A kind of motor that moves in steps.

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33 views

Help with 8 wire stepper motor [on hold]

Hey guys here is a picture of my 8 wire stepper motor. Unfortunately There is no sign of model number on it. Using a multimeter here's what I found Red - black: Beep Black - white : Beep Red - ...
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14 views

How to detect thermal shutdown of a stepper-motor controller IC?

I am using an A4983 (www.allegromicro.com/~/Media/Files/Datasheets/A4983-Datasheet.ashx) for controlling a stepper motor. Unfortunately this controller does not have an output for signalising me that ...
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84 views

Generating a PWM signal to drive stepper motor

I need to drive a stepper motor with a PWM signal. I am using the Panasonic FP0RC16CT to create the signal. How would I go on about achieving this? What instructions would I use? The signal needs to ...
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17 views

Precise rotational movement and locking [migrated]

I am constructing an autonomous, unmanned boat for voyages of several months. Traditional autopilots use a linear actuator to move the tiller but require several adjustments per minuted, will consume ...
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1answer
49 views

Switching power to Stepper Motor Drive using relay and arduino

1.This project involves use of stepper motor once in 5 mins to perform precise movement.I m driving the Stepper using L298N-L297 Stepper Motor Driver Board and Arduino UNO. Since the Stepper Motor ...
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2answers
65 views

test steper motor without microcontroller

i'm very new for microcontrollers as well as step motors .i have a idea to make a cnc based pen .so i get a step motor with uln2003 stepper motor driver.but i have ...
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1answer
34 views

Problems understanding stepper motor data

I have a stepper motor (M061-CE08) here, and I am a bit disturbed: The manual tells me that it has eight connections, and winding specifications for bipolar parallel connection are 0.89V and 5.4 ...
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2answers
71 views

Correct circuit element alternative to transistors

First please see my proteus file to understand what am I trying to do. http://www.docdroid.net/ru27/yenitasarim.pdf.html As you see, there is 5 button groups vertical and 5 button groups horizontal. ...
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64 views

Does frequency equal the number of steps a stepper motor will do?

http://www.thorlabs.us/thorcat/ETN/ZFS13B-Manual.pdf I am supplying a driving PWM signal to this stepper motor. However, I want to specify exactly how many steps to take with this motor. Does the ...
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1answer
33 views

Can a linear motor output multiple and precise linear forces?

I am trying to identify a motor-driven system that can produce a constant linear force in one direction. The context for this is an injection device that compresses the plunger of a syringe ...
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2answers
84 views

How to reduce the amplitude of my PWM signal?

I'm using a PWM control signal that ranges from 0-24V to drive a stepper motor. However, the datasheet in the driver says it should range 0-5V. How can I bring down the amplitude of my PWM control ...
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1answer
58 views

Power Supply For CNC Setup

I can't quite wrap my head around the power requirements for a CNC setup i'm building. I'm using 3 x Easydriver 4.4 for driving the Sparkfun Stepper Motors. I previously used a 22 V 800ma Power ...
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2answers
46 views

Using transistors to minimize the number of Arduino pins used for this stepper motor driver

Alright, I know very little about what I am currently asking about, but here is the gist of it: I want to build a cnc machine out of some old floppy drives. I purchased a couple L293D dual H-bridge ...
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1answer
78 views

Import alternative stepper motor in my fritzing sketch

I have a question, which is on the usage of Fritzing. I'm trying to sketch up a robot I have made. I want make a proper sketch, which I can send to a manufacture. I found a stepper motor used in this ...
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1answer
242 views

How to determine the rotation direction, rotation angle and rotation speed of a stepper motor and a servo motor

During one of my lab session I faced this problem and couldn't find any good answer. As far as I know for a stepper, Reversing the direction of current will change the direction of rotation. ...
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0answers
26 views

Gecko GM215 stepper motor drivers LED output

I just purchased a new GM215 stepper motor driver from Gecko. I am using it to drive my NEMA23 3A motor with 36V. The driver has a 80V limit. My device worked the first day, very nicely, but the ...
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1answer
40 views

Can I use 7.2v lipoly for 12v stepper motors?

