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The Dynamic tools section is intended to provide users with both basic and advanced equations used in robotics. The tools presented here are applicable to robotics in general.

## Vehicle Speed, RPM, and Wheel Diameter Finder

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Use this tools to compute, the resulting robot speed, the required motor RPM, and the corresponding wheel diameter. Solve for Vehicle Speed: Equation: Speed = (RPM (diameter * PI) / 60) Solve for Motor Speed: Equation: RPM = ((60 * speed) / (diameter * PI)) Solve for Wheel Diameter: Equation: Diameter = ((60 * speed) […]

## Unit Conversion Tool

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Instructions: Select the appropriate unit and enter a value to be converted. * Note: Weight (force) and mass are different entities. To convert mass to weight, multiply by gravity (9.81 m/s^2 or 32f t/s^2). ** Note: Although kg-cm is used throughout the RobotShop site, it is actually kgf-cm. Similarly, oz-in should actually read ozf-in throughout […]

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## Robot Arm Torque Calculator

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The Robot Torque Arm Calculator is intended to help you choose the right motor for each joint of your robotic arm. The torque (T) required at each joint is calculated as a worst case scenario (lifting weight at 90 degrees). Ensure your units are consistent. Most common units are kg-cm and oz-in. Take a look […]

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## Drive Motor Sizing Tool

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The Drive Motor Sizing Tool is intended to give an idea of the type of drive motor required for your specific robot by taking known values and calculating values required when searching for a motor. DC motors are generally used for continuous rotation drive systems, though can be used for partial (angle to angle) rotation […]

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## Robot Arm Torque Tutorial

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This tutorial is intended to complement the Robot Arm Torque Calculator found in the Dynamic Tools section of GoRobotics. The equations used in the calculator to determine the torque required at any given lifting joint (raising the arm vertically) in a robotic arm are presented here. Note that the term “actuator” is used rather than motor because […]

## Robot Leg Torque Tutorial

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The Robot Leg Torque Tutorial is intended to compliment the RobotShop Leg Torque Calculator found in the Dynamic Tools section of the RobotShop Learning Center. This tutorial explains how to find the torques acting at each degree of freedom of a 6-legged (hexapod), 3DOF / leg “insect” robotic leg. Hexapod (6-legged) robots are most commonly […]

## Drive Motor Sizing Tutorial

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This tutorial is intended to complement RobotShop’s Drive Motor Sizing Tool by providing you with a step by step explanation as to the calculations behind the dynamic tool. In the image below, half a mobile robot is shown. Although in this scenario only two out of the four wheels are driven, the equations below can […]