Posts Tagged ‘Stepper Motors’

Stepper Motors (Part 8)

Part 1, 2, 3, 4, 5, 6, 7, 8 This post is about driving multiple stepper motors continuously sweeping various ranges of steps at various speeds. Each motor features a permanent sinusoidal motion (accelerated and decelerated). The complexity of the code lies in the next requirements: Each motor has its own sweeping frequency, its own full swing range (number of […]

Ultrasonic scanner (Part 2)

Part 1, 2 Most of the electronic diagram shown here should look familiar to the readers of arduinoos posts. The ultrasonic sensor is added to what was described as the test bench for stepper motors. Here is the list of the required components: An Arduino UNO baord (Should I introduce it to you ?) A […]

Stepper Motors (Part 7)

Part 1, 2, 3, 4, 5, 6, 7, 8 This post is about driving stepper motors. In the previous posts I described the various components involved in motorized assemblies featuring stepper motors. However, putting all these nuts and bolts together may lead to unexpected results. In my case, these defects where related to the use of stepper […]

Stepper Motors (Part 4)

Part 1, 2, 3, 4, 5, 6, 7, 8 Speed management As seen in the previous posts,torques must be taken into account while setting the rotor speed during the acceleration, steady and deceleration phases. Starting from there, we have two options: the theoretical and the experimental approaches. Although playing with physics and maths might be fun, it is […]

Stepper Motors (Part 3)

Part 1, 2, 3, 4, 5, 6, 7, 8 A4988 module Let’s go into the details of this module through the understanding of its pinout: The suggested basic wiring is as follows: ~ENABLE: GND MS1, 2 & 3: GND ~RESET connected to ~SLEEP STEP: step pulse DIR: rotational direction GND: same GND for VDD and VMOT VDD: […]

Stepper Motors (Part 2)

Part 1, 2, 3, 4, 5, 6, 7, 8 Stepper motor drivers These electronic devices are the interface between the stepper motor and the controller (e.g. Micro-controller, computer, etc.). Here is a short recap of the expected requirements for such an interface: Drive Unipolar and/or Bipolar motors Convert step commands into appropriate waveforms applied to the motor coils Set […]

Stepper Motors (Part 1)

Part 1, 2, 3, 4, 5, 6, 7, 8 The development and use of stepper motors is directly related to the development of digital electronics. Early systems featuring stepper motors were requiring quite complex electronics made of gates, counters, buffers and voltage interfaces. In the late 70’s I contributed to the automation of a soldering machine for tunnel diode silicon […]