Here is the new power supply for a
www.hobbycnc.com
4aupc board. The power supply was a 24 volt 6 amp regulated supply.
I have removed the regulator and have 36 volts at about 6 amps which
should be able to handle 3 pieces of 3 amp stepper motors.

Here is a picture doing some "motorspinning" using the computer from
the present cnc machine. The new computers are Tyan 1854s with socket
370 P3-1000 cpu's and 133 mhz front side buss ram. This combination of
computer seems very stable.

Here is a picture of the new fourth axis.
Now I need to find a chuck!

Here is another Dahlgren engraver base, saved from the scrap heap.
This is the same base as my first machine (see CNC machine #1, below).
I just cleaned and loaded a pair of stepper motors today.

Just a little more motorspinning and I have found a bad stepper motor.
Axis on this machine will be 5.5 inches for X axis and also 5.5 inches
for Y axis. Now I must build something for Z axis!