Questions tagged [servomotor]

A servomotor is a closed-loop servomechanism, typically used in industrial applications. It usually consists of a motor coupled to a sensor (e.g. encoder) for precision position feedback, typically using a low ratio gearbox or direct drive.

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stepper or servo torque in one direction only

I would like to ask if it is possible and how (ideally with a stepper) to have it hold torque if I attempt to turn it mechanically (from its axis) in one direction, but be able to rotate freely (when ...
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Finding torque equation for my robotic arm

I am designing a 5 dof robotic arm, and for that I would like to find a torque equation. However, I am a little confused here: According to me the torque equation for M1 should be l2m2+l3m3+l4m4+l5m5 (...
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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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What should be the required operating voltage for Servo motors in my 5 DOF robotic arm, with 50 kg payload

These are the estimated torque values of all axis in our applications 1st Axis- 226.57 oz-in - 478oz-in 2nd Axis- 756 oz-in -1590oz-in 3rd Axis- 356 oz-in - 749.7 oz-in 4th Axis- 188 oz-in - 395 oz-...
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Controlling high torque servo motors with Raspberry Pi

I need to control 10 Standard Servo Motors (operating at 4.8-7V/300mA-1A/2.5kg-5kg torque) in my project. I'm using RPi as my processor and I was looking for a servo driver. I came across PCA9685 16-...
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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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147 views

How does the "rated torque" for a gear relate to the maximum torque?

I have just sized the DC motors I want to use (corresponding to my robot and its intended applications - my figures include a 50% uncertainty factor to account for friction in reducers and other ...
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446 views

Advice on mounting a servo for a nerf sentry gun

I am trying to make a nerf sentry gun to shoot my co workers. I am building it more or less from scratch and have come to the part where I need to come up with plans to assemble it. I am looking for ...
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robotic arm 6 dof with 3 kg payload

we are building 6 DOF robotic arm with a 3 kg payload and i don't know how to select a motor for that i am thinking of using a servo motor but which to use is the problem
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How to calculate operating torque and holding torque of a slew drive for a manipulator arm?

Hope you are doing good and enjoying your weekend. I have a question regarding calculation of torque and tilting moment for a slew drive. Slew drive (motorised) will be used at the base of a ...
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Tractive torque calculations for rack & pinion drive vertical lifting

What all factors should be considered to find out the required torque to lift 60kg load body vertically with 4 pinions engaging on rack without any other supports. How much factor of safety should be ...
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Power pack and servo driver for robotic arm?

I have a robotic arm that uses about eight 7.4 volt volt high torque servos. (https://www.servocity.com/2000-series-dual-mode-servo-25-2/) I need to know what Kind of battery system I can use to power ...
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38 views

Reducing stress on servo axle

I am designing an articulated robot arm that will not need to hold essentially any weight at its end, but that will need to perform thousands of repetitions (currently using MG 996R servos, but might ...
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111 views

Serial command receiving failure with Arduino and Adafruit shield from C# desktop application

For a long time I use Arduino Uno controller and Adafruit Servo Shield with 6.3V 1000 uF capacitor, powered with 6V 8Amp adapter to control 8 digital servo motors ...
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169 views

Servo motor torque

I am confused with the torque ratings of servo motors, or I guess it is general while choosing any motor. For example a servo's torque is rated as 10kg-cm, so does that mean it can handle a 100N ...
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44 views

Relation between PWM frequency and torque

I am using Pololu G2 18v15 to drive a maxon motor. The motor is supposed to drive a load in a sinusoidal trajectory against gravity with maximum torque of 0.0634 NM with max speed of 5 rpm. I am using ...
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191 views

are mg996r servo failures common?

I am new to the small servo area. I bought a eBay 6DOF Robotic Arm, and 12 mg996r servos to go with it. Using an arduino and I2C PCA9685 16 X PWM board, with the example code from adafruit, I set up ...
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Fetching encoder value with SimpleMotion library by Granite Devices

Is it possible to fetch the current encoder position of a drive with the old SimpleMotion library (not V2) and a Granite Devices VSD-E through the smRawCommand(...) ...
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1answer
100 views

Problems connecting to the Granite Devices USB6AX motion controller

I am working on a setup from 2008 with a 6 axis USB motion controller and 4 vsd-e drives very similar to the setup shown here. The motion controller board is exactly the same as in the first post of ...
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321 views

(Dynamixel) Inverse rotation direction

I'm wondering if there's a feature to "flip" the rotation direction with Dynamixel (I'm using MX-106). For example, if I give +1.57 to the motor, then it interprets it as ...
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151 views

Motor controller for two Hitec D845WP servos

I am undertaking a project using two Hitec D845WP servos running at 8.4 V. Hitec's website lists idle current of 30 mA, no load operating of 1600 mA, stall current of 10 A and ...
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63 views

3 arm robotic claw

I am attempting to design a 3 prong robotic claw for a robotic arm I am working on. I am planning to use sg90 servo motors, but I can't get my current design to work. My current layout is to use one ...