A kind of motor that moves in steps.

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37 views

How to repair a CD/DVD Drive stepper motor with broken foil/tab [on hold]

I'm trying to salvage CD/DVD drive stepper motors. I soldered wires into the tiny PCB tab that comes over the coil of the motors but I used solid wires which bent and detached the foil from the motor ...
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2answers
92 views

What will happen if I connected 3amps adapter to motor that's need only 2.1amps are that will burning the motor?

I have 3amps power supply and the motor just need 2.1amps so if I connected they together are that will destroying the motor ?
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1answer
53 views

How to estimate the settling time of the rotor of a stepper motor?

I'm trying to estimate how long I need my stepper's pulses to be to ensure I don't miss steps and assess how big the vibrations will be because of the ringing (i.e. how fast it can be, considering a ...
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2answers
77 views

How to choose the suitable battery for 6 stepper motors?

I am new to electronics and trying to build a robot that uses 6 stepper motors. I bought 6 of this stepper motor and used Pololu stepper motor driver A4988 to drive them but I have an issue with the ...
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1answer
23 views

Low current to HS gate drive in DRV8825 typical application diagram

simulate this circuit – Schematic created using CircuitLab The typical application diagram in the DRV8825 stepper driver datasheet includes a 1MOhm resistor from VM(the motor voltage) to VCP(...
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1answer
44 views

Question regarding answer on “Stepper motor won’t turn once loaded”

I am trying to calculate the torque for the stepper motor I need in my system. I found out this question with a nice answer how to calculate the different parameters (Stepper motor won’t turn once ...
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1answer
45 views

Stepper motors: feedback to detect successful step?

Is it possible to have a stepper motor driver circuit detect if the motor has successfully stepped, ie not stalled, or stepped too quickly? (Not microstepping).
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1answer
26 views

Microstepping methods for stepper motors: PWM? Phase? Frequency?

I want to know what methods are used for microstepping stepper motors, and their pro's and cons For example, I presume, to hold the motor between two steps, PWM would be most efficient; simple ...
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1answer
52 views

Why do VR motors like sinusoidal current?

I have a question regarding powering electrical motors, variable reluctance motors to be more precise (ie. Stepper motors). This kind of motor, in a perfect situation would like to be powered with ...
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2answers
71 views

Count PWM Pulses fed into Stepper Motor FET Driver

I am trying to (accurately) count the number of pulses fed to a stepper motor driver TI DRV8711. This driver "converts" one rising edge, depending on the settings, to a full step or microstep. The MCU ...
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2answers
21 views

Stepper Motor Speed control using Driver IC

I am referring Stepper Motor driver IC DRV8824 and TEA3718. I want to increase speed of rotation and as per datasheet of DRV8824, rising edge on step pin causes the indexer to move one step. Does it ...
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1answer
42 views

Stepper motor noises change at random

I'm having an issue with my stepper motor, while I am aware they should make a noise that is dependent on the current and speed of the stepping, the issue I'm having is the noise is changing. For ...
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2answers
60 views

Can I drive a stepper motor with a regular MCU?

If we just focus on the signals and not the power, will an ordinary MCU like any of the ubiquitous Atmel 32-bit controllers be sufficient to drive a step motor? What are the benefits of prepackaged ...
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1answer
87 views

How do you drive a stepper motor with an L9110 driver module? [closed]

I have a dual channel motor driver module based on two L9110 H-bridges: The documentation and many, many tutorials on the internet mention that this can be used to drive two DC motors, or a signle ...
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2answers
65 views

DC motor vs Stepper motor vs Continuous servo - Which one should I use? [closed]

I'm about to build a robot arm (trust me, I've already got most of it down), but I don't know which type of motor to use. From what I understand, DC motors do the same thing as Stepper motors but ...
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0answers
35 views

Moving a stepper motor in sine and chirp wave forms

I am trying to put together a set-up with a 4 - phase bipolar stepper motor controlled by an Arduino Uno and driven with a Leadshine ND556 stepper motor driver with a 12 V power supply. Once the ...
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1answer
59 views

Stepper motor reducing torque

I have a 5V stepper motor with a 1/64 gear reduction; it looks like this: When at rest, I can't turn the shaft with my fingers. However, when the shaft turns, I can. It seems that the torque is ...
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1answer
57 views

Using Stepper Motor like Hobbyist Servo [closed]

I want to use a stepper motor in place of a hobbyist servo that I am currently using to actuate a throttle. The motor is to turn from 0 to 90 and modulate engine speed between these two positions ...
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2answers
100 views

Continuous micro steps changes harm stepper motor or driver ?

