Steps Per Revolution for NEMA17

Steps Per Revolution for a particular stepper motor is calculated using the step angle of that stepper motor. So in the case, NEMA 17 step motor step angle is 1.8 deg.

Steps per Revolution = 360/ step angle
360/1.8 = 200 Steps Per Revolution

 

Specifications of NEMA17

• Rated Voltage: 12V DC
• Step Angle: 1.8 deg.
• No. of Phases: 4
• Motor Length: 1.54 inches
• 4-wire, 8-inch lead
• 200 steps per revolution, 1.8 degrees
• Operating Temperature: -10 to 40 °C
• Unipolar Holding Torque: 22.2 oz-in

 

Also check various stepper motor related projects here, which not only incudes basic interfacing with various microcontrollers but also have robotics projects which involves stepper motor.

 

A4988 Stepper Driver Module

A stepper driver module controls the working of a stepper motor. Stepper drivers send the current to stepper motor through various phases.

The A4988 Nema 17 stepper driver is a microstepping driver module that is used to control bipolar stepper motors. This driver module has a built-in translator that means that we can control the stepper motor using very few pins from our controller.

 

Using this Nema 17 motor driver module, we can control stepper motor by using only two pins, i.e., STEP and DIRECTION. STEP pin is used to control the steps while DIRECTION pin is used to control the direction of the motor. A4988 driver module provides five different step resolutions: full-step, haft-step, quarter-step, eight-step, and sixteenth-step. You can select the different step resolutions using the resolution selector pins ((Nema 8 - 20 x 20mm). The truth table for these pins is given below: