Re: [CAD_CAM_EDM_DRO] Re: Bridgeport CNC Mill???

David G. LeVine wrote:

> What you need is called a Breakout Board.

No, a "breakout board" is for use with drives that take step and direction
signals to control motion. The old Anilam servo system used the classic
velocity servo system, where the CNC control sent an analog voltage to the
amp to command velocity. It usually has a range of -10 to +10 Volts,
hence these are often called +/- 10 V drives. Polarity of the signal
determines direction, amplitude of the signal controls velocity.

There are a number of devices that can be had for EMC2 to drive this
type of servo amp. I believe the Galil boards can also do this from a
Mach system.

> If your servos are analog, you will need a D/A board, those are more
> spendy, but not intolerable. Pico Systems has some of these:
> http://pico-systems.com/DAC16.html
>

The DAC board, alone will not complete the system. For a complete
analog servo
interface, you need the encoder counter board, the DAC and the digital
I/O, and
a motherboard to couple them all together. That does run the cost up a bit,
but you get a 4-axis interface, with the option to add more axes or other
functions by plugging in additional boards.

> If you have resolvers rather than encoders, Pico Systems has a solution:
> http://pico-systems.com/resolver.html
>

Thanks for the plug!

Jon