Re: [CAD_CAM_EDM_DRO] Low cost DRO innerds

On Thu, 6 Mar 2003, Alan Rothenbush wrote:

> Has anyone taken apart one of those low cost single axis 6"-12"-18" etc
> DROs sold all the time on eBay ?

I have.

> Specifically, is there a point where the raw quadrature is "extractable" ?

Because of the way they work it is unlikely there is even a quadrature
signal at all. I can't describe how they work (in a way that makes sense)
but all of the work is done by a single chip that is encased in some
impenetrable black substance.

> I probably could do what I need via the SPC port, but that would mean decoding
> the SPC output .. being lazy, I'd rather do it the "traditional" way.

It isn't really that hard. There are some files in the files section
under Caliper_info\Imported_Caliper_Info\ that describe the output signal.

C|