When should I use microstepping?
microstepping is used in applications requiring the motor to operate at less than 700 PPS. At low pulse rates, stepper motors to less smooth and often vibrate.
What is a unipolar stepper motor?
A unipolar stepper motor for sale is one of the two basic types of two phase stepper motors. The unipolar motor has one winding with a center tap per phase. Typically the center tap is made common, giving three leads per phase and six leads for the typical two phase motor. Mostly these two phase commons are internally joined making the motor have five leads. A micro controller or stepper controller can be used to control drive transistors in the right order, creating an ease of operation making the unipolar stepper motor the cheapest way to gain precise angular movements.
What is a bipolar stepper motor?
A bipolar stepper motor for sale is a type of two phase stepper motor that has a single winding per phase. The current in t5he winding of this type of motor needs to be reversed in order to reverse a magnetic pole, thus making the drive control on bipolar stepper motors much more complicated.
What is a stepper motor?
Stepper motors are DC motors that turn in distinct steps. At every step the motor holds its position needless of power, thus eliminating the necessity for feedback positioning sensors, so long as the motor is properly sized and no steps have been skipped. The removal of feedback requirements and the digital nature of a stepper motor makes it simple to integrate into digital systems.
What are the differences between Step and Servo motors?
Step motors are permanant magnet motors that "Step" one increment each time the computer gives its control electronics one pulse. These motors do not need position feed back (if run within their limits). When stopped they automatically hold their position. Servo motors are DC motors with an encoder feedback loop. The computer reads the position of the motor and controls the power that is applied to the motor. Servo motors move faster point to point and are better at accelerating heavy machinery. They have more power at high speeds than a stepper motor, and can spin much faster, generally 3000-6000 rpm. A step motor has lots of low speed power, however it should not be run faster than 800 rpm since torque falls off quickly. A Servo system knows where the machine is while cutting, and knows whether the motor is under heavy load or an axis has jammed and will stop the machine. A stepper system does not have feedback and does not know whether or not it has jammed or lost position. In this aspect, a servo is more reliable. Step motors are just as accurate as Servo and, additionally, are simpler and maintance free in harsh and/or dusty applications.
What is stepper motor resonance?
Resonance refers to an unstable condition while running a step motor. Resonance often occurs between 2-4 rev/sec, and can be alleviated in many situations by placing a load on the motor, changing from full stepping to half or micro-stepping, and/or increasing your acceleration through the resonance zone.
What is a stepper motor controller?
A stepper motor controller, commonly referred to as a motion controller, is a system that controls the rotation of motors with the purpose of moving a mechanical component to a determined position. Motion controllers should not be confused with motor drivers, which are the power component of a positioning system. The leaders are those systems based on a PC that give the signals for the motors through the parallel port.
What temperatures do step motors usually run at?
Most step motors include Class B insulation. This allows the step motor to sustain temperatures of up to 130 degrees C. Therefore, with an ambient temperature of 40 degrees C, the step motor has a temperature rise allowance of 90 degrees C allowing for step motors to run at high temperatures.