Re: testing with multi-meter - GECKO

"turbulatordude" <davemucha@j...> wrote:

> if you have a line on the pin 7 shut-down, pull it off and re-test.

Now that I have access to the terminals, did some probing.
Probe across terminal 7 and 12 (ground?)
Driver power off: -0.34 V
Driver power ON: 11.14 V

Pulled off line on terminal 7: X-axis motor still silent.

> verify your step and direction in software and test the wires for
> proper signals at the Gecko.

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

With Axes not stepping, parallel cable connected:
terminal 9 (step) X-axis 0.41 V
terminal 9 (step) Y,Z-axis 5.03 V

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

Any Gecko doctor around? What is the diagnosis?

Many thanks

Andrew

> reconnect and with power on, send a signal to drive the motor one
> direction so it will run some seconds. monitor the power supply
> voltage. a properly sized power supply should not see a drop in
> voltage.
>
> Finally, ohm each wire, motor leads, switches, step and direction

and

> make sure there is no problem. THEN replace with a known good unit.
>
> Dave
>
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "andrewyslee"
> <andrewlee@s...> wrote:
> > "caudlet" <info@t...> wrote:
> >
> > > With power on, first, make sure you have the correct DC volts

on

> > the
> > > Power Gnd (-) and + to VDC pins of the Gecko using your meter.
> > ------------------------------------
> > It was working before. No change had been done to the wiring,

plus

> > Gecko LED is ON.
> > ------------------------------------
> > > If the
> > > motor is "locked" with the power on and no signals it is a good
> > sign
> > > you have voltage and the Gecko power section is working.
> > ------------------------------------
> > The shaft is "locked" when driver powered on.
> > ------------------------------------
> > > If you have done the following you can pretty much rule out bad
> > > wiring: With the PC and Controller OFF, take the X (bad Axis)
> STEP
> > > and DIR signals and move them to the working axis (Y). Turn on
> your
> > > power. Jog X. If Y moves, the signals are good. If not,

suspect

> > > your wiring or parallel port. If it jogs then It pretty much

has

> > to
> > > be the Gecko or wiring between the Gecko and motors. If it

fails

> to
> > > move then the X signals are missing and the problem in in the
> > > controller hardware or software.
> > ------------------------------------
> > Can't get access to the x- step/dirn. wires. However, connected
> > controller to another driver. All axes working. Looks like that
> > leaves the x-step/dirn signal wires inside the bad driver? Is

there

> > any way I can test that without opening up the driver?
> >
> > Is it safe to connect a multimeter to the phase A/phase B of the
> > motor cables, set to measure current/voltage. If it is what would

I

> > expect to read?
> >
> > Thanks
> >
> > Andrew