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Using DC Drive Motors
The DC drive motors sold through the KIPR online store use a two pronged plug and can be plugged into
the KIPR Link motor ports in either direction. The motor port center hole is not employed. The effect of
reversing the plug is to reverse the motor's − +polarity, which simply reverses motor direction.
To check motor polarity manually rotate the motor to produce back EMF to power the LED light for the
port. It will glow green for one direction and red for the other. By convention green means forward, so
if the light glows red when you rotate the motor in what you want to correspond to forward, reverse the
plug.
When your program runs a function that instructs the motor to move the motor will turn. The motor
ports operate with a max current draw of 1A per motor port, where motor speed is regulated by using
Pulse Width Modulation (PWM) to adjust the average power supplied to the motor. Voltage at full
power is 5V.
Each pair of ports (0 and 1, 2 and 3) is controlled by an H-bridge chip, so if you are going to be using
close to 1A per motor (full throttle), plug your motors into ports controlled by different H-bridges (e.g.,
0 and 2) to limit heat build-up in the chip. The will reduce the incidence of failure for your H-bridge
chips over time and will extend their operational life.
Note that only the outside two pin positions for a motor plug connector are used. The KIPR Link Library
motor functions set motor port polarity − +, lighting the green LED, if the direction is to be forward. If
the motor direct is to be in reverse, motor port polarity is set + −, lighting the red LED. See the appendix
for the specifications on creating your own motor plugs.
1
0
3
2
motor lights 0,1,2,3
Содержание KIPR Link
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