Servo Gun Setup - Pressure Calibration

In this video, we will go over the complete pressure calibration procedure for servo guns, an essential step in ensuring accurate and reliable welding operations. Pressure calibration is critical because it establishes the relationship between motor torque and the pressure applied at the weld tips. Every gun and motor combination is unique, so localized measurement is the only way to achieve precise results.

We will start by explaining why pressure calibration matters and how it impacts torque and speed settings during spot or press motion instructions. You’ll learn about the tools required, including the force gauge or load cell, and how these devices help measure the force applied by the weld tips. We’ll also clarify why FANUC software refers to pressure even though the correct engineering unit is force.

Next, we will guide you through navigating the pressure calibration menu on the robot controller. You’ll see how to set essential parameters such as pressuring time, gauge thickness, pushing depth, and the opening value after pressurizing. From there, we’ll demonstrate how to input torque percentages, adjust tip speed, and take accurate measurements using the gauge in tracking mode.

Requirements for Pressure Calibration:

• A properly configured servo gun and auxiliary axis
• A force gauge or load cell for accurate measurement
• Access to the robot’s pressure calibration menu
• Safety enabling device for secure operation

What You Will Learn:

• How to set up and execute pressure calibration trials
• Best practices for entering torque percentages and recording pressure values
• Tips for avoiding overcurrent faults and motor overload
• How to verify calibration points and ensure system accuracy
• The role of over torque protection and collision detection during calibration

By the end of this video, you’ll understand how to create a complete pressure calibration table and why this process is vital for maintaining your servo gun’s performance. This knowledge will help you reduce downtime, improve weld quality, and keep your equipment running efficiently. Whether you’re setting up a new gun or performing routine maintenance, mastering pressure calibration is a key skill for any automation professional.