Re: [CAD_CAM_EDM_DRO] Re: Gecko 210s l- limited rapids

skykotech wrote:

>>It looks like there is a #10 terminal that is supposed to be
>>connected to the common 5vdc power supply but it is not connected.
>>I wonder if that could be part of the problem?
>>
>>
>
>Uhm, yeah, you should be connecting terminal #10 to the common
>(ground) of the system generating your pulses. I assume you are
>using a parallel port, in which case I think the ground pins are 18-
>25 (double check me on that). I am quite surprised you are getting
>controlled movement at all with terminal #10 disconnected...that is
>the cathode of the leds in the opto-isolators in the gecko drive.
>Actually, I wonder if there is an error in the Gecko manual...it says
>to connect terminal 10 to either supply or ground...but a drawing
>later on shows terminal 10 connected to the cathode of the leds,
>meaning it should be ground only. Perhaps Marris uses bidirectional
>opto leds and just doesn't show it in the doc???
>
>

The Gecko 201 requires this terminal to be connected to +5 V. The Gecko 210
has an option jumper on the step multiplier board that allows you to select
either common ground OR common + for this terminal. With the 210 model,
you can select either polarity, but it will not take both polarities without
changing the jumper.

Jon