I planned to buy 2 stepper motors for small toy car. What I can find from aliexpress are mostly 12v products. I have lipo batteries already and they are 7.2v and 5400mA. Can I use this for 12v ...
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0answers
41 views

Current spikes when driving stepper motors

I am trying to figure out appropriate values for a timeout mechanism provided by the DRV8811 stepper motor driver. While doing my research I came across a website that conveniently has a write-up ...
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2answers
124 views

Make hard drive stepper motor run 7200 rpm

I have an old hard drive (7200 rpm) motor like this: I'm trying to make it run as fast as possible and I start with this code (arduino uno): ...
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1answer
48 views

Stepper motor current specifications - 12V/350mA, but draws more at lower speeds?

I have on hand a simple 12V/350mA stepper motor the datasheet is lacking, so I can only assume 12V is the maximum sustained voltage and 350mA is again, the maximum associated current. The datasheet ...
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2answers
33 views

CNC stepper motor driving CC vs CV

I am trying to design a small CNC maching for milling PCBs. I am using unipolar stepper motors driven by a microcontroller, but I am unsure of what tehnique to use to drive them. I once read that ...
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1answer
33 views

damage stepper motor energized

General stepper motor question: Is it safe to manually turn a stepper motor that is energized (holding at a fixed position)? Or could it damage the motor in some way? I'm working on an old stage ...
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3answers
65 views

stepper motor driver constant current under load, motor driver powering off losing brake effect

I am building a CNC-like machine using a microcontroller and 'FMD2740A Microstep Driver' modules to drive the stepper motors. My problem is the vertical axis where, despite a counterweight, there is ...
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0answers
39 views

PWM Chopping current and Decay Modes of motor drivers

This is my first experience with driving stepper motors, so please bear with me. I was looking again through the datasheet of the stepper driver DRV8811 and came across calculations that needed to be ...
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1answer
41 views

What is the “Home” feature of the Stepper Motor Driver IC (DRV8811)?

While doing research on efficient methods for driving stepper motors I came across the Texas Instrument IC DRV8811. This particular device has a Home feature that is explained very little. The ...
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1answer
59 views

Stepper Motor current rating and microstepping

I am working with stepper for first time and want some suggestions. Motor runs smooth but the problem is it gets hot after a few seconds. reason may be that i am giving it a bit higher than the rated ...
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1answer
54 views

Dead-reckoning vs feedback for motor position control of turntable

I am constructing a small turntable that holds a plastic cup and should be controlled to stop at one of eight positions. (Where it will receive a shot of liquid; think "Auto-cocktails"). I'm wondering ...
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1answer
50 views

V-I curve for Stepper Motor

I am new to stepper and want to know how velocity-current graphs are plotted for stepper motor. Is the speed graph plotted against the overall current drawn by the motor or it's single winding ...
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1answer
79 views

What is the maximum current at which I can drive my stepper motor?

I am using Oriental's PK-243-03A stepper motor in bipolar series configuration. The rated current of the motor is 0.31A/phase according to its datasheet. My question is if I am supplying it with 12V, ...
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2answers
79 views

How to measure stepper motor current?

I am using Oriental's PK-243-03A stepper motor in bipolar series configuration. The driver I am using is TI's DRV8825. I want to measure my motor's current in order to plot a Speed - Current graph. I ...
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1answer
36 views

Turn Stepper Motor Off when Idle

I was wondering if there is a way to cut power to my stepper motor when it is not in use. I dont particularlily need it to hold its position because in my setup it doesnt really need to torque agaisnt ...
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1answer
80 views

Measuring inductance and ESR of a motor using LCR meter

I am building a circuit, where a MCU will drive an unipolar stepper motor through MOSFETs and constant current source (not included in the schematic). simulate this circuit – Schematic ...
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1answer
43 views

Step size for controlling stepper motor

I am using a PK243 - 03A unipolar stepper motor, its step angle is 1.8 degrees. I am planning to step the motor periodically on it's starting frequency which is coming out to be 1.3kHz, to see how it ...
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2answers
83 views

Why does stepper motor not turn properly at different frequencies?

