Re: Gecko 201 drive

Hi,

The current set resistor forms the bottom half of a voltage divider.
The top resistor (internal) is 47K and pulls up to a 17 volt
reference.

The motor current is directly proportional to the voltage across
terminals 11 and 12, 12 being ground.

If you want to use a potentiometer to set the current, I would
suggest using a 1K pot and an LM317 regulator set to 17 volts. One
end of the pot would go to +17VDC, the other end to ground (terminal
12) and the wiper to terminal 11.

You can then mark a dial in 1A increments. The settings would be
evenly spaced instead of being scrunched up at one end as they would
be if you just used a pot across 11 and 12.

Mariss
Geckodrive

--- In CAD_CAM_EDM_DRO@y..., Ron Kline <ulpilots@y...> wrote:
> The 201 uses a 1/4 watt resister to set the output
> current , do any of you know if I could use a pot
> instead so I can change the out put when I'm using the
> drivers on my other machines .
> Thanks
> Ron K
>
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