Useful info from around the web
help with the French cutting software
to use Profscan (how to cut shapes other then wings)
How to modify the Stepper motor
driver board to drive an XYZ table.
Software from www.kellyware.com
How to hook up the Vexta motor to our stepper
motor driver board - 6 wire Unipolar motors
These boards are not in use anymore - This
is an old board which we don't carry anymore
If you are looking for
stepper motor driver boards,
From left to right
Black | Yellow | Green | Blue | White | Red |
How to hook up the STP57D317 motor to our
stepper motor driver board
From left to right:
Brown | Black | Orange | Yellow | White | Red
Or when the extension cable is connected:
Brown | Black | Blue | Green | White | Red
For stepper motor driver
boards, click here
There are only two coils, and current must be sent through a coil
first in one direction and then in the other direction; thus the name bipolar.
Bipolar motors need more than 4 transistors to operate them, but they are also
more powerful than a unipolar motor of the same weight.
To be able to send current in both directions, engineers can use an H-bridge to
control each coil or a step motor driver chip.
In a unipolar stepper motor, there are four separate electromagnets. To turn the
motor, first coil "1" is given current, then it's turned
off and coil 2 is given current, then coil 3, then 4, and then 1 again in a
repeating pattern. Current is only sent through the coils in
one direction; thus the name unipolar.
A unipolar stepper motor will have 5 or 6 wires coming out of it. Four of those
wires are each connected to one end of one coil.
The extra wire (or 2) is called "common." To operate the motor, the "common"
wire(s) is(are) connected to the supply voltage,
and the other four wires are connected to ground through transistors, so the
transistors control whether current flows or not.
A microcontroller or stepper motor controller is used to activate the
transistors in the right order. This ease of operation makes
unipolar motors popular with hobbyists; they are probably the cheapest way to
get precise angular movements.
(For the experimenter, one way to distinguish common wire from a coil-end wire
is by measuring the resistance.
Resistance between common wire and coil-end wire is always half of what it is
between coil-end and coil-end wires.
This is due to the fact that there is actually twice the length of coil between
the ends and only half from center (common wire) to the end.)