Phidgets 1063, Руководство по эксплуатации продукта, Страница: 14 / 21

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1063_0_Product_Manual - October 27, 2010 2:54 PM
4 Wire Stepper Motors
A 4 wire Stepper motor can only be controlled as a bipolar. There are two coils, with
the ends of each coil brought out. By applying current to the two coils in sequence,
and changing the direction of current flow, the motor can be made to rotate.
Determining how to connect a 4 wire stepper to the 1063 can be done by following this
procedure.
Start by measuring the resistance between all the wires. Below is a sample table of
resistance data, in ohms. This table contains example values, your readings may be
different but should still produce a similar pattern.
Looking at the table, you see that there are two pairs of wires (Green-White, and Brown-Red), with roughly the
same resistance measured between the wires in each pair. Pick one of the four wires and wire it to the A terminal.
The other wire in this pair is connected to the B terminal. At random, wire the other pair to C and D. The motor will
turn in clockwise or counter-clockwise rotation. To switch between clockwise and counter-clockwise rotation, simply
swap the A and B or the C and D wires.
6 Wire Stepper Motors
In a 6 – wire bipolar motor, there is two + wires, one for each coil, which are the center taps for each coil. You will
need to isolate which are the center tap wires and the corresponding wires for their coil.
These center taps are left unconnected to operate as a bipolar.
Let’s assume our six wire stepper motor wires are colored as follows: red, green, black,
white, brown, and yellow.
We measure the resistance between all wires and are presented with the following
values in ohms (these are simply example values) :
Looking at our table, we can see our pattern. The red wire has the same resistance to
the brown and yellow wires. The green wire has the same resistance to the black and
white wire. Red, brown, and yellow are for one pole, and green, black, and white are
the other pole. The red and green wires are the center of their coils.
Leave the red/green wires unconnected, and follow the instructions for connecting a 4-Wire Bipolar Motor.
There are in fact two valid combinations, one that will produce a clockwise rotation in the stepper motor for
increasing position and one to produce counter-clockwise rotation. In order to reverse this rotation, simply swap the
(A, B) wire pair and the (C, D) wire pair.
Green White Brown Red
Green 30 ∞ ∞
White ∞ ∞
Brown 30
Red
A
B
C D
4 wire motor
6 wire motor
+
A
B
C D
+
Red Green Black White Brown Yellow
Red ∞ ∞ ∞ 10 10
Green 10 10 ∞ ∞
Black 20 ∞ ∞
White ∞ ∞
Brown 20
Yellow