Weld-Action Co., Inc. - Item # Collision Detection

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All Categories > Monitoring Systems > Collision Detection > Item # Collision Detection  
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Item # Collision Detection




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Collision Detection

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Superior protection for your equipment and parts
Collision Detection is a highly advanced robot control option that automatically detects collisions and quickly causes the robot to stop and back up to release the pressure. It not only reduces the force of the collision, but also prevents the robot and its tooling from being pressed against an object after a collision.

This built-in function is proven superior to mechanical collision detection devices in several important ways: When this feature is enabled, it detects collisions in all directions, protecting not only the end of arm tooling, but also the parts, fixtures, peripheral equipment and the robot itself. It has no mechanical parts and requires no cabling, which gives it higher reliability and more cost efficiency. Also, since there is no device attached to the tool, you do not extend your tool offset distance, which allows greater maximum tool weight and better reorientation performance. ABB's Collision Detection is active both in teach and automatic modes, so you are protected at all times. After a collision, the robot can be immediately jogged or its program restarted. Best of all, since Collision Detection works together 'with the Load Identification functions, you do not have to perform complicated load calibration tasks to ensure its proper operation.




Implemented for Robot · Benefits · Range of Applications · Prevent Damage With Software

Implemented for Robot
  • IRB140
  • IRB 1400
  • IRB 2400
  • IRB 4400
  • IRB 6400
  • IRB 6600
  • IRB 7600



Benefits
  • Detection in all directions
    Abnormal torque levels on any robot axis, induced by front collisions, or external forces exerted on any part of the mechanical arm, are detected and will cause the robot to stop quickly and then back off to relieve forces between the robot and environment. The robot can immediately be jogged or restarted.
  • Cost efficient and highly reliable solution
    A software solution detects and reduces the force of collisions without the need for a mechanical clutch. It adds no weight, has no moving parts and requires no extra cabling. This means reduced costs and improved performance.
  • Less damage on equipment
    With collision detection, the robot quickly reacts to a collision and reduces the force of the collision. The robot backs away along the program path to relieve the force on the equipment and prevents or reduces costly damage.



Range of Applications
Collision Detection is extremely useful in all applications and in many different situations. Some examples are:
  • When running programs for the first time and not sure of all paths.
  • When the arc weld process ends (at the end of the weld seam), it often happens that the wire gets stuck (burned) to the work piece. Collision Detection will stop the robot before it continues its movement thus securing that the equipment does not get damaged.
  • In a collision caused when the robot is being maneuvered manually.
  • When a gripper is closed by mistake - e.g. due to electrical problems or programming errors.
  • In a common situation where clamps are used to hold the part in position in the fixture (especially in arc welding applications), if the clamps are not closed, e.g. due to human error. Collision Detection will prevent hard crashes with the clamps.
  • In applications where there are other moving objects within the working range (pallets that are stacked, moving conveyors, etc).
  • When jogging large parts and the operator cannot see the tooling on the far side. For example, if an operator is trying to teach a path for placing a car body side or a frame into a clamping station, he might not see that he is pressing the part against one of the clamps. With Collision Detection, the robot senses the abnormal force and stops - preventing costly damage to the cell.
  • Weld gun tip sticking. Weld tip sticking is a common problem that can result in bending of the gun electrodes or damage to the cell equipment as the robot moves to its next point. With Collision Detection, the robot stops where it is stuck, allowing the operator to simply jog the robot and replace the damaged tip, preventing hours of downtime for gun or other part replacement.
  • Machine Tending. Common problems in machine tending are parts being stuck, doors not opening all the way, part misalignment, etc. Each of these situations can cause damage to the robot gripper. With Collision Detection, the robot can minimize the damage, saving downtime and possible repair costs.




Prevent Damage With Software
The robot motion can be stopped if defined commanded motion torque values are exceeded. The routine replaces mechanical clutches often used to protect your equipment and parts.
Tuning is normally not required, but the sensitivity can be changed from RAPID, ABB's own programming language, or CFG. The supervision can even be switched off completely or get back in run-time. This may be necessary when strong process forces are acting on the robot.
The sensitivity during default tuning is comparable to the mechanical alternative and in most cases much better. In addition together with the Load Identification function, it has the advantages of:
  • no extended tool center point and additional weight
  • no connection to external e-stop circuit
  • no wear
  • the automatic backing off after collision
  • adjustable tuning
Two system outputs reflect the activation and the trig status of the function.



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· Load Identification


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Weld-Action Company Inc.    2100 N. River Rd.    Warren, OH 44483 
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