Re: Gecko G201 and Drive Current ?

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