Are the Cobots are known for?
The co-robots are robots, proposed to physically interact with humans that are designed to operate autonomously with limited guidance. The first robot was invented in 1996 by J. Edward Colgate and Michael Peshkin which assured the safety of the humans by having no internal motor. By the time, packaging applications have inserted largely by the expertise which boosts the creativity and intelligence of Cobots. Right now, they are in use for lightweight processes to heavy-duty applications.
Incredible applications of co-robots
An expertise of the robotic industry has said that Collaborative Robot is a verb, not a noun. The collaboration is dependent on what the robot is doing, not the robot itself. The Cobots have a huge list of applications that are impossible to roll-out all of them but some brilliant functions are described below which may attract you.
- There is a popular myth that co-bots will replace humans in production work but the actual truth is that just like an instrument is meant to help the worker, co-bots are intended to help, assist but not replace the production work.
- In comparison with other robots, the Cobots are comparatively lightweight and can be easily moved to different places to do numerous tasks.
- Having a concern about safety, cobots are designated completely safe, either by limiting the force which reduces the chance of injury or by modifying the sensors which prevent touching or by a combination of both.
- Also, as compared to traditional robots, collaborative robots are relatively much simpler. This advantage serves in making them cheaper to buy and maintain.
- One of the best things about co-bots is that they do not require any special skill to program or use. Even, most of the co-bots are so simple that anyone who knows how to use a Smartphone, tablet or a computer can program them and teach them.
Different types of Cobots on the basis of safety concerns
- Hand Guiding: Most of the co-bots are designed and intended to work side by side, hand in hand with the human being with no guarding at all. Examples can be that of ABB’s YUMi, URS robotic arms from Universal Robots and Rethink Robotics Baxter. But this doesn't mean that there shouldn't be a guarding policy and minimum safety requirements.
- Safety inherent: There are two basic approaches taken up by the large robotics companies like Universal and Rethink to making Cobots safe to function in every environment.
- Safety-rated monitored stop: In this category, those Cobots are included who have the sensor that stops them when a human enters its workspace so that the worker feels no more than a gentle nudge. Either the human or the robot can move at the one time. The terminals of the robot or the moving parts are rounded because rounded surfaces help make that nudge even gentler. But the main disadvantage of this approach is that it limits the maximum load that the robot can handle as well as the speed of co-bots. Basically, a robot moving a 20kg part at high speed is going to hurt no matter how quickly it can stop upon making contact.
- Speed and sensor detect: To fight this disadvantage, the second approach is sensor-based; this approach allows safe use of co-bots in faster and heavier applications. Traditionally, physical barriers have been used to stop the robot when a person enters the perimeter. Examples are cages or light curtains. But modern sensors can be more advanced and technically efficient, sensing not only the presence of a person but their location as well. This allows the robot to slow down, work around someone or stop as the circumstances demand to maintain safety. When the person moves away, the robot can mechanically resume normal operation.
- Power and force limiting: This category includes today’s typical cobot which stops almost instantly when an obstacle encounters in their work by limiting speed, payload, and force. It keeps the energy of any collision below the ISO- defined maximum levels and ensures the safety of a worker.
Types of Cobots on the basis of Sensors
- Joint sensing: This type includes universal robots like UR3, UR5, UR10 and KUKA(IIWA) which uses its joints to supervise forces to the robot’s body.
- Force sensor base: As the name suggests, this type includes Cobots that have the force sensor at their base to monitor the different forces. The well known Fanuc (Cr-35iA) and Comau (AURA) are examples of Cobots that use this technique.
- Skin sensing: These are not widespread in the industry but may be the safest one. It includes BOSCH(APAS) cobot in which the sensor examine the conductivity of the robot’s body, and instructs the robot to stop when it reaches its threshold level.
Cobots pricing: How much Cobots Cost
According to the price and design, there are many cobots available in the market these days. Some are cheap because of the simplicity and others are high-priced because of their complexity. So if you are interested to buy it, then chose it according to your requirements and the budget.
In just the past 10 to 15 years, robots have come a long way. There was a time when robots used to be expensive, complicated machines. They were not in the reach of common man and were bit scary to work with them. Now the times have changed, robots are becoming very common and can be seen working side by side in most mega-industries or projects, taking care of the precarious work that nobody enjoys doing. At last, we can say that the cobots are designed to make our lives better and perform the audacious jobs which are very risky from the human’s point of view.