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Steam & Excursion > ORHC - turntable pivot placementDate: 02/05/23 14:26 ORHC - turntable pivot placement Author: asheldrake 2/3/2033 Photos compliments of Dale Birkholz. Pivot being flown into postion. Pivot is within 1/8" of center mark. Omega Morgan did the move, Everett Engineering was on site to verify.
MANY thanks to Dale for permission to post his, as usual, excellent photos. Arlen (to an earlier question, yes, the forklift is out of the pit) to Date: 02/05/23 15:13 Re: ORHC - turntable pivot placement Author: HotWater Great photos Arlen.
Question, what with all of toady's "modern technology", can't they get that center pivot closer than 1/8 of an inch? Date: 02/05/23 15:22 Re: ORHC - turntable pivot placement Author: asheldrake no ideas Jack....way beyond my training/knowledge.
Date: 02/05/23 16:29 Re: ORHC - turntable pivot placement Author: nycman Can't relie on those toadies, can we? Thanks Arlen.
Date: 02/05/23 16:49 Re: ORHC - turntable pivot placement Author: BlaineM I suggested a string stretched from corner to corner would place the center pivot exactly. But my idea was dismissed.
Blaine American Fork Date: 02/05/23 16:50 Re: ORHC - turntable pivot placement Author: wcamp1472 1/8" is not that important..
Thermal expansion/contraction ( daily temperature cycles) over the length of a 110ft turntable, makes 1/8" off-center an insignificant dimension... Let's be more realistic, here. A hundred degrees in the summer sun means a greater dimensional concern... IMHO.. If it's too long in the summer heat, the remedy is easy ! W. ( " Corner-to-corner".... in a circle? ) Edited 2 time(s). Last edit at 02/05/23 17:43 by wcamp1472. Date: 02/05/23 18:42 Re: ORHC - turntable pivot placement Author: ST2K Where the three location pieces grouted in place after the alignment was assured?
ST2k Date: 02/05/23 19:17 Re: ORHC - turntable pivot placement Author: wcamp1472 Might not want to do the 'grouting'....at this early stage....
until after all the components are placed, tested, adjusted and finalized. Saves having to bust-up the too-soon grout to accommodate the final adjustments .. Dont get the cart, before the horse. W Date: 02/07/23 22:32 Re: ORHC - turntable pivot placement Author: atsf121 An 1/8" is pretty darn precise on something like this. Wish my house had been built that precisely. It's been fun to watch and learn as the project has progressed.
Nathan Date: 02/08/23 04:53 Re: ORHC - turntable pivot placement Author: wcamp1472 What we're talking about is the 'tolerance space'..
Its as if you picture a dot of light, 1/8" in diameter. The actual, pin-pont, imaginary center of the bearing assembly, is 'within' that 1/8" circle....it might, in fact, be exactly in the center; but, our measuring device 'certainty', is 'within 1/8" --- so the MOST off-center it could be is 1/8",--- and could be way-less, and might in fact. be 'zero'. Stating the possible 'variance-of-certainty' ---- does not mean that it is, in fact, 'off-center'... It might be 'dead-on' center & within that little 1/8" 'dot'... W. Date: 02/10/23 08:41 Re: ORHC - turntable pivot placement Author: LocoPilot750 Are the ocean's sea levels really level ?
Date: 02/10/23 08:50 Re: ORHC - turntable pivot placement Author: BAB LocoPilot750 Wrote:
------------------------------------------------------- > Are the ocean's sea levels really level ? Well I agree some what the way this went into space never fear TO commenters over do thiings. Date: 02/10/23 09:56 Re: ORHC - turntable pivot placement Author: wcamp1472 Sea levels?
The oceans’ local surfaces are technically segments of a spherical shape….so, you can say they are curved, as seen from space.. “Sea level” refers to the varying height of ocean water on the shore line. “Level” can be an adverb regarding degree of tilt of an object, or virtually NO tilt. W. Posted from iPhone |