The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
Pete.:
Surely you could wire EDM the sides but I don't see how you could do the bottom.
cnc-it:
I wonder if Baruffaldi has a part you could modify with the teeth already machined..it's a curvic coupling..these are hardened and ground to micron tolerance usually..larger ones are used on 4th axis horizontal machine centers to locate the pallets. Any slop would cause wear over time hence the need for a precision fit?
awemawson:
I'm sure that the original Baruffaldi drive dog was steel, and machined. But of course I have never seen one, as my lathe was fitted with the dog to fit 'hens teeth rare' Beaver powered tools. So my 3D model is entirely guesswork but must be close. The dog shaft actually slides and is spring loaded into contact.
I've simplified and re-drawn the model this morning - hopefully this view will give a better idea of the tooth shape. I rather like the idea of lost wax casting it in bronze.
However it does occur to me that a plastic 3D printed one actually forms a useful safety 'mechanical fuse' in the case of jam ups, and it's dead easy to make another and re-fit it.
. . . I'm off now researching wax 3D printer filaments . . . . :coffee: :coffee:
mattinker:
Andrew,
how about a three D printed core and cast in bronze using a fine petrobond sand mold?
Regards, Matthew
mattinker:
Me again! You could print on your 3D printer two or three piece mold to cast a wax version of your part?
A passing thought, cheers, Matthew
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