Picture of the ways

Purty.

"Pete C." fired this volley in news:4c4853fa$0 $26723$ snipped-for-privacy@unlimited.usenetmonster.com:

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

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 news:2q6dnXOhmeOG-tXRnZ2dnUVZ snipped-for-privacy@giganews.com:

Sweet.

LLoyd

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 news:2YCdnSOrcKc-79XRnZ2dnUVZ snipped-for-privacy@giganews.com:

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" fired this volley in news:Xns9DBD82872BE5Dlloydspmindspringcom@216.168.3.70:

Shoulda sed: "maybe better"...

LS

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.

Nice! You got a good one!

Enjoy, DoN.

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

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

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

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

chromed after

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

i

centered, there

here. Most of

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

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

i

centered, there

orthogonality in all

here. Most of

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

I pretty much agree with that.

i