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| Titivating A CNC Plasma Table |
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| philf:
--- Quote from: awemawson on March 19, 2017, 04:05:57 PM --- So - buy an Oldham coupling and bore it to the correct sizes - simple (and done). --- End quote --- Andrew, I'm not usually a pedant but that coupling is a Lovejoy type coupling and not an Oldham! An Oldham coupling wouldn't work in that application because they have no lateral stiffness and would need a bearing to support the screw. http://www.oepcouplings.com/assets/ocanimationsmall.gif The Lovejoy type couplings allow angular misalignment only and no (or very little) axial misalignment. Cheers. Phil. |
| awemawson:
I bow to your knowledge Phil :bow: The vendor referred to it as a Plum coupling :scratch: |
| awemawson:
Well the upper and lower plates are 'VIRTUALLY' done but no time yet for the real things, also need to resolve the usual fixturing issues :scratch: (I marginally altered these from the CAD drawing above, reducing them to 145 x 68 to take a bit of weight out of the assembly and also give a bigger 'waste' for the milling, as the source plate is only rough sawn at a nominal 150 mm wide.) |
| awemawson:
I got time today to finish the upper and lower plates for the Z axis. Each was a two stage process - boring and drilling the holes, then making a profiling fixture and profiling their periphery giving the corners a 3 mm radius. |
| awemawson:
This has allowed me to get to 'first trial assembly' so that I can better decide what layout to use for the travelling stage that mounts the 'floating Z axis' and the actual torch holder |
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