Re: [CAD_CAM_EDM_DRO] encoder testing (tester)

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