I'm gonna use stepper motor for the first time in our project and it's need speed and precision both to rotate a particular angle. So I'm thinking of changing micro steps continuously like initially ...
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1answer
25 views

Stepper motor disconnection from drive

I've read this statement online when it comes to driving the stepper motor "Do not connect or disconnect the stepper motor from the driver when energized" What does this exactly mean. And what will ...
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2answers
56 views

Transform pulses per second (pps) to rpm

I have a stepper motor that turns at 5000 PPS and has a step angle of 1.8º. What would be the formula to transform these pps into rpm? Thanks in advance!
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4answers
99 views

Can I drive a stepper motor like a brushless motor?

If I want to accelerate my stepper motor at maximum acceleration, can I drive it by watching the position of the rotor with an encoder and stepping the motor whenever it completes the previous step? ...
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1answer
70 views

Behavior of power supply and DC motor for voltage/current combinations?

Are the below statements correct? Marked in Bold and Italic are my doubts! Unregulated power supply (Battery?) If supply current rating > motor current rating --> No problem since motor pulls only ...
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1answer
46 views

Stepper motor voltage rating

I want to drive a stepper motor which I've extracted from an old Epson printer. I am able to recognize that the motor is bipolar and i found the coil polarity by testing it with a multimeter. However ...
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1answer
28 views

Voltage regulator drop

First off I'm a beginner at electronics I don't understand much so bear with me. I've just constructed my first bipolar stepper motor circuit today on a breadboard. I've actually extracted the ...
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0answers
55 views

Speed and torque calculation of stepper motor

The bipolar geared stepper motor I am planning to use has a resistance/ phase of 8.5 ohms per phase, inductance of 2.14mH per phase , normal current per phase is 2 amps, holding torque of motor is 0....
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1answer
59 views

Constant RPM Low Speed Motor drive [closed]

What is the best way to drive a motor (DC/Brushless/Stepper) at a constant, yet low RPM? It must have no jitter and no drift over time. I'm aware that some gearing will be required. Basically what ...
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2answers
88 views

Stepper motor causes massive spikes in power supply when decelerating

I am running a bipolar stepper driver from one of Pololu's DRV8825 stepper driver boards. I have followed the recommended minimum wiring diagram, with a 220uF capacitor right across the input and ...
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1answer
35 views

specific driver and motor combination

I am planning to make a 3D printer for a school project and would be grateful for your help. I want to combine the following driver [L298N Dual H Bridge DC Motor Driver IC; Driven part of the terminal ...
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0answers
26 views

Stepper motor holding/cogging torque ratio

I need a stepper that has the highest possible holding torque (when power is on) and smallest possible cogging/detent torque (when power is off). This goes back to the holding/cogging ratio - is there ...
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1answer
37 views

Managing Peak Motor Currents with Capacitors

I'm currently working on a project involving three 90V 5A DC stepper motors controlled by G320 Geckodrives and powered using a single 90VDC 13.5A power supply. I'm working with a mentor who suggested ...
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1answer
56 views

What are the differences between round and square steppers?

I have managed to salvage some round and square hybrid steppers, and I have noticed that the square ones seem to be much more powerful motors. Other than shape, what are the general differences? Is ...
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1answer
59 views

how to add switches to the end of the rotation that will cut off a stepper motor so I don’t damage anything at the extremes of the motion? [closed]

I need to work on how to add switches to the end of the rotation that will cut off a stepper motor so I don’t damage anything at the extremes of the motion. I'm using a Dual - H Bridge to control the ...
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0answers
48 views

Running a stepper motor at less than rated amps, what's the torque?

