Subscribe

Latest Blog Post

New Call-to-action

Transient VS Quasi-Static: Understand the Different Contact Types in Risk Assessment

Mathieu Bélanger-Barrette
by Mathieu Bélanger-Barrette on Aug 16, 2016 7:00:00 AM

Since collaborative robot safety is a huge concern for our end-users, we thought it was important to release some content on this subject. You may already have taken a look at our different eBooks about safety for collaborative robots. This time, we thought that explaining safety concepts with short  videos would help you figure out a couple of additional details. 

This first video is about the difference between two types of impacts listed in the ISO/TS 15066. In fact, quasi-static and transient impacts can both occur when working alongside a robot co-worker. 


Quasi-Static

A quasi-static impact occurs when the robot crushes a human's body part against a fixed object. In this video, we illustrate this example by demonstrating the robot crushing the hand of the worker against a table. 

Transient

This type of impact occurs when the robot enters in contact with a human's body part without any restrictions. In other words, the body part can move freely under the robot's force. 

hand.png

Why Do I Need to Know that? 

Well, as you probably figured, a quasi-static impact can be a lot more harmful than a transient impact. Since the ISO/TS 15066 standard has differentiated these two types of impacts, they also defined different pain thresholds for each type. The general rule is a transient impact can apply a force two times higher than a quasi-static impact. For example, if a robot crushes your hand against a table, a maximal force of 135N should be reached before reaching the human pain threshold. In the other case, in a transient impact, a force of 270N can be reached before getting into the pain threshold. 

We also posted a couple of other videos that can help you understand some other safety concepts. Stay tuned for more content on collaborative robot safety. 

Other Videos

Pressure Calculation

Risk Assessment Process

 

 

 
x

Subscribe to Robotiq's Blog

Leave a comment

Mathieu Bélanger-Barrette
Mathieu works as the production engineer at Robotiq, where he strives to constantly optimize the production line for Robotiq Grippers. Mathieu is always looking for new manufacturing processes to make operators as efficient as possible. He is also seeking out new robotic applications and their effect on improving our world, then keeps Robotiq’s blog readers updated on his finds.
Connect with the writer:

Related posts

Why Humans Should Stop Worrying About Robots Taking Their Jobs

When the topic of robots in manufacturing comes up, the first thing people talk about is a fear of losing their jobs to robotic...

Mariane Davids
By Mariane Davids - June 19, 2017
What's New in Robotics This Week - Jun 16

Manufacturing & cobot roundup, the Tertill launch, Softbank-Boston dynamics deal, 2060: It begins and much more! We hope that...

Emmet Cole
By Emmet Cole - June 16, 2017
How Today's Collaborative Robots Are Cheaper Than Fenced Options

Until recent years, robots in manufacturing were limited to fenced options that were large, took up a lot of space on the...

Mariane Davids
By Mariane Davids - June 13, 2017

Robotic grinding, polishing, sanding, deburring and finishing applications growth

In the future, robotic grinding, polishing, sanding, deburring and finishing applications will be as big as robotic welding. Read more

Using 2 finger gripper attached to UR10 through ROS

Hello,We have a robot UR10 with a 2 finger gripper connected to the Robot controller through one of the USB port. We can manage to control the robot using the modern driver and ROS on another network...Read more

ROS Configuration for the C-Gripper

Hello,We have a problem with the communication with a robotiq gripper using ROS. I will explain the problem with more detail to check if you can help us.We have a robot UR10 with a C-model Gripper (2...Read more

How can I make a UR5 draw arcs and circles?

Hi!I want to make the UR5 make draw random lines, arcs and circles on a piece of paper. My approach for that so far was to generate the geometry in Processing (Java for creatives..) and send points...Read more