By Michael Simpson
SERVO 07.2014 45
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Figure 2. Figure 3.
Controller Board Layout
Lay the power supply and controller
board out as shown back in Figure 1. Use
a pencil to mark the four holes for the
controller board. Note that in the Bill of
Materials listed on my website, there are
two boards. One is a four-axis and the
other is a three-axis. Both can be placed in
the same location. Just keep in mind that
the four-axis will take up more space.
Using a 3/16" drill bit, drill the four holes.
Now, place a flat washer on a #6-32
x 3/4" machine screw and insert it
through one of the controller board
holes. Insert the screw from the bottom
of the layout board. Add a #6 lock
washer and #6-32 hex nut to secure it as
shown in Figure 3. Repeat on the
Slip the controller board over the
four screws and secure with a #6 lock
washer and #6-32 hex nut as in
Power Supply Layout
Place the power supply on the
board as shown in Figures 1 and 5.
Mark the edges of the power supply,
then use the power supply PDF files to
lay out the four center holes. Using a
7/32" drill bit, drill the four power supply
holes. Then, using four M4-. 7 x 6 mm
machine screws, attach the power
supply to the board. Be sure the power
supply is oriented as in Figure 5.
The first wiring step is to connect
the main power leads from the power
supply to the controller board. This is
best done with a pair of 6" wires like
those shown in Figure 5. Connect one
of the +V terminals on the power supply
to the terminal marked +. Connect the
-V terminal on the power supply to the
negative terminal marked - on the
controller. For this connection, use
16 gauge stranded wires. Check your
local home center for this wire.
On the four-axis board, the power
connectors on the controller are located
on the opposite side of the controller.
You will need longer wires as shown in
Figure 6 to make this connection.