Re: [CAD_CAM_EDM_DRO] encoder testing (tester)

got a number on that chip?

James Owens wrote:

> Hi,
>
> Maplin do a nifty counter which will take a TTL input they can be found at
> www.maplin.co.uk catalogue number FS13P @ £9.99 it is a very cheap
> solution. I am thinking of putting together a circuit to do just this with
> the addition of USDigital's quadrature reader chip. I will post the results.
>
> Regards,
>
> Terry
>
> | If you are just trying to catch the marker pulse, what about using a
> | logic probe? You may have to make a custom cable (make sure you crimp,
> | solder and use 16G ultra flexible cable...:-)) so you don't have to hold
> | the probe point in contact with the correct pin.
> |
> | Most logic probes are pretty frugal on the power they draw so you may be
> | able to use the encoder 5V rail - but you should double check things -
> | before you connect.
> |
> | Cheers, Peter
> |
> |
> |
> | dk1machine wrote:
> |
> | > Does anyone know of a design for a simple 5v TTL quadrature encoder
> | > tester? Perhaps using LED's to show the switching of each channel. One
> | > more wish would be that it's battey powered so it could go to the
> | > machine for the test. Very clunky to use a scope for this purpose, and
> | > catching that marker pulse is a trick.
> | >
> | > Thanks
> | >
> | > dan k
>
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