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: Can anyone help finding the center coordinates of two rotating tubes?
: Can anyone help finding the center coordinates of two rotating tubes? -- 94jetta~~	Post Reply	Top of thread	Engineering Forum

Posted by: randykimball ® 05/25/2009, 02:04:54 Author Profile eMail author Edit

Hello and welcome, I'm having trouble understanding your question. Are you trying to align the ends of two tubes in alignment? If so here are some methods: 1. machine a spud to fit the insides of both tubes and slide them over the spud. 2. attach an indicator to one tube and rotate it (the indicator)around the end of the other until the indicator "indicates" that your have them centered. 3. mike around the tubes and find the high and low points of diameters. mark those areas and match the two tubes to have the same rotational high and low sides. then bridge the two tubes with a straight piece of angle iron while you weld or attach them to the stand. 4. place snug fitting spuds (made of about anything) with tiny centered holes into each end of both tubes. Place a strong light at one end and align the tubes until you can "see the light" through all four peep holes from the other end while the tubes are constrained to the stand and while the high and low sides are matched rotationally. a laser could be fired through the peep holes on to a target to prove the four holes are aligned. NOTE: the correct way to do this is with the indicator to aligh the ends while the high and low sides are aligned rotationally, then use the peep holes to set alignment through the total lengths. .. but if it were myself, and didn't have to be aligned to some tight tolerance, I would bridge the two tubes with a straight and stout length of angle iron while the high and low sides were are in rotational alignment. The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. Modified by randykimball at Mon, May 25, 2009, 02:16:34

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: : Can anyone help finding the center coordinates of two rotating tubes?
: : Can anyone help finding the center coordinates of two rotating tubes? -- randykimball	Post Reply	Top of thread	Engineering Forum

Posted by: RWOLFEJR ® 05/26/2009, 09:41:38 Author Profile eMail author Edit

If you could whip up a couple of matched V-Blocks out of material that's stout enough to handle the material you might be able to clamp the two pieces midway in the blocks and slightly squeeze them into alignment. Even if you slightly egg them out in the squeezing they'd egg the same and spring back to their round, or not so round original shape. Even a couple of H-beams... Lay one on the ground. Nest your two tube pieces in the beam flanges. Set your second beam on top. Throw a ratchet strap or chain binders around them and clamp. Or maybe weld a couple of heavy channels on the beams and use a couple threaded bars to clamp?

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