Skip to content

Rig Closed-Loop Structures

Learning Objectives

After completing this tutorial, you will have learned:

  • How to import a gripper from Onshape
  • How to configure closed-loop articulation structures
  • How to break articulation loops
  • How to add joint drives and mimic joints
  • How to configure self-collision
  • How to control a gripper with OmniGraph

Getting Started

Prerequisites

Estimated Time

Approximately 20-30 minutes.

Overview

In this tutorial, you will import a Robotiq gripper from Onshape, configure its closed-loop articulation structure, add joint drives with mimic joints, and control the gripper using OmniGraph.

Rigging the Robot

Adjust joints after importing from Onshape.

Joint structure

Breaking the Articulation Loop

Convert the closed-loop structure into a form the simulator can process.

Loop error

Loop resolved

Adding Joint Drives

Configure joint drives for actuation.

Adding Mimic Joints

Set up dependent joints as mimic joints.

Collision Meshes and Self-Collision

Configure collision meshes and enable self-collision.

Controlling the Gripper with OmniGraph

Use OmniGraph to control gripper open/close operations.

Summary

This tutorial covered the following topics:

  1. Importing and configuring closed-loop structures
  2. Breaking articulation loops
  3. Adding joint drives and mimic joints
  4. Configuring self-collision
  5. Controlling the gripper with OmniGraph

Next Steps

Proceed to the next tutorial, "Tuning Joint Drive Gains", to learn how to optimize joint drive parameters.