Re: Help implementing spindle & coolent on/off

It might be worth taking a look at the NE590, seems a bit like an
addressable ULN2003.

" The NE590 addressable peripheral driver is a high current latched
driver, similar in function to the 9334 address decoder. The device
has eight Darlington power outputs, each capable of 250 mA load
current. The outputs are turned on or off by respectively loading a
logic HIGH or logic LOW into the device data input. The required
output is defined by a 3-bit address. "

http://www.semiconductors.philips.com/acrobat/datasheets/NE590_2.pdf

Rab

--- In CAD_CAM_EDM_DRO@y..., "eferg2001" <eferg@a...> wrote:
> I'm building a 4-axis controller using Gecko 201's for my Taig mill.
> The power supply is no problem, but I need help implementing the
> bells and whistles - spindle & coolant on/off and limit switches.
I
> plan to use Master5 software.
>
> Questions:
>
> 1) A schematic is worth a thousand words - any pointers to diagrams?
>
> 2) Can 4 axis, plus spindle & coolant on/off, and limit switches be
> implemented using a single parallel port?
>
> 3) If solid state relays are the solution for spindle & coolant,
can
> someone make a recommendation? Are any other components needed to
> interface the PC to the relays? What about power requirements? I
> order most my parts from Jameco.
>
> 4) Any pointers to implementing limit switches? Again, specific
> diagrams and part numbers are appreciated. I notice Jameco carries
> proximity switches.
>
> Any help is appreciated.
> Regards,
> Ed Ferguson