Re: Gecko G201 and Drive Current ?

Hans,

Orient the drive so that the main connector is to the left and
the "Adjust" trimpot is in the upper right-hand corner.

Call the top row of the header pins "1, 2, 3, and 4", left to right.
Call the bottom row "5, 6, 7, and 8".

The jumpers should be "2 to 6" and "7 to 8" for full current, standby
enabled.

Mariss

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Hans Wedemeyer <xyz@h...>
wrote:

> Mariss,
> Thanks for the feedback, that was the kind of info I was looking

for.

> 1) Jumper for Low Current Mode is ON meaning Low Current Mode is

not enabled.

> 2) Resistor is 120K
> 3) Voltage measured across 120K is 12.59
> 4) I'll do the AC amp meter tomorrow. I have to reprogram my PIC

controller for that.

>
> Best Regards
> Hans W
> |
>
> "Mariss Freimanis " wrote:
>
> > Hans,
> >
> > You can put an ammeter in series with one of the windings. Use a
> > battery powered multimeter set to AC amps and step the drive at

240

> > full steps per second (2.4 kHz). The meter should read 3.5A RMS

(5A

> > peak).
> >
> > Make sure the drive is not set to the low current range on the

option

> > jumper block. Make sure your resistor is 120K (brown, red,

yellow) by

> > measuring it; it could be 12K instead (brown, red, orange).
> >
> > The "in-circuit" voltage across the current set resistor should be
> > about 12VDC for a 5A phase current.
> >
> > Mariss
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, Hans Wedemeyer <xyz@h...>
> > wrote:
> > > Here's my setup.
> > > Gecko G201 and PACSI H32 Series motor parallel wired to take 5.6
> > Amps.
> > > Gecko has a 120K Current set resistor this should be a 5 AMP
> > setting.
> > > DC Supply 36 Volts able to supply Max 9 Amps.
> > > Length of cable from Supply to Motor 3 feet. 14 Gauge Wire .
> > > 15000uF Cap. at the Gecko module.
> > >
> > > I did not get the power I expected. This motor is rate at 445oz-

in

> > and the project was calculated to
> > > need about 160oz-in.
> > >
> > > When it failed I started to investigate. First I used a clamp

on

> > Amp meter on the Plus Output lead of the PSU
> > > and started the motor. It read 1 Amp ! I know the reading is
> > integrated, but I really did expect it to show at least 2-3 Amps.
> > >
> > > This makes me suspect the Gecko.
> > >
> > > Does anyone have a good method to confirm the Gecko really is
> > switching these windings at 5 Amps ?
> > > I have equipemnt to test... just tell me how to test this :-)
> > >
> > > Thanks in advance.
> > > Hans Wedemeyer
> >
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