Knowledge Base

How to Install or Uninstall a URCap in Universal Robots

A step-by-step guide for properly adding or removing a URCap.

Context

This article explains how to install or uninstall a URCap on a Universal Robots (UR) robot. A URCap is a software plugin that adds specific functionality to your robot, such as hardware integration or new commands.

Important: Some URCaps are downloaded as ZIP folders containing multiple files. To ensure successful installation, you must extract the .urcap file before copying it to your USB drive. The robot will not recognize a zipped folder.

Information

✅ 1. Download the URCap

Download the URCap package from the supplier’s website (e.g., Robotiq’s Support Page).

✅ 2. Check if the file is zipped

Locate the downloaded file on your computer.
If it is a .zip folder, extract the contents first.
Inside, you will see the actual .urcap file and possibly other files (like Release Notes).
Only copy the .urcap file to your USB drive.

✅ 3. Copy the `.urcap` file to a USB drive

Use a USB drive formatted to FAT32, if possible.

✅ 4. Insert the USB drive into the UR controller

Plug the USB stick into the robot’s teach pendant or controller.

✅ 5. Install the URCap in Polyscope

For CB-Series robots:

On the robot’s teach pendant, open the Setup Robot tab.
Navigate to URCaps Setup.
Click + Add URCap and select the .urcap file from your USB drive.
Restart Polyscope if prompted.

For e-Series robots:

On the teach pendant, tap the hamburger menu (☰) in the top-right corner.
Go to Settings > System > URCaps.
Tap + Add URCap and select the .urcap file from your USB drive.
Restart Polyscope if prompted.

✅ 6. How to uninstall a URCap