Re: testing with multi-meter - GECKO

Hi Andrew,

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

Pull the motor wires off the Gecko and test all leads for
resistance. lead to lead and each lead to ground. stranded wires
can break from flexing. With the motor connected, it is easy to test
each wire and that will show any sorts between wires or even in the
motor. if you can, flex the wires as under normal operation. it is
possible there is a problem only at a certain flex.

verify your 5 volt signal. If it is not from the PC, verify a common
ground so the Gecko really sees the 5Volts.
verify your step and direction in software and test the wires for
proper signals at the Gecko.

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