finder play

>

>

> Hello Bill,

>

> I did not recieve a spring washer with my Polar Scope either.

> But, there is a spring washer opposite of the flange that is

> "stock". Are there supposed to be two spring washers? Are you

> supposed to move the existing "stock" spring washer to the other

> side of the flange (the Polar Scope side)?

>

> ~ Jay P.

>

>







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

#4373 Jun 2, 2001

Guys,



Perhaps you could help me with my polar scope as I am quite

confused. I don't seem to have any "washers" The scope came from

Losmandy, but how can you tell if what its original source was? I

understand there are a couple different types. It has a small blue

battery pouch. I do have some trouble with it. The scope seems

loose unless you tighten clutch. If clutch is tightended, then scope

will not rotate. I have somehow managed to nail the alignment dead

on, from time to time despite these problems. Its has a black

anodized body and ring, similar to mount, and a loose ring that

screws onto polar axis, but no "washers" at least that I know of.



Kevin

--- In Losmandy_users@y..., "Bill Flanagan" bflanagan@u...> wrote:

> Hi Jay,

>

> My Polar Scope came fitted with the spring washer. It is

> directly under the threaded ring (that is between the threaded

> ring and the Polar Scope flange). The little plug in the

> reticle illuminator hole kept the threaded ring on the scope

> and as a result the spring washer did not have an opportunity

> to wander off. I just got mine back in Feb, so its a

> relatively new one. This is how it arrived from the factory.

>

> I believe there should be only one polar scope spring washer

> and it should go on the "outboard" side of the polar scope

> flange (the side opposite the clutch knob). If it went

> between the polar scope flange and the clutch knob it would

> affect the alignment of the polar scope rotation axis with the

> RA mechanical axis. You want the interface between the two

> flat surfaces of the flange and clutch knob to be free of any

> objects which could cause alignment errors.

>



> There were some previous post that talked about the "trueness"

> or "runout" of the clutch knob flat when you rotate the RA axis.

> This will cause some misalignment of the polar scope rotation

> axis with the RA mechanical axis and consequently affect polar

> alignment. I haven't had a chance to check mine yet so I don't

> know how bad this misalignment is with my scope. Some other

> people have mentioned using O-rings on the polar scope to

> keep in aligned with the RA axis hole. I guess in this case

> you don't rely on the "trueness" of the clutch knob for

> alignment (although you rely on the "trueness" of the hole

> bored in the RA shaft). Someday I plan to compare the

> O-ring trick with the standard "flange" alignment method

> to see if it gives better results.

>

> Regards,

>

> Bill F.

>

>

> > -----Original Message-----

> > From: Jay E. Potts [mailto:jpotts@a...]

> > Sent: Saturday, May 26, 2001 8:57 PM

> > To: Losmandy_users@y...

> > Subject: RE: [Losmandy_users] Re: polar alignment and finder play

> >

> >

> > Hello Bill,

> >

> > I did not recieve a spring washer with my Polar Scope either.

> > But, there is a spring washer opposite of the flange that is

> > "stock". Are there supposed to be two spring washers? Are you

> > supposed to move the existing "stock" spring washer to the other

> > side of the flange (the Polar Scope side)?

> >

> > ~ Jay P.

> >

> >



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

#4381 Jun 2, 2001

Hi Kevin,



In my case, there were two washers associated with the

polar scope. The spring washer on the polar scope

(between the polar scope flange and threaded ring)

and the now "famous" flat washer that arrived in a

Torrington Bearing box (although I understand it

sometimes comes taped to the polar scope).



I understand that the flat washer may be required

when you do not have DSC encoders on your mount.

In this case the flat washer goes directly

under the clutch knob (the mount side of the clutch

knob). It may be required to space the clutch

knob slightly back and provide a little more clearance

inside the RA shaft to keep polar scope from

bottoming out. It sounds like this problem could be

preventing your polar scope from rotating when you

tighten the clutch. I don't have the dimensions of

the flat washer handy but maybe someone else on the list

can get you the dimensions. You could also contact

Losmandy for the details on the flat washer.



Bill F.

> -----Original Message-----

> From: _kevin1231@... [mailto:_kevin1231@...]

> Sent: Saturday, June 02, 2001 9:52 AM

> To: Losmandy_users@yahoogroups.com

> Subject: [Losmandy_users] Re: polar alignment and finder play

>

>

> Guys,

>

> Perhaps you could help me with my polar scope as I am quite

> confused. I don't seem to have any "washers" The scope came from

> Losmandy, but how can you tell if what its original source was? I

> understand there are a couple different types. It has a small blue

> battery pouch. I do have some trouble with it. The scope seems

> loose unless you tighten clutch. If clutch is tightended, then scope

> will not rotate. I have somehow managed to nail the alignment dead

> on, from time to time despite these problems. Its has a black

> anodized body and ring, similar to mount, and a loose ring that

> screws onto polar axis, but no "washers" at least that I know of.

>

> Kevin

>

> --- In Losmandy_users@y..., "Bill Flanagan" bflanagan@u...> wrote:

> > Hi Jay,

> >

> > My Polar Scope came fitted with the spring washer. It is

> > directly under the threaded ring (that is between the threaded

> > ring and the Polar Scope flange). The little plug in the

> > reticle illuminator hole kept the threaded ring on the scope

> > and as a result the spring washer did not have an opportunity

> > to wander off. I just got mine back in Feb, so its a

> > relatively new one. This is how it arrived from the factory.

> >

> > I believe there should be only one polar scope spring washer

> > and it should go on the "outboard" side of the polar scope

> > flange (the side opposite the clutch knob). If it went

> > between the polar scope flange and the clutch knob it would

> > affect the alignment of the polar scope rotation axis with the

> > RA mechanical axis. You want the interface between the two

> > flat surfaces of the flange and clutch knob to be free of any

> > objects which could cause alignment errors.

> >

>

> > There were some previous post that talked about the "trueness"

> > or "runout" of the clutch knob flat when you rotate the RA axis.

> > This will cause some misalignment of the polar scope rotation

> > axis with the RA mechanical axis and consequently affect polar

> > alignment. I haven't had a chance to check mine yet so I don't

> > know how bad this misalignment is with my scope. Some other

> > people have mentioned using O-rings on the polar scope to

> > keep in aligned with the RA axis hole. I guess in this case

> > you don't rely on the "trueness" of the clutch knob for

> > alignment (although you rely on the "trueness" of the hole

> > bored in the RA shaft). Someday I plan to compare the

> > O-ring trick with the standard "flange" alignment method

> > to see if it gives better results.

> >

> > Regards,

> >

> > Bill F.

>







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