I have a large round stepper I salvaged that is rated for 5A. If I drive it with a 2.5A driver, how will that affect the torque? Will it cut it in half? Is the effect even predictable at all?
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3answers
81 views

Stepper motor working

I wanted to know why a stepper motor requires a driver board and can't just run directly by a pic microcontroller
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1answer
57 views

Multiple identical chopper drives in parallel

The DRV8825 boards from Pololu come as complete, readymade chopper boards with a current of up to 2.2A. However, I want to drive a bigger stepper motor, and happen to have a few leftover boards around....
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1answer
59 views

How to determine if stepper motor will turn clockwise or counter clockwise initially

Suppose we do not know the state of the rotor initially, then in this picture: How would we apply voltages to coils 1 and 2 in order to ensure that the motor shaft will spin clockwise or counter ...
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1answer
177 views

Using hard disk motor as generator

I have disassembled 20 broken hard disks and taken out the motors, thinking they might be useful. However, they didn't work using DC current, because they required some kind of control circuit. Now I ...
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2answers
175 views

Can I drive stepper motor with AC voltage? [closed]

I want to buy this motor SANYO DENKI 103H7823-1741 for building my CNC I have found the datasheet over here in the website that I will buy it from it says Motor: AC; stepper; 100VAC; step 1,8°; 2....
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1answer
80 views

using power bank to power a nema 17 stepper

I was wondering if it is possible to power this 3.75V/1.7A nema 17 stepper with a power bank which have a 5v/1A output like this one for example . Ps: I am new to the electronic world .
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2answers
87 views

Using a DC-DC boost converter to run a stepper motror through a chopper drive

I am attempting to use a DC-DC boost converter to step up a 7.2V battery to 24V to run a stepper motor, however, I am unsuccessful in doing so. I have tested my stepper using a DC power supply set ...
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2answers
83 views

BYJ48 Stepper Motor- Step angle!

From the datasheet: http://robocraft.ru/files/datasheet/28BYJ-48.pdf and this post: Stepper motors - stride angle? angle I know that we need 4048 pulses to rotate the output shaft for one ...
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3answers
36 views

Reducing give in bi-polar stepper motor axel

I have the NEMA-11 bi-polar stepper motor (http://www.active-robots.com/3322-0-28sth32-nema-11-bipolar-stepper-with-100-1). The issue is that I am able to turn the axel about 5-8 degrees without ...
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1answer
59 views

How to pick a stepper motor

I'm building something that I want to control from mcus, and while I'm fine with the MCU part, I'm in the dark about motors and want to avoid buying too many of the wrong ones while I figure it out. ...
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1answer
99 views

Calculate Current Regulation - DRV8825

I am driving a bipolar hybrid stepper motor rated 1A with a DRV8825 at 12 V. About current regulation the datasheet says: 9.2.2.2 Current Regulation In a stepper motor, the set full-scale ...
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1answer
51 views

What type of motor is more desirable, if the requirement is to rotate a load with high torque by about 30-60 degrees?

Torque required is about 17Nm. The speed for rotation is very small about 10degrees/sec. The load is dynamic and I do not want to apply any torque more then 20Nm, this I want to achieve by using a ...
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1answer
222 views

Stepper Motor works at 5v, driver explodes at 12v?

After i salvaged some stepper motors and read alot about them i finally decided to try them out... But before i did i asked: Simple stepper motor circuit safe? in the above question you can find ...
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1answer
37 views

Switching power supply delays delivering power

I am powering a 1A bipolar hybrid stepper motor driven by a DRV8825 with a 12V 10A switching power supply. There is a 220uF capacitor placed at the motor power supply near the driver. The driver's ...
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1answer
78 views

Stepper motor going one step forward and one backward

I have DRV8825 driver wired like that: And I'm sending high and low signal in loop. Each 2 high signals motor moves one step. And it moves forward then next step backward. Yes, I've tried to switch ...
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1answer
176 views

Simple stepper motor circuit safe?

After various disappointments i finally understood how to find those damn wires on stepper motors. I tought it was simpler to drive bipolar motors but at the end i prefer unipolar stepper motors.. ...