http://igor.chudov.com/projects/Brid...arage/ways.jpg

Ignoramus24043 wrote:

http://igor.chudov.com/projects/Brid...arage/ways.jpg

Purty.

"Pete C." fired this volley in news:4c4853fa$0
:

Purty.

REAL purty.

But I have a slight (only slight) precaution for that.

Check everywhere you can see. If that machine was heavily used for small
parts production, there may be a very small area of the ways actually
worn.

My old Cincy #2 has visible fish scale, still, and there's no evidence
that it's ever been scraped. But the fish scale disappears in the four
inches or so either side of center. And that's where the X feed gets
"easy", too.

But you may have gotten REAL lucky, and obtained a machine that had been
recently and completely scraped and trued, and not even used much after
that. Boy, that'd be COOL.

LLoyd

On 2010-07-22, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
"Pete C." fired this volley in news:4c4853fa$0
:

Purty.

REAL purty.

But I have a slight (only slight) precaution for that.

Check everywhere you can see. If that machine was heavily used for small
parts production, there may be a very small area of the ways actually
worn.

My old Cincy #2 has visible fish scale, still, and there's no evidence
that it's ever been scraped. But the fish scale disappears in the four
inches or so either side of center. And that's where the X feed gets
"easy", too.

But you may have gotten REAL lucky, and obtained a machine that had been
recently and completely scraped and trued, and not even used much after
that. Boy, that'd be COOL.

Lloyd, my feeling on this is that this condition is a combination of
three things:

1) A really good automatic lubrication system. Surfaces slide on
oil, and not on each other.

2) The mill was used at Motorola to make prototypes of cell phone
parts. They machined only aluminum and black plastic. They also did
not use it for day to day production.

3) The fact that ways are very well covered (though the cover needs
replacement, I will buy machine cover bellows at McMaster-Carr).

4) I moved the table as far out along Y as I could and the ways looked
just as good throughout. That's what is on the picture.

i

Ignoramus24043 fired this volley in
:

4) I moved the table as far out along Y as I could and the ways looked
just as good throughout. That's what is on the picture.


Sweet.

LLoyd

On 2010-07-22, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus24043 fired this volley in
:

4) I moved the table as far out along Y as I could and the ways looked
just as good throughout. That's what is on the picture.


Sweet.

So, assuming that the screws are in a similar condition, what do you
think is the accuracy that it is good for? 0.0005?

Ignoramus24043 fired this volley in
:

So, assuming that the screws are in a similar condition, what do you
think is the accuracy that it is good for? 0.0005?

Maybe less, but that depends on a lot besides the mechanical accuracy of
the platform. Everything inside gets into the act.

LLoyd

"Lloyd E. Sponenburgh" lloydspinsidemindspring.com fired this volley in
. 3.70:

Maybe less,

Shoulda sed: "maybe better"...

LS

Ignoramus24043 wrote:

On 2010-07-22, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus24043 fired this volley in
:

4) I moved the table as far out along Y as I could and the ways looked
just as good throughout. That's what is on the picture.


Sweet.

So, assuming that the screws are in a similar condition, what do you
think is the accuracy that it is good for? 0.0005?

Have you found the original accuracy specifications in the original
manuals?

Assuming the machine is a wear free as it appears, and you do your
backlash and pitch error measurement and compensation, 0.0005" doesn't
seem unreasonable.

On 2010-07-22, Ignoramus24043 wrote:
http://igor.chudov.com/projects/Brid...arage/ways.jpg

Nice! You got a good one!

Enjoy,
DoN.

--
Remove oil spill source from e-mail
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---

Ignoramus24043 wrote:

http://igor.chudov.com/projects/Brid...arage/ways.jpg

If only my knee ways looked that good. My table ways do, rescaped and hard chromed after
a rebuild before I bought it. Knee has issues so I try to work inside the quill range.


Wes
--
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller

Ignoramus24043 wrote:

On 2010-07-22, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus24043 fired this volley in
:

4) I moved the table as far out along Y as I could and the ways looked
just as good throughout. That's what is on the picture.


Sweet.

So, assuming that the screws are in a similar condition, what do you
think is the accuracy that it is good for? 0.0005?

Depends. How tight (well fitted) are the gibs? As your table moves from centered, there
is a rocking motion that affects Z for sure. Actually, gibs affect orthogonality in all
planes. I'd get a stare using that word at work so I got a smile typing it here. Most of
us know what I mean even if I didn't spell it right.

Wes
--
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller

On Thu, 22 Jul 2010 09:17:09 -0500, Ignoramus24043
wrote:

http://igor.chudov.com/projects/Brid...arage/ways.jpg


That is a NICE machine!!!

Kudos!!!!


