Re: Creating long straight edges (and big squares)

Jon:

Your use of a toolpost grinder to grind to V ways using the tailstock
ways is very cleaver.

But how did you get the tool post grinder to the exact angle of the V
ways. And how did you prevent chatter of the grinder as you moved it
manually down the ways.

WallyK.

>--- In CAD_CAM_EDM_DRO@y..., Jon Elson <elson@p...> wrote:

> Yes, it is slow. I first used a toolpost grinder mounted to the

base of the

> tailstock and slid it down the ways. This, of course, duplicated

the flaws

> in the tailstock ways, which were in a LOT better shape than the

main

> ways. I then tried all sorts of things with a die grinder, mostly

Cratex

> points, and then larger Cratex wheels. These didn't work very

well, but

> I may do some finish work with these later. But, for final

adjustment

> in the .001" range, I'm using bench stones! You oil the stone very
> thoroughly and just rub the stone back and forth on the ways. I

take

> about 100 back and forth movements of 6 - 10" over all the high

spots,

> then clean it and check it with a straightedge. Every hour or so I
> make a pass with a Vee master block that I made and a master

precision

> level. I also use the Vee block with a dial indicator on a

magnetic base

> to read against the reference surface.
>
> I'm getting there, and it is going to be a very straight bed when

I'm done.

> But, it IS slow. This is a big lathe, a 15" Sheldon. See
> http://pico-systems.com/sheldon.html for a progress report with

pictures.

>
> Jon