RE: [CAD_CAM_EDM_DRO] Solid State Relays

While the parallel port will have the proper voltage for most ssr, it is
often deficient in regards to sufficient current. You are likely going to
need a transistor driven by the parallel port to trigger the ssr. Go to
http://www.ktmarketing.com/CNC.html and select the 5th link from the top
"Parallel Port Hookup to Controller". At the bottom of the page are
instructions on interfacing a relay to a parallel port with a transistor.

Tim
[Denver, CO]

> 2) In a similar vein, how do you activate things like coolant, automatic
> draw bar etc. I assume it is through the configurable Mxx codes hooked
> through some sort of solid state relay. If so, does anyone have specs or
> part numbers on the ssr's that can be used? Do these relays need to be
> activated by +5 volts from the parallel port? Will they handle the current
> draw necessary for the device being used?
>
> Many thanks for any help.
>
> Tom Csibor.
> FAQ: http://www.ktmarketing.com/faq.html