I have an 8 wire stepper motor and an unipolar motor driver. I wired the motor as unipolar connection. On motor 3.15V and 4.2A is written. My connection is above. When I connect V to 24V 14A source ...
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2answers
371 views

Why do we need a ramp for stepper motor?

I am a newbie and trying to understand how i can run a stepper motor. The concept i had in mind was that steppers need digital pulses to run, and i tried it out too. I was able to run the stepper i am ...
3
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2answers
70 views

Driving a stepper motor to a set force

I am trying to drive a Linear Actuator (stepper motor with a lead screw) to drive until a force of 15 pounds is reached then stop. I am having trouble finding a good method to do this (I am new to ...
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1answer
125 views
0
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1answer
58 views

Bipolar stepper motor sequence, wiring and dual h bridge

Im facing some issues to figure out sequence of my bipolar(specifically) and unipolar stepper motor. However , I've managed to get Dual H Bridge but couldn't find out the example/documentation for the ...
3
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1answer
286 views

Why is my DCDC getting fried when driving a stepper motor

I'm trying to get a stepper motor running using an L6470 stepper driver. L6470 is connected according to the recommended design. The motor is a NEMA23, rated 2A, inductance of 5.2mH and resistance of ...
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1answer
41 views

Per coil vs. per phase current

I'm working on a project using this stepper motor it is rated at 1.5 A/Phase current. Initially I planed of using this driver, so I checked if it can provide enough current for the motor. The website ...
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1answer
116 views

“Standard orientation” for stepper motors in data sheets

I just finished getting a SOYO 6V@0.8A unipolar stepper motor working, and wanted to know more about an issue I faced while doing so. I used the stepping sequence below with an L293D chip to drive ...
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1answer
103 views

Precision 0.5 degree Stepper needed for Turntable

Basically our project brief is to design a turn table, an object weighing around 10kg which will be placed off centre (but allowing around 20kg in case) to rotate in 0.5 degree increments, pausing for ...
4
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3answers
151 views

Is it possible to determine load on a stepper motor when stopped

Is there a way that the torque on a stepper motor can be determined without some kind of additional force sensor. Additional electronics such as current shunts etc would be acceptable. I would like ...
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2answers
123 views

How to tell when the stepper motor is done stepping?

I am working on a project that requires mildly accurate positioning of the x and y axis. It involves an airsoft gun and it is basically a motion tracking turret. Because of the requirements for ...
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0answers
56 views

Stepper motor with integrated circuits and encoder controlled by custom software

I am new to electronics but I have decent experience in programming. What I would like to do is have 2 stepper motors attached to my computer, and then develop a program that would control their ...
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0answers
82 views

Stepper motor to replace brushed DC motor to be used to start a gas engine?

I'm trying to decide if it would be possible to use a stepper motor to replace a current 12V DC brushed motor that is used to turn over a small (~149cc) gas engine for starting. The reason why is, I ...
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1answer
172 views

Bipolar stepper motor (Alfa Romeo 156 speedo) w/ L293D

I would like to use my Alfa Romeo speedo in my simrig, I have got the cluster pinout and the speed signal is coming from the ABS (Just like any other car, my BMW cluster works like charm). The only ...
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1answer
89 views

Current on Easydriver stepper pin

I am using an Easydriver v4 to drive a bipolar stepper motor. The Easydriver works fine, if I wire it up and manually toggle the step pin to 5V/GND it steps as intended. Now I connected both the step ...
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1answer
606 views

Wiring up a 4 pin DVD drive stepper motor?

I have removed a stepper motor from a DVD drive which looks like the following: http://forums.parallax.com/attachment.php?attachmentid=102789&d=1373845076 As seen, there are 4 pins in a ...
5
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5answers
315 views

Can a motor's movement be improved to any arbitrary resolution?

For a project that I'm working on, I need motor rotation at extremely small increments -- my desired resolution is about ~0.15 degrees per minimum rotation step. Of course, most motors of reasonably ...