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Automated O-Ring Assembly Machