Questions tagged [motor]
Without qualification 'motor' is usually taken to mean a rotary electromechanical motor, typically either a brushed or brushless design.
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Difficulty with tuning motor PID controller [closed]
I am struggling for a while now with tuning PID control on my motors. I have bought different motor driver boards better motors etc but still I am unable to get a good control on the motors.
What I am ...
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How to calculate the required torque of motor for bipedal robot
I just create a bipedal robot in SolidWorks and after I got all components, I realise that I need select the correct motor for the robot. There will be four motors equipped in the robot, two for hip ...
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Barrel with slot, that can slide
Image sourced from: Huygens optics YouTube channel : Maskless Wafer Stepper Part 2: Mechanics @ 7:40
I need to couple a stepper motor to a leadscrew that will be translating back and forth. One ...
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Will increasing voltage on brushless DC motor increase torque, if speed is kept constant?
I have a brushless DC motor that takes as input voltage 12-60V. If I want to drive the motor at a constant RPM, will increasing the voltage also increase the torque? For example, if I drive the motor ...
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How to design shafts and select bearings
I am trying to design robotic joints for a SCARA arm, I am mainly missing information about the shaft and bearings components.
Design would be similar to MakerArm / Dobot M1 kickstarter projects.
So ...
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Should I be using the old clutches with VEX 393 motors?
I am posting here because the "official" Vex forums don't seem to support EDR anymore :-( but anyhow...
I am teaching a class and we are using VEX parts to build a simple winch, the whole ...
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How to design a representative drive cycle based on speed, acceleration, and torque requirements?
I recently came across the topic of "drive cycle design". I would like to learn more about this as I delve into motor and RC vehicle design.
Given: the RC vehicle must achieve 25mph max/...
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How can such a small motor produce so much torque?
I have only recently gotten into robotics - so I'm not that familiar - please excuse me if this is a silly question.
I was looking at servo and stepper motors. I can see that a lot of servo motors ...
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How to find coefficient of friction that will maximize torque?
When using DC motors with a drive wheel (aka "direct drive") to propel a vehicle (e.g. an RC car), force and torque play a role in how efficiently that motor's power is transferred into ...
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Adapt D shaft to double-flat hole
I need to find a way to couple the D shaft of a gearmotor to the double-flat hole of a wheel.
The model of the motor is this one.
And the wheels are these ones.
The diameter of the D shaft of the ...
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How to maximize top speed potential for a given motor? [closed]
I have an engineering background however I am new to motors. I am looking to understand what the options exist for maximizing the top speed a motor can produce (say for an RC vehicle) without simply ...
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What is the type of electric motor that can lift 1.6 kg just like micro servos, but without the reduction gear?
Micro servo motors, normally the 9g type can lift 1,6kg with a reduction box made of nylon.
However, I'm interested on lifting this amount of weight (1,6 kg) in a faster rate in the axis of rotation (...
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What parts are needed to mount a dc motor on lawn mower wheel for direct drive
I am used to working with robot tire kits that come with a wheel, an axle having a hub on one end which mounts onto the wheel hub and the other end which is bored and mounts directly to a motor shaft. ...
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What DC motor is fit to replace this AC one?
I've a machine with this motor:
I would like to swap this one with a DC motor in order to have better control, maybe a stepper one so that it could be controlled via an arduino board and a dedicated ...
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Trajectory tracking for a robotic arm
I want a robotic arm to do trajectory tracking in the joint space. Suppose the waypoints are
$$
[t(0),q_1(0),q_2(0),q_3(0)],\\
\cdots,\\
[t(n-1),q_1(n-1),q_2(n-1),q_3(n-1)]
$$
I already know that I ...
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H bridge duty cycle vs maximum voltage
I've just burnt out an L298n H bridge, not surprising, but I thought it'd be ok for low load testing. Apparently not.
I'm considering ordering these to replace them - Hilitand DC 5-12V Motor ...
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Stabilizing water bucket with two retractable cables and motors
I am trying to design a system in which a bucket of water is held by two cables, lifted up/down while remaining stable. The cables can be retracted/detracted by two individual motors, controlled by ...
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Can you increase resolution/accuracy by mechanically averaging two actuators?
I'm working on a project using hobby servos to drive a revolute joint, and the servo mechanism doesn't seem to respond when I command a motion of less than about 1 degree. I want to increase the ...
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Impact of using PID Output as a Change (Delta) vs Absolute
I am trying to control speed of a motor using PID. It seems like I have two approaches.
Using PID to calculate the absolute duty cycle value of the PWM
Using PID to calculate the change needed in the ...
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What motor controller board is this?
I was watching a Mark Rober video in which he shows a prototype of his robot, does anyone know what the board in the attached screen-grab is?
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What kind of motors do industrial robot have?
What kind of motors do industrial robots use and how do you control them?
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Sample code for L298N H bridge Arduino Motor Driver not working
I am quite new to robotics, arduinos, motors and that sort of thing so there is a very strong chance I am missing something very obvious. However, I have looked up multiple tutorials online, none ...
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Q: Motor sizing for reeling application
I would like to ask for some help.
My application is regulation of vertical speed of the camera, which is mounted on winding/unwinding reel. The camera follows the object (which moves vertically).
The ...
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Will using a 1:50 cycloidal drive on a 10,000 RPM brushless motor actually spin the output shaft at 200 RPM with 50x the torque of the motor?
In short, I'm trying to build a high-torque and high-RPM robotic arm, and I think brushless motors are the best compromise. The motors I'm considering are 400KV, and are supposed to run on 6S. Are ...
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Precision/Repeatability issue with XArm6
I have a robotic setup with a XArm6 robot and camera facing up with vision algorithms.
