Re: testing with multi-meter - GECKO

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

> Disconnect the wire to terminal 9, and see if it starts going from

low to

> +5 V. It should go somewhere between .4 and at least 3.5 v with no

load.

> Terminal 9 of the Gecko should go to roughly 5 V, assuming the +5 V
> is still hooked to "common".

Driver not with me now, but in earlier tests, parallel cable
disconnected produced the following readings.
terminal 9 (step) 4.89V all axes.

What does this signify? Does that mean the optoisolator is still OK
or bad?

Thanks

Andrew

> andrewyslee wrote:
>
> >Direction: terminal 8 (dirn) toggle between 5V and 0V as motion
> >direction changed. OK
> >
> >Used MDI to move all axes motor slowly
> >G91 G01 X1 Y1 Z1 F0.001
> >terminal 9 (step) X-axis: 0.49V
> >terminal 9 (step) Y,Z-axis: cycle between 3.8V to 5V
> >
> >
> This sounds like your problem. Either your parallel port is bad,

the

> cable is
> bad, or the optoisolator in the Gecko is bad. The opto is

socketed, anf you

> can probably get a replacement from Digi-Key.
>
> Disconnect the wire to terminal 9, and see if it starts going from

low to

> +5 V. It should go somewhere between .4 and at least 3.5 v with no

load.

> Terminal 9 of the Gecko should go to roughly 5 V, assuming the +5 V
> is still hooked to "common".

With Axes not stepping, parallel cable disconnected:
terminal 9 (step) 4.89V all axes

>
> Jon