Graphics Reference
In-Depth Information
Note Most stepper motors use an identical wiring pattern, but you should consult the data sheet for the motors
you have purchased to verify the function of each wire. Typically, however, there are two types of stepper motor
configurations: 4-wire and 8-wire. (There are 6-wire motors, but these are not common). Both of these
configurations are depicted as having two main coils in the motor. One coil will be wired to A+ and A- and the
other coil will be wired to B+ and B- (A, B and C, D respectively). On a 4-wire motor, each coil has 2 wires each
(the start and end of the wire). You want to keep the ends of each single coil of wire together and wire them to
either AB or CD on a motor driver. The pinout of 1 and 3 is coil A+ and A- (shown as A and B on our electronics),
and pins 4 and 6 is coil B+ and B- (shown as C and D on our electronics). The 8-wire stepping motor should be
wired as bipolar parallel (consult the motor's documentation for the proper pairing) and the reader should consult
the datasheet for which color wires are used.
You'll want to cut the wires from the motor to a length that will reach the motor's respective motor
driver but also provide enough slack in the wire to allow full movement of the machine's moving parts.
Before cutting the wires, experiment with different lengths by holding a point on a wire to the motor
driver and then moving the various axes and table back and forth; make sure that the wire does not
impeded any movement and make certain it doesn't interfere with any moving parts such as the lead
screw or the table. After you've determined the proper length of the wires, cut them and then strip off
about 1/4" to 1/2” of insulation from each of the wires' ends and solder them to their respective pins on
the motor driver. In Figure 18-3, the first wire (for the Z-axis motor) has been soldered to pin A.
 
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