Archive for the ‘Stepper Motors’ Category

Blog of the day

While tumbling on the web for something totally different, I found this very interesting post on SERVOMOTORS, STEPPER MOTORS AND ACTUATORS FOR MOTION. Although, the illustrations are dated, I like very much the detailed, accurate and almost exhaustive description of magnetic actuators.

Stepper Motors (Part 9)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 Let’s go back with an easier application. Still for my friend Valerio, the puppets magician, who built this adorable model-phonograph: It is all wooden made and powered by… a stepper motor, using the electronics which has been described in previous post and showed again here A switch […]

Stepper Motors (Part 8)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 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 […]

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 […]

Ultrasonic scanner (Part 1)

Part 1, 2 And now, something completely different : here is arduinoos’s ultrasonic scanner ! This ultrasonic scanner results from the combination of two main components: an ultrasonic sensor and a stepper motor. Both have already been covered in this blog (here and there). Both component form the head of the scanner which is screwed on top […]

Stepper Motors (Part 7)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 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 Motors (Part 6)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 This post is about an other driver module which is very popular in the world of robots and 3D printers. These modules features the DRV8825 Stepper Motor Controller integrated circuit made by Texas Instrument (Datasheet available from >here<). Although many clones exist, it looks like Pololu was at the origin […]

Stepper Motors (Part 5)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 The A4988 in details Previous posts described the basic use of the A4988 driver. We shall get deeper in the A4988 driver in order to achieve the ultimate driving performances. Apart from the STEP and DIR pins the A4988 driver features additional functions addressable through the following […]

Stepper Motors (Part 4)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 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 […]

Stepper Motors (Part 3)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 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 […]