A kind of motor that moves in steps.

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4answers
77 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
18 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 ...
0
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1answer
53 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
27 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
33 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
24 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
22 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
52 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
75 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
34 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
20 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
33 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
54 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
55 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
46 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
76 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
45 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
50 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
98 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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0answers
29 views

arduino relay with 3 motors

I am doing a project where I require to control 2 DC motors and probably 1 stepper motor. The DC motors only have to work in one direction whereas the stepper motor has to be reversable. (the stepper ...
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2answers
120 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
59 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
59 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
66 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
58 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
75 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
47 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
195 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
34 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
75 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
129 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.. ...
1
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2answers
53 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
30 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
113 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 ...
0
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1answer
43 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 ...
0
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1answer
51 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 ...
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1answer
78 views

Strange electrical noise from stepper motor

It's my first project using arduino. Simply trying to rotate three identical stepper motors, using three 293d h-bridges. Although it does work properly (meaning the motors do rotate as they should), ...
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1answer
79 views

calculate encoder period from motor rpm?

Let's say I have a stepper motor which rotate at a speed of 1000 RPM and I have an incremental encoder attached directly to the shaft with 4096 PPR (pulses per revolution). How I can measure the ...
-1
votes
1answer
115 views

Suitable Schottky (Dual) Bridge Rectifier ICs to protect stepper motor drivers

I need to protect a number of 24V stepper motor drivers from cable disconnects as described in "Adding diodes to easy driver stepper motor driver". This means using eight Schottky diodes with a ...
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2answers
58 views

Multi cell lipo charging or boost converter

I'm working on a prototype for a project that needs to drive a stepper motor at 12V and 2A. It needs to be powered by lipo batteries, have all of the charging circuitry in the device, charge through ...
-4
votes
1answer
73 views

FPGA: need a stepper motor controller with smooth acceleration [closed]

I want to connect a stepper motor to my Cyclone V FPGA via a STEP/DIR-interfaced driver. But I don't want to simply give N pulses with F frequency. I want to set its max acceleration and deceleration. ...
0
votes
1answer
130 views

Using a Mosfet Gate driver to directly drive a small stepper motor?

I need to control some small, low current stepper motors from a 3V ARM micro controller. The motors typically require 5-12V at 400mA (30 ohm 41mH windings). What occurred to me is to use a Mosfet ...
3
votes
4answers
130 views

RC car steering circuit: what does it do?

I have just disassembled a RC car. Attached to the stepper motor that controls the steering of the car was a small circuit board with a cog wheel attached to it. I am trying to figure out what this ...
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2answers
143 views

Getting floppy drive stepper motor to work

I want to learn how a floppy stepper motor works so that I can latter control it with my arduino. What I did was to test if the motor in a floppy worked before pulling it off. I used a 5v from my ...
0
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1answer
56 views

Stepper Motor Questions

I am doing a project in school for which I have chosen to use stepper motors to drive a conveyor. Reasons I chose these, and not BLDC or AC motors include their low cost, and ease and accuracy of ...
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2answers
122 views

Why is it harder to turn the shaft of an unpowered stepper motor when connecting the terminals of a phase?

I experimented this phenomenon, but I don't know why. My guess is it has to do with back EMF, but I am not sure how. I found it's also documented on wikipedia: (For the experimenter, the ...
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1answer
55 views

Do stepper motors fail if not allowed to rotate?

I have a rudimentary understanding of the operation of a stepper motor. I have a situation in which a stepper motor will try and rotate something; but if the bar is already in the stop position the ...
0
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1answer
39 views

Step motor intermediate position [duplicate]

Is it possible to change the position of arrow to be a little more to upper winding or right winding? If we supply different values of voltage to two winding what will happen to arrow?
0
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1answer
199 views

Controlling 64 stepper motors with arduino

I have seen many post on this site for controlling stepper motor with arduino. And arduino is pretty good at it if provide with good shield/Driver. My query is How can is use to arduino control more ...