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Yet an other Rotary Table, Direct Turning

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necchiom

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Good morning folks.
I finally won over shyness (or laziness...) and I decided to share my experience on developing a sligthly modified version of the Harold Hall: Rotary Table, Direct Turning.
"Modified" because casually I found a bigger piece of cast iron than what suggested by the original drawings... Furthermore because I had to convert dimensions from Imperial to millimeters.
Here is what I've done so far. Last, but not least, I apologize for my bad spaghetti english.

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dethrow55

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hello not to be a wise guy , the origional drawings are in metric. nice! happy new year
 

dethrow55

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wow thats strange because in the book that i have, its metric . maybe there is a metric and imperial version of the drawings.
 

necchiom

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During the weekend I had some hours for producing new parts, improve and finish some others.
Here are some pictures.
Unfortunately I am discovering that the original design, in my humble o pinion..., has some conceptual lacks.
Nose, pin and reference hole in the rotary table is in an hyperstatic condition so no way to fine tune the alignment among the three axes.
I am thinking about a different solution based on a eccentric rotating bush.

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