I noticed that after a collision or power glitch the robot gets offset. X, Y and Z and angle change according to ...
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From speed vector to motor control
I'm working with Mona robot (image bellow).
The movement is controlled by settings the speed of each wheel.
I'm trying to find a way to convert a speed vector into motor control so that the robot will ...
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How to avoid oscillations caused by backlash in position control?
I am working with a ball screw mechanism driven by a brushless dc motor with an encoder mounted on the load side. We are using a PID position controller with tuning settings by optimization however ...
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The Optimal Reduction Ratio
Hello everybody. For my robot design, I would like to utilize the most optimal gear ratio that I can use. For that I want to utilize the torque of my motor which is a linear function of rpm. This task ...
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Efficient control for BLDC 3-phase motor with BEMF using Arduino (Atmega328pb)
Working on developing efficient code for driving a BLDC 3-phase motor with BEMF feedback using Atmega328pb,
The code is based (as a starting point) on this tutorial: Link
The basic understanding is to ...
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4-Wheeled Mobile Robot, Motor-Torque, RPM Calculation
I want the torque, rpm of every motor to be used considering certain factors, in a 4 wheeled robot as you see in the picture below.
Here are the factors affecting motor specifications that I Had ...
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How to calculate holding and operating torque at the base?
Could anyone please help me with the formula to calculate the operating torque and holding torque at the base to rotate the structure on top of it as shown in image with white arrows?
Thank you in ...
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Outer Position Loop to Control Inner Velocity Loop
I'm trying to control the position of a brushless DC gearmotor. To drive the motor, I have a controller box that provides a velocity that is proportional to a 0 to 5 V input. The motor has it's own ...
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How to measure an optical encoder resolution and gear ratio?
I've bought a DC geared motor with an optical encoder. The vendor didn't provide specification. I can read MITSUMI M25N-2R-14 2241 and 25GA-370-12V-330RPM on the motor. There are some pages on the ...
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How to drive a motor by Python
I need to drive any small motor (with small delay) by Python without low level programming. What hardware and software I need? Does "Robot Mesh Studio" fit for this? I want to make a robotic ...
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DC motor modelling with Bond Graph
I am trying to construct an equation that describes the output torque as a function of lambda and omega
I have obtained the following bond graph but I am unsure of how to proceed.
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Connect LiPo battery to Arduino Motor Driver Shield for RC Boat
Thanks for taking the time reading this question! It is greatly appreciated.
What are we doing
We (two complete noobs) are building a remote controlled boat from scratch using Arduino compatible ...
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How to attach plate to stepper motor?
Total noob here (never touched Arduino before today), & have pretty much no hands-on technical experience (although with lack of experience, I make up in enthusiasm to learn!)
Question: How do you ...
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Equations of motion in matrix form and energy consumption
I am working on Lagrangian derived high-dimensional motion equations for a robot in matrix form. The structure of such an equation is known:
$M(q)\ddot{q}+C(q,\dot{q})\dot{q}+G(q)=0$
In here, $M(q)$, $...
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I need to make something that can slam something into something else really fast in both directions
I'm fairly new to robotics, but I have this idea for a machine. I've done a bit of research but can't find exactly what I'm looking for. I need something that can either move back and forth at at ...
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Why use timing belt drives in Stepper Driven Robotic Arm
This may be a noob question. I am sorry if it is but I am new to this field. I am working on a design of SCARA Robot and I am using Stepper Motors to drive it. In many youtube videos, I have seen that ...
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Find viscous friction for DC motor transfer function
How do I find the viscous friction for my DC motor without measuring the input current and output torque.
I have to do a theoretical model on simulink and can't find any answers on how to find it
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gear motor with encoder and Arduino Uno
I'm working on a project where using a gear motor with an encoder and an Arduino Uno. I have not done Arduino in a long time and am struggling getting it to do what I want. If you look at the wiring ...
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Why Hydraulics and Not Motors?
I have noticed everywhere that professional robotics companies use hydraulics over electric motors. I want to know why that is. Why can they make custom electric motors that are really powerful. ...
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Torque required to rotate arm with mass at end
I have to calculate the required torque to rotate a point mass of 15N on the end of an 1.2m long arm which I have calculated to be 10kg in mass. The rotation must have a constant angular velocity of ...
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What network protocol/control units are motor-based robots controlled with?
I know most vehicles are controlled via CAN (Controlled Area Network) protocol through an ECU (Electronic Control Unit) which send/receives data using this protocol and then sends/receives Amps/Volts ...
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What type of electric motor and speed-controlled circuit do I use to bounce a hanging, 5 pound weight? (it's for a Halloween decoration)
I'm trying to make a roughly 5 pound, hanging halloween decoration bounce on a string from about 1-3 times per second, preferably at variable speeds if I can.
I've looked up a simple DC motor circuit ...
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Smart Servo Motor Type Comparison
I have been using the standard MG90/SG90 servo motors for years now and am familiar with them. Recently, I am trying to build a robot dog with them with no success. The motors keep on vibrating and ...
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Voltage not registering when motor is connected?
I'm trying to fix my kid's power wheel. When you press the gas pedal, nothing happens. I took it apart and checked everything. I noticed that when I disconnect the wires from the motor and check them ...
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PID controller for motor speed control and distance control
I am building a robot rover comprised of dual DC motors each with hall sensors to obtain rotaional speed. I currently have a PID controller for each DC motor that is able to control the speed of the ...
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Make servo's shaft longer [closed]
I’ve got a few servo motors MG995, MG996R, etc.
For my make I need a servo to have a longer shaft – 6cm or so.
I cannot find a way to achieve it.
There is lots of Shaft Coupler for steppers and DC ...
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