diagrams of gantry as promised

[aboard_epsilon]

Yes Jim.... remembering the mars lander I can see what you mean. :-)
all the best...mark

[toolmakerjim]

my brother brought a milk carton home from the cape had a picture of the one they lost with the question "Have you seen me" like the missing children. what a hoot...jim

[JRouche]

[speedy]

Damn! just when I had redrawn it myself
cheers, Ken
posted 12-04-2004 08:12 PM
--------------------------------------------------------------------------------
i really like it when you draw something in inches and the throw in the 10 mm thing here and 5 mm there.
did you ever work for Lockheed~Martin?,,,jim

PS 175mm sounds more impressive than 7"?

[This message has been edited by speedy (edited 12-05-2004).]

[ibewgypsie]

FOR the bologna cuts: I find it easier to make a paper wrap on the tube held together w/scotch tape, find the upper and lower distance to the top beginning and the bottom ending.

Make circles at each point around tube (use another paper wrap if needed to get square marks on paper), center with level Clamp a level make a top mark, make a bottom mark. Make a scribe line on the paper top center to bottom center. Remove wrap, cut with scissors just the top part. NOW, YOu have something to mark the expensive tubing with. Wrap it back around it aligning the bottom like a pipe wrap square and tape for each tube. Mark tube, cut tube grind chamfer lightly.

Harder to describe than to do. Sorry guys I guess that is why my older brother is a college professor and I work for a living. He can describe but not do.

(I do exhaust pipe like this too.) Looks good hanging out from under a rod.


------------------
David Cofer, Of:
Tunnel Hill, North Georgia

[This message has been edited by ibewgypsie (edited 12-05-2004).]

[aboard_epsilon]

what you have just said dave is impossible to understand .ive no idea what you mean.
I cut them this way
First I cut them to the steepest angle I could on my power hacksaw.
Then I carefully put one in my milling vise on my bridgeport.
I tilted it in the vise until the end that was cut was at the right angle (202 dgree's ish) to be face milled with an endmill.
Then I put lumps of steal here and there to suport it and act as an alignment jig for the next tube ...doing it this way made sure every tube was machined at the same angle.
it does not matter what angle you cut them as long as its near 202.5 degree
but THEY ALL MUST BE EXACTLEY THE SAME.
all the best....mark

[ibewgypsie]

ANY steamfitters in the "HOUSE"???

They use pipe wraps everyday. It is a thick waxed cardboard with angles on the sides. You put it around the pipe and get it square by the bottom edge. THEN, Mark the angle on the pipe. bottom start center and top angle.

Not sure how much a pipe wrap costs? they may be a buck or a hundred. I have always used thick paper and made my own way.

David

[aboard_epsilon]

ps if you have an extra long endmill which i didnt and i was pushed for time.
the vise can be turned on the table to the right angle and you can mill with the side of the endmill.....
endmill must have over 2.5 inches of flute length to do it this way.
all the best....mark

[ibewgypsie]

http://wrightbros.com/pdf/contour.pdf

Once again, a picture is worth a thousand words.. check out the WRAP-A-ROUND

I ain't no steamfitter before all you toughguys want to sic* the business agent in a grievance procedure.

You can do the same thing with a piece of paper..

*'deleted because of bad taste.. *

See lower in the page there..

I gotta go.

David

[This message has been edited by ibewgypsie (edited 12-05-2004).]

[rollin45]

"Fitter" here, Lo.#19
"Wrap-arounds" can be bought at most welding supply houses for, depending on size, 5 to 10 bucks. They are stiff enough and thick enough to use for drawing the various cut lines. As Dave mentions they have angles marked on the surface, but in practice the angles should be layed out with squares,rules etc. Even so, a guy gets plenty of grinder time.
rollin'