Hi, Welcome to the forum. Please read the first post in any forum entitled how to use this forum.
Then look down to item #7 about how to post your code. It will be formatted in a scrolling window that makes it easier to read. Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png? Including you power supplies, please no Fritzy picture. Can you post a picture of your project too please? What driver do you have? Links to data/specs of driver and stepper.
Apr 01, 2015 They are rated for: 1.4A at 3.22V 0.72°/step NEMA23 Now, I thought I'd design my own 5 phase bipolar stepper driver using 5 H-bridges and an AVR. I already looked at the L298 and the DRV8844. I already looked at the L298 and the DRV8844. The CRD 5-Phase Stepper Motor Driver with Built-in controller, Stored Data or Stored Program type, is a space saving, 5-phase driver / controller for New Pentagon type 5-phase stepper motors.
I know its a lot but we need this information to give you accurate answers Thanks Tom. Hi, Thanks for the diagram, you will not be able to power those steppers off the 5V of the MEGA. They will need their own 5V power supply. Your stepper driver has provision for that as well.
Go back and start with just ONE stepper and get it working, you can get one of those geared steppers to work off the arduino power and USB. Do not be surprised if you have to swap the 4 driver outputs around to get the stepper to rotate back and forth. PS I have those components as well, I'll assemble the project with one stepper when I can. Mains Power means your utility AC supply, what is the supply you are using, PC or USB adapter.
Stepper motors is a brushless DC motor that rotates in discrete steps, and are the best choice for many precision motion control applications. Also, stepper motors are good for positioning, speed control and applications which require high torque at low speed. In previous tutorials of MATLAB, we have explained that how to use MATLAB to control DC motor, Servo motor and Home appliances. Today we will learn how to control Stepper Motor using MATALB and Arduino. If you are new to MATLAB then it is recommend to get started with simple LED blink program with MATLAB.
Modes of operation in Stepper Motor Before you start coding for stepper motor you should understand the working or rotating concept of a stepper motor. Since the stator of the stepper mode is built of different pairs of coils, each coil pair can be excited in many different methods, this enabling the modes to be driven in many different modes. The following are the broad classifications Full Step Mode. In full step excitation mode we can achieve a full 360° rotation with minimum number of turns (steps). But this leads to less inertia and also the rotation will not be smooth.
There are further two classifications in Full Step Excitation, they are one Phase-on wave stepping and two phase-on mode. One phase-on stepping or Wave Stepping: In this mode only one terminal (phase) of the motor will be energised at any given time. This has less number of steps and hence can achieve a full 360° rotation.
Since the number of steps is less the current consumed by this method is also very low. The following table shows the wave stepping sequence for a 4 phase stepper motor.
Step Phase 1 (Blue) Phase 2 (Pink) Phase 3 (Yellow) Phase 4 (Orange) 1 1 O O O 2 O 1 O O 3 O O 1 O 4 O O O 1 2. Two Phase-on stepping: As the name states in this method two phases will be one. It has the same number of steps as Wave stepping, but since two coils are energised at a time it can provide better torque and speed compared to the previous method. Although one down side is that this method also consumes more power.
Step Phase 1 (Blue) Phase 2 (Pink) Phase 3 (Yellow) Phase 4 (Orange) 1 1 1 O O 2 O 1 1 O 3 O O 1 1 4 1 O O 1 Half Step Mode The Half Step mode is the combination of one phase-on and two-phase on modes. This combination will help us to get over the above mentioned disadvantage of the both the modes.
As you might have guessed it since we are combining both the methods we will have to perform 8-steps in this method to get a complete rotation. The switching sequence for a 4-phase stepper motor shown below Step Phase 1 (Blue) Phase 2 (Pink) Phase 3 (Yellow) Phase 4 (Orange) 1 1 O O O 2 1 1 O O 3 O 1 O O 4 O 1 1 O 5 O O 1 1 6 O O O 1 7 1 O O 1 8 1 O O O Hence, it is your choice to program your stepper motor in any mode, but I prefer Two Phase-on stepping Full Step Mode. Because this method deliver faster speed then the one phase method and in compare to half mode the coding part is less due to less number of steps in two-phase method. Creating MATLAB Graphical User Interface for controlling Stepper Motor Then we have to build GUI (Graphical User Interface) to control Stepper motor. To launch the GUI, type the below command in the command window guide A popup window will open, then select new blank GUI as shown in below image, Now choose two toggle buttons for rotating the stepper Motor Clockwise and Anti-clockwise, as shown below, To resize or to change the shape of the button, just click on it and you will be able to drag the corners of the button. By double-clicking on toggle button you can change the color, string and tag of that particular button.
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