Re: how straight is straight[rails]?

Hi Carl,

Straight line is much easier than posistional.

Remember Y axis your screws will be set against their stop and the X
will not effect the table posistion.

I am sure there are more than a few on here who could do even better
for a lot less than 200K. But those who could, would not for the 8K.

It does sound like a good topic to get a static measurment of out
stuff though.

I thought about a simple laser pointer and a couple photosensors on
the table. The beam passing between them so they both had some
reading. They would be on a micrometer table and the output of them
would be fed to a simple comparator. as the needle drifted one way
or the other, one would move the micrometer table. Tested every foot
or so would reveal the accuracy of either axis.

This could also be fed back to a running corrector while cutting or
the data put in to your software correction table.

Even though this didn't pan out it was a neat excercise.

Dave

--- In CAD_CAM_EDM_DRO@y..., "carlcnc" <carlcnc@y...> wrote:
> HI Guys
> thanks for replys
> the question was about straight line travel not positional
> resolution.
> I have since told this fellow that of course I can provide that
kind
> of accuracy, more like 280K,and the name would be Cinncinati,
> Fadal, Monarch etc.
> In other words,
> I can't do it with my facility,and it CAN'T be done for 8K.
>
> did get the "how close could I get" mental exercises going though
>
> Carl