Gunner

One could not be a successful Leftwinger without realizing that,
in contrast to the popular conception supported by newspapers
and mothers of Leftwingers, a goodly number of Leftwingers are
not only narrow-minded and dull, but also just stupid.
Gunner Asch

On Thu, 22 Jul 2010 10:43:23 -0500, Ignoramus24043
wrote:


2) The mill was used at Motorola to make prototypes of cell phone
parts. They machined only aluminum and black plastic. They also did
not use it for day to day production.


And thats the key to everything right there.

You did Very Well!


Gunner

One could not be a successful Leftwinger without realizing that,
in contrast to the popular conception supported by newspapers
and mothers of Leftwingers, a goodly number of Leftwingers are
not only narrow-minded and dull, but also just stupid.
Gunner Asch

On 2010-07-22, Wes wrote:
Ignoramus24043 wrote:

http://igor.chudov.com/projects/Brid...arage/ways.jpg

If only my knee ways looked that good. My table ways do, rescaped and hard chromed after
a rebuild before I bought it. Knee has issues so I try to work inside the quill range.

Chroming is almost like a miracle. Chroming with good lubrication and
ways covered, is nothing short of that.

i

On 2010-07-22, Wes wrote:
Ignoramus24043 wrote:

On 2010-07-22, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus24043 fired this volley in
:

4) I moved the table as far out along Y as I could and the ways looked
just as good throughout. That's what is on the picture.


Sweet.

So, assuming that the screws are in a similar condition, what do you
think is the accuracy that it is good for? 0.0005?

Depends. How tight (well fitted) are the gibs? As your table moves from centered, there
is a rocking motion that affects Z for sure. Actually, gibs affect orthogonality in all
planes. I'd get a stare using that word at work so I got a smile typing it here. Most of
us know what I mean even if I didn't spell it right.

I do not know, I think that I will spend one day figuring out accuracy
limits on this machine. Backlash, orthogonality and all that.

i

On 2010-07-23, Gunner Asch wrote:
wrote:
2) The mill was used at Motorola to make prototypes of cell phone
parts. They machined only aluminum and black plastic. They also did
not use it for day to day production.


And thats the key to everything right there.

You did Very Well!

Thanks. I will email the seller of this mill and will mail him a
little thank you note.

i

On Fri, 23 Jul 2010 07:59:58 -0500, Ignoramus7608
wrote:

On 2010-07-22, Wes wrote:
Ignoramus24043 wrote:

On 2010-07-22, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus24043 fired this volley in
:

4) I moved the table as far out along Y as I could and the ways looked
just as good throughout. That's what is on the picture.


Sweet.

So, assuming that the screws are in a similar condition, what do you
think is the accuracy that it is good for? 0.0005?

Depends. How tight (well fitted) are the gibs? As your table moves from centered, there
is a rocking motion that affects Z for sure. Actually, gibs affect orthogonality in all
planes. I'd get a stare using that word at work so I got a smile typing it here. Most of
us know what I mean even if I didn't spell it right.

I do not know, I think that I will spend one day figuring out accuracy
limits on this machine. Backlash, orthogonality and all that.

i
But wait till you get the electronics running properly..

Based solely on the picture of the way you showed us..I dont think you
have much to worry about for quite a while on ortho or much anything
else..including backlash.

They were tough mills, hard to wear out..and that picture and its
history says you have a very long way to go before you have to start
worrying bout much of anything.

If it bothers you..loosen the gibs on Z, put a tenths indicator on the
column and MANUALLY..with your hands..Push against the end of the table,
and read the indicator..then Pull on the end of the table. If it
moves...thats your backlash. Ill bet it doesnt move.

Tighten the gibs back up and you are done screwing around. For a long
time.. you WONT be cutting stuff to 10ths. Nor will there be much reason
to. A half thousand is at most...what you will be worried about..and
generally a grand will do it.

Gunner, CNC tech

One could not be a successful Leftwinger without realizing that,
in contrast to the popular conception supported by newspapers
and mothers of Leftwingers, a goodly number of Leftwingers are
not only narrow-minded and dull, but also just stupid.
Gunner Asch

On 2010-07-23, Gunner Asch wrote:
But wait till you get the electronics running properly..

Based solely on the picture of the way you showed us..I dont think you
have much to worry about for quite a while on ortho or much anything
else..including backlash.

They were tough mills, hard to wear out..and that picture and its
history says you have a very long way to go before you have to start
worrying bout much of anything.

If it bothers you..loosen the gibs on Z, put a tenths indicator on the
column and MANUALLY..with your hands..Push against the end of the table,
and read the indicator..then Pull on the end of the table. If it
moves...thats your backlash. Ill bet it doesnt move.

Tighten the gibs back up and you are done screwing around. For a long
time.. you WONT be cutting stuff to 10ths. Nor will there be much reason
to. A half thousand is at most...what you will be worried about..and
generally a grand will do it.


I pretty much agree with that.

i