Re: [CAD_CAM_EDM_DRO] Re: 5V+ Supply for Gecko?

caudlet wrote:

>[snip]
>The Gecko's have an internal buss supplied from the Motor + and -
>leads. The encoder - is the same as Motor - . This will in most
>circumstances put it at some voltage above or below the PC ground.
>The Gecko has a small internal regulated supply for its CMOS based
>circuity and the +5 for the encoder is derived from that and is
>limited to 50ma. If you need more than that you need a separate +5
>supply with it's ground referenced to Motor - (internal Gecko buss
>ground). I know you said all of the above in your post but I just
>wanted to look smart and feed my ego!
>

Just to clarify:
"ENC -" is the same as "Power ground" - NOT "ARM -". (there is no
terminal labeled "motor -", so it may not be perfectly clear which
terminal you're referring to :) )

You still need to connect a ground pin between the parallel port and the
supply used for the step/dir inputs. These inputs are the - terminal of
an LED, so you have to have a current path from the common supply,
through the LED, and to ground of the same supply.

- Steve