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A stepper motor (or step motor) is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can then be commanded to move and hold at one of these steps without any feedback sensor (an open-loop controller), as long as the motor is carefully sized ...

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1answer
8 views

Tamiya Dual Gearbox attached to an Arduino Uno Board

I'm building a robot that uses the arduino uno microcontroller, and the tracks system is run by the tamiya 70168-Double-Gearbox-Kit. Each Tamiya motor only uses 3V which is fine but it seems the ...
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2answers
61 views

Controlling Stepper or DC motor with L298 or L293 and getting operation similar to Servo for 6 dof arm

I will be using 1:4 gear ratio and thus will require a motor with a continuous 360 motion and a high torque for efficient functioning. Servo motors with continuous rotation and high torque are very ...
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2answers
49 views

How to move a Stepper Motor to a desired angle with raspberry pi?

I will be using stepper motor in 6 DOF robotic arm along with Servo motors. Unlike Servo motor ,I find difficult to control Stepper motor. I was earlier using only Servo Motors but due to lack of ...
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0answers
21 views

Separation of motors from movement

I have a large 1m diameter metal sphere. It has a fixed hollow rod drilled through the bottom of the sphere side and reaches to the middle of the sphere. I wish to move something in a x and y ...
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1answer
47 views

Which motor to use for self-balancing-bot?

I am building a self balancing bot using MPU-6050 Arduino Mea 2560 100 rpm 12V DC motors Currently I have used two 100 rpm DC motors in the bot. The pwm signal is given to the bot on the basis of ...
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1answer
23 views

Motorised Stage for laser

The problem I want to be able to move the direction a laser is pointing. This means I need to have motorised rotation of the laser head in the x direction and in the y direction. I am unsure of the ...
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0answers
22 views

Motor solution for being able to precisely detect location of changes in torque

I am looking to make a robot with a motor that can: a) Rotate to an arbitrary position very precisely (accurate to about 1/1000 of a rotation) b) Detect small changes in the torque of what it is ...
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2answers
37 views

raspberry pi operating a unipolar stepper motor with a L293D IC

I need some help with a project where I am trying to operate a unipolar stepper motor with a raspberry pi's using the 4 GPIO pins and using a L293D IC as an amp to get it to the operating 12V of the ...
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0answers
24 views

Is missed step detection of a stepper motor done is software or hardware?

I remember seeing a video of the Prusa i3 Mk3 printer. It can detect when the stepper motor misses a step, so it can home itself again. I would like to know how this is done! There are a few options ...
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1answer
163 views

L298N driver takes too much current

I'm using L298N motor driver to spin stepper motor (42BYGHM809). When connecting it to batteries(2*9v), the batteries heats up after few minutes and stop working, and when connecting it to power ...
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0answers
15 views

Compress a spring with Makebock parts

I would like to build a mechanism with Makeblock parts, which would compress a 10N/mm spring with relative precision (max 200N on 2cm). I have several ideas in mind, but I am unsure which is the best ...
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0answers
14 views

Choosing motor for shake/push pull action?

I'm looking forward to choose motor for shake or fast push/pull action. On this video you can see example motion on 3:04. I read linear motor does that but looks like much slower. What kind of motor ...
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2answers
52 views

How to reduce the small free rotation/movement of a stepper motor shaft?

I was successful in running a 28BYj-48 stepper motor with 4096 steps per revolution. I am happy with the result. But there is a free movement of the motor shaft itself - you can move the motor shaft ...
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2answers
201 views

DC geared Motor 20 NM 25 RPM small dimensions. [closed]

My application requires a DC geared motor with torque of 10 NM - 20 NM and low speed (25 RPM at most) and a small dimensions (120 mm length at most). I failed to find my specs at eBay, and Alibaba ...
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1answer
624 views

Using brushless motors for very high torque

I'm currently building an robotic arm and I want the elbow joint to be comparable to a human one But here's the problem, electric linear actuators are too slow and have low torque, same goes with ...
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0answers
126 views

Kinect V2 (Arm/Hand Reading) to G-Code

I am very new to this space and would greatly appreciate some clear guidance. I have a Raspberry Pi 3, Arduino Mega 2560+Shield, and Kinect v2 + PC USB cable adapter. I am currently building the ...
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0answers
165 views

