A kind of motor that moves in steps.

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46 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
53 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
40 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
57 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
54 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
60 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
33 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
55 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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0answers
33 views

arduino teensy no true HI-Z available? [migrated]

I am using this https://github.com/watterott/SilentStepStick stepper driver to drive a stepper motor. I am having trouble setting pins to HI-Z/floating to configure the stepper driver. To set the ...
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1answer
55 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
92 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
23 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
45 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
98 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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0answers
21 views

Manual control of a stepper motor using a joystick

I'm building an X-Y table controlled by stepper motors, and would like to be able to control them manually with a joystick for calibration purposes as well as with a microcontroller, switching between ...
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1answer
63 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
38 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
37 views

How to account for missed steps?

Stepper motors have a non-cumulative step error of ±5%, at least all the ones I've seen. How can a missed step be detected reliably?
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1answer
26 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
40 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 ...
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1answer
54 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
83 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
21 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
36 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
55 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
57 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
78 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
53 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 ...
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1answer
57 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
129 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
144 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°; ...
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1answer
68 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
72 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
73 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
35 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
87 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
49 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
215 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
36 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
76 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
153 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.. ...
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2answers
57 views

confusion about the stepper motor rating?

I came across a stepper motor with 10.2kgcm torque, which is ideal for my application. However it says Voltage rating: 3.3V, Phase current: 2Amp If the current rating is the maximum allowed current. ...
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1answer
31 views

Limit current of L6206 bridge driver

I'm currently building my first stepper motor driver, a bipolar stepper, 4.5-48V 1A phase current with 4.5 Ohm phase resistance. I've built the circuit of the L6206 following the "Typical ...
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1answer
145 views

Ramps 1.4 stepper motor Slaving

So I am looking to run 2 stepper motors for x and y axis with a ramps 1.4 board, but since their are only one stepper motor driver per axis i was wondering how to accomplish this? (I'm thinking a ...
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1answer
46 views

How to detect end of avaliable movement of mechanism connected to a stepper motor, without external detectors?

I have access to (not quite working) 3D printer. It has no endstops, no switches that would detect extreme positions of head or table. I know this because I was there when it was assembled. All cables ...
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1answer
57 views

Choosing Stepper Motor - Driver Combination

This is my first attempt at designing/building my own circuit and PCB, so please bear with me. I am building a small, portable device that makes use of a small, accurate motor. My goal is to make the ...