Industrial Servo Motor YASKAWA SGM-01B3FJ12 AC SERVO MOTOR 100W 100V 2.2A

 
 
 
OTHER SUPERIOR PRODUCTS

SIMILAR PRODUCTS

USING BIPOLAR STEPPER MOTORS
As detailed earlier in the chapter, unipolar stepper motors contain four coils in which two of the coils are joined to make a center tap. This center tap is the “common”  connection for the motor. Bipolar stepper motors contain two coils, do not use a common connection, and are generally less expensive because they are easier to manufacture. A bipolar stepper motor has four external connection points. An old method for operating a bipolar stepper motor was to use relays to reverse the polarity of a DC voltage to two coils. This caused the motor to inch forward or backward, depending on the phasing sequence.

Today, the more common method for operating a bipolar stepper motor is to use a specialty stepper motor translator, such as the SGS-Thompson L297D (the L297D can also be used to drive unipolar stepper motors). To add more current driving capacity to the L297D you can add a dual H-bridge driver, such as the L298N, which is available from the same company. The truth table for the typical driving sequence of a bipolar stepper
motor is shown in Fig. 19.13 (see p. 292).

BUYING AND TESTING A STEPPER MOTOR
Spend some time with a stepper motor and you’ll invariably come to admire its design and be able to think up all sorts of ways to make it work for you in your robot designs. But to use a stepper, you have to get one. That in itself is not always easy. Then after you have obtained it and taken it home, there’s the question of figuring out where all the wires go! Let’s take each problem one at a time.