How do I choose the stepper motor torque for my robotic arm

I'm a communication engineer so my knowledge about robotics is very little. I know the basic formula of torque T=mgL in my project I have 2 arms & 2 motors i used a torque calculator online ...
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2answers
795 views

How can I calculate speed and torque of stepper motor screw

I want to choose stepper motor screw with slider for use it to shift cube with side 5 cm and wight 250 g . I found this motor .. how can I calculate speed and torque of slider
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2answers
1k views

How to calculate my power supply voltage and current?

My stepper motor specifications: Phase = 2 step angle = 200 step/rev voltage = 12 V current = 0.33A/phase resistance = 34ohm/phase Inductance = 46omh/phase holding torque = 23N.cm min detent ...
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0answers
42 views

Design of an equatorial mount [closed]

I am considering designing an equatorial mount for astrophotography. I have been researching on the best way to do that and I am thinking on using a stepper motor with a gearbox. The thing is that it ...
0
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0answers
57 views

Stepper motors work on 12V 2A SMPS, but not with 24V 5A SMPS

I am trying to drive NEMA 23 motors with 13.5 Nm torque rating motors in my project by following to the tutorial How To Control a Stepper Motor with A4988 Driver and Arduino I have made a ...
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0answers
26 views

Stepper Motor Torque [duplicate]

Tried searching for this answer in a simple way but can't seem to find the answer.. I have a 3 axis Bipolar Nema 17(Took off my 1st 3d printer =) ) robotic arm(Homemade) and provides 28oz-57oz of ...
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0answers
18 views

Detecting “zero” when turning a potentiometer from a stepper motor [duplicate]

We're using a stepper motor to control a knob on a piece of audio equipment. The stepper is coupled to the potentiometer shaft with a simple coupler. Right now, in order to get to "zero" on the ...
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0answers
44 views

Stepper Motor For “Cable Car” System

I am a programmer with a lot of experience in IoT but somewhat new to actuators and robotics. I would like to create a "Cable Car" which consists of two stepper motors and a pulley. The motors would ...
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1answer
137 views

Servo coupler size needed

Hey all I would like to know what type of coupler I would need for this type of servo? The specs are: I'm guessing that the 25T means it has 25 teeth in the part that holds the adapters? So I would ...
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1answer
47 views

Will this have more or less lifting strength

Bit of an engineering question. If a snake robot is 100 cm long, and every 10 cm is another motor. Would the robot lift more weight, the longer/more motors attached to it.. or is lifting ability ...
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1answer
174 views

Why are some motor shafts stiff while others spin freely when not powered?

Most servos and steppers I've worked with are able to spin manually when no power is applied, but I've come across a couple which are stuck in their position. I'm not sure if they are just very ...
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2answers
380 views

What stepper motor driver to use?

I want to control a DVD drive's stepper motor with an arduino uno, but at the moment I'm not sure what kind of motor driver will work for that. I am currently looking at this one I have no idea ...
2
votes
1answer
36 views

Going around Voltage Limitation on Battery for Steppers?

Am building a device that will use two stepper motors and a servo. One of the main requirements, is that the on-board battery cannot exceed 9.6 volts. The stepper motors have not been picked yet, and ...
6
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3answers
2k views

2DOF arm with quick movement: Stepper, servo, or DC motor?

To make a two degree of freedom arm capable of speeds needed to play air hockey, how should the arm be controlled? I'm wondering about speed vs accuracy. The following image is from a project ...
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1answer
170 views

Which kind of motors and how powerfull should they be for a robotic arm

I am building a robotic arm with these specifications: 1 meter long approx. 1kg weight it is made of 4 motors. (2 at the base. One for rotating the whole arm left and right and another one for ...
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2answers
3k views

Using a six wire stepper motor with L298n

I am using a L298n IC and (not a driver shield) and an Arduino. I would like to know how to use the IC with the Arduino to run a six wire stepper motor. Could I have a detailed explanation for ...
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2answers
66 views

What is the best way to plug in more than 3 stepper motors into a Arduino Uno board?

