Re: [CAD_CAM_EDM_DRO] Re: M57-102 < - - - - > PC

m0nkey0ne wrote:

>I worked at getting the motor turnig today, but to no avail. The
>problem you indicate here. I had visions of making the parallel port
>control a more powerful source. I have only about 1.5 volts with the
>step port high. Looks like I should search for the buffer...
>
>

Since this driver gives you access to both terminals of each opto-coupler,
you should tie the + input to the +5 V from the computer (game port pin
or hard drive power connector) and the - input to the parallel port pin.
These chips generally have much more drive capability in the current
sinking mode.

Jon