Re: - strees relieving

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Robert Lyman
<robsheplyman@y...> wrote:

> These notes are correct. Generally stress relieving
> is unnecessary and to get it right the process must be
> controlled with reasonable accuracy.
>
> For my cnc router I plan on welding a rectangular
> frame of 2 x 3 x 1/4 wall tubing. Then I will stress
> relieve the weldment in a flat fixed position. Next
> the plan is to blanchard grind the top and bottom to
> minimum clean up, asking the grinder to hold flatness
> and parallelism to a best effort (+/- .005). I will
> then drill and tap the holes for the x-axis linear
> guides on the bottom of the frame. The top of the
> frame will get tapped holes for mounting a cast
> tooling plate, facilitating a replaceable work
> surface.
>
> Rob.
>

I had thought about this some time ago.

If you read the proceedure that Les Watts put in the files section
you can see how one an grind the surface really flat with a hand
grinder.

My idea was to include a fixture and using the linear rails for the
project on this fixture, one can make a gantry and measure sufrace
and mark out the places that need grinding. it seems that would make
measuring much faster.

I toyed with the idea of a tool post grinder to do the work, but at
the excruitatingly slow removal rates it would take weeks to get the
work done.

Maybe a final pass ?

Dave