RE: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME - for fun and learning

> This falls into the 'don't count on it' category.
>
> Threads and most metals have pits and gouges, espically cut threads.
>
> Chances are that the epoxy will fill those little gaps and lock the
> part solid. Very solid. Even release agents do not always allow
> the epoxy to be released from the gaps and pits and scratches. That
> means when you use the threaded rod as part of the threadform it may
> lock in place.
>
> I'm not sure if rotating the thread after some minutes/hours will
> work.
>
> Dave

This is why they use a wax based release agent for the cast in place nut
and slide materials. The wax fills the minute voids and also builds up
the surface so that you have a little bit of clearance between the cast
epoxy part and the screw. Good information on the Philly resin website
about how to do this.

As far as making the epoxy more slippery, the Philly resin casting
compound for this application has a fair amount of graphite mixed right
in. They also recommend cutting oil grooves and using oil so I am not
sure where the advise to not use graphite and oil together came from.

Tim
[Denver, CO]
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