Howard, There is another way... the Sanyo amp and the 5i20/7i33 can work together with analog velocity mode.
Emc would work with the 5i20 to create a PWM signal The 5i20 would send this to the 7i33 which would convert PWM to Analog The analog signal would go to the Sanyo amplifier This input is not a pulse at all, it is often a ramp like this V ^ __________ V ^ e | / \_____ o | l | ___/ \__________ l | o | t c -----> time a i g t e y the speed is proportional to the command voltage the direction depends on the sign of the command voltage like this __________ ^ / \ | positive direction no motion ___/............\...0volts | \ | -----> time \________ | negative direction v The amplifier would move the motor The Encoder would return to the amplifier and on to EMC. EMC would close the position loop. I think this is the most common form of cnc control. It is not the newest, but is very common. regards TomP ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users