I'm developing a 5 axis robotic arm with stepper motors and I am getting around to ordering most of my parts. I plan on using 5 EasyDriver shields to drive all of my motors. I am also planning on ...
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2answers
406 views

What kind of torque is needed for a small 5-6 axis robotic arm?

I'm new to robotics and I'm looking to make a 5-6 axis robotic arm out of stepper motors but I honestly don't know how much torque I should have for each part. Below I have described in more detail ...
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1answer
3k views

How to find Friction or Viscous force b (nmsec) in DC motor

PLease guide me How to find Friction or Viscous force b (nmsec) in DC motor for a particlar speed. The motor is connected with a gear and the ration is 26:1 I want to find for 200 rpm and the motor ...
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1answer
59 views

Which mechanical device could repeatedly present an ID tag to a card-reader

I'm trying to build a test-automation robotic arm which can repeatedly present an ID-tag (such as RFID or NFC card or fob) to a card reader. I suspect our reader fails either (a) after hundreds of ...
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1answer
55 views

Choosing stepper motor for hand

I'm developing a robotic hand, and decided to place motors inside joints (as in picture) and I'm stuck with finding a stepper motor that can fit there. Approximate size of motor body is radius - 10mm, ...
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1answer
72 views

A simple function plotter project

To plot any curve or a function on a paper we need points of that curve, so to draw a curve, I will store a set of points in the processor and use motors, markers and other mechanism to draw straight ...
3
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1answer
231 views

RC car circuit: what does it do?

I have just disassembled a RC car (a BBR 1:18 Scale Ferrari Enzo from 2005). Attached to the stepper motor that controls the steering of the car was a small circuit board with a cog wheel attached to ...
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0answers
69 views

Panasonic MSMO22F2G (stepper motor hook-up)

I have a Panasonic MSMO22F2G Servo Motor that I'm using as a stepper motor. The motor has 4 wires coming out of a port farther to the front, and 11 wires coming out of a port towards the rear of the ...
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3answers
176 views

How can I increase the resolution of a PWM signal?

Say I have a motor and I want it to spin at exactly 2042.8878 revolutions per minute. Say I have a very precise sensor to detect the RPM of the motor to a resolution of 1/1000th of a revolution per ...
4
votes
2answers
539 views

What is the required theory behind building a robotic arm?

I am currently planning on building a robotic arm. The arm's specs are as follows: 3 'arms' with two servos each (to move the next arm) single servo clamp mounted on revolving turntable turntable ...
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2answers
166 views

Crock Pot Knob Turner

I have a Crock Pot with an analog knob and would like to find a way to turn the knob by using and appliance timer. I have no idea where to begin. I need help. Thanks
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2answers
402 views

4dof or 5dof robot arm with stepper motors tool-chain for an hobbyist

In the past I built some simple robot arms at home, using RC servo motors or stepper motors (till 3dof). I would like to build a new arm with 4dof or 5dof with the steppers. Until now I used Arduino ...
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3answers
498 views

Can RC servo motors continually rotate?

I know that RC servo motors are designed for precise movement, rather than a D.C. motor's continual rotation. Are most RC servo motors limited to movement within one rotation or can they actually be ...
2
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2answers
2k views

What is required to build a simple XY-stage?

In the scope of my PhD, I would like to build an automated microscopy set-up that should take images of a sample of 2cm by 2cm. This should be done by taking pictures of 500 micrometers by 500 ...
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1answer
126 views

Can I use Bipolar stepper motor driver to drive Unipolar motor in Unipolar configuration?

Can I use Bipolar stepper motor driver to drive Unipolar motor in Unipolar configuration ?
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0answers
3k views

accelerate a stepper using arduino AccelStepper starting with a pre-defined speed

I've read the AccelStepper documentation on airspayce.com and it seems to be not possible to accelerate a stepper starting with a speed greater 0. Acceleration always starts from speed=0, I tried it ...
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2answers
636 views

Building industrial-like robotic arm

I would like to build a 70cm articulated robotic arm (not a scara one) that can lift between 10kg and 15kg (10kg would be awesome already, this payload includes the weight of the arm+gripper) and ...