TECH: Adjusting EOS

[Guest]

Archived from groups: rec.games.pinball (More info?)

So the only supid question is the one not asked, right?

Googling for an hour all I can find is "Adjust the EOS".
What is the best way?

I see three:

1) Shim the eos itself. I think this is the best way to preserve the
contact geometry where the contacts are normally open but not a concern
when they are opening.

2) Adjust the size of the cam actuating the eos. Seems like a pain and
not precise.

3) Bending the eos tabs. Some seem hard to bend and others have dual
construction that seem to prevent bending.

What is the concensus?



Jack James

 

[Guest]

Archived from groups: rec.games.pinball (More info?)

Bending is the appropriate method of adjusting on EOS switch. These
things do not operate in a linear arc, there should be an x and y
component to the opening and closing. This is what produces the self
cleaning wiping action you want them to have. You bend the leaf as
near the shim block as possible.

K2

 

[Guest]

Archived from groups: rec.games.pinball (More info?)

normally closed or normally open...either way, you should leave the switch
mounted in it's OEM location.
I prefer to have the switch open/close within the last few degrees (5?) of
rotation. Something you need to play with by bending the contacting leaf
blade.

"John W. James" <ebd@jackdds.com> wrote in message
news:C0xze.88863$mx5.28600@fe08.lga...
> So the only supid question is the one not asked, right?
>
> Googling for an hour all I can find is "Adjust the EOS".
> What is the best way?
>
> I see three:
>
> 1) Shim the eos itself. I think this is the best way to preserve the
> contact geometry where the contacts are normally open but not a concern
> when they are opening.
>
> 2) Adjust the size of the cam actuating the eos. Seems like a pain and
> not precise.
>
> 3) Bending the eos tabs. Some seem hard to bend and others have dual
> construction that seem to prevent bending.
>
> What is the concensus?
>
>
>
> Jack James
>

 

[Guest]

Archived from groups: rec.games.pinball (More info?)

John W. James wrote:

> So the only supid question is the one not asked, right?
>
> Googling for an hour all I can find is "Adjust the EOS".
> What is the best way?
>
> I see three:
>
> 1) Shim the eos itself. I think this is the best way to preserve the
> contact geometry where the contacts are normally open but not a concern
> when they are opening.
>
> 2) Adjust the size of the cam actuating the eos. Seems like a pain and
> not precise.
>
> 3) Bending the eos tabs. Some seem hard to bend and others have dual
> construction that seem to prevent bending.
>
> What is the concensus?
>
>
>
> Jack James
>

Hire someone who knows what they are doing!

 

[Don]

Archived from groups: rec.games.pinball (More info?)

John,

If you want to save money, go to www.marvin3m.com/fix and do some basic
reading. It will give you most of the answers you are looking for.
Another good option might be for you to invest in a copy of Bernard
Kamaroff's book titled: "Pinball Machine Care and Maintenance". You
can find it many places including from www.gameroommagazine.com. It
has good basic information that is easy to understand and will help you
get started in the basics of the machine. Then call up Steve at
Pinball Resource and order a basic set of tools including a switch
adjustment tool. They are cheap and will last you forever.

- Don

John W. James wrote:
> So the only supid question is the one not asked, right?
>
> Googling for an hour all I can find is "Adjust the EOS".
> What is the best way?
>
> I see three:
>
> 1) Shim the eos itself. I think this is the best way to preserve the
> contact geometry where the contacts are normally open but not a concern
> when they are opening.
>
> 2) Adjust the size of the cam actuating the eos. Seems like a pain and
> not precise.
>
> 3) Bending the eos tabs. Some seem hard to bend and others have dual
> construction that seem to prevent bending.
>
> What is the concensus?
>
>
>
> Jack James

 

[Guest]

Archived from groups: rec.games.pinball (More info?)

There is a special tool for this. I think it's called a "point bender" or
"contact adjustment tool" You can make your own by taking a small screw
driver and cutting off the blade end leaving the small round shaft emphasis
on SMALL not in length but in diameter!!
Then Cut a 1/8th inch slot using a hack saw into the shaft it shoud be about
3/8ths inch in depth. (The slot is straight across the
diameter of the shaft through the center)
You might ask Steve Young at PBR (pinball resource) see the FAQ for contact
info if he has them. All the EM guys
will know what they are (usually it's a set of 4 pieces of metal/aluminum
round shafts configured in vaarious angles).
For EOS the one angle is fine. When working on an EM you need other angles
to get at stuff.

Now the slot you cut will fit right over the single leaf (contact) you wish
to adjust. You do so near the base of the leaf stack.
If you turn it gently a bit it will put more bend/tension in that direction.
I had you cut it 1/8 inch wide to accomodate the
thick blade adjuster that is on some so it will fit over the 2nd contact and
that adjuster.

Typically EOS should be adjusted such that when the flipper opens them there
is about 1/8th inch of space. No more than 1/4 inch!
Exceeding this amount works but will cause excess travel of the contact
which will result in fast weakening the blade and it will break.

When you watch the contacts close you should see about 1/32 inch of travel
as they touch. This causes the wiping / self cleaning
action mentioned by one of the posters.

Hope that helps!
Dallas...


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"John W. James" <ebd@jackdds.com> wrote in message
news:C0xze.88863$mx5.28600@fe08.lga...
> So the only supid question is the one not asked, right?
>
> Googling for an hour all I can find is "Adjust the EOS".
> What is the best way?
>
> I see three:
>
> 1) Shim the eos itself. I think this is the best way to preserve the
> contact geometry where the contacts are normally open but not a concern
> when they are opening.
>
> 2) Adjust the size of the cam actuating the eos. Seems like a pain and
> not precise.
>
> 3) Bending the eos tabs. Some seem hard to bend and others have dual
> construction that seem to prevent bending.
>
> What is the concensus?
>
>
>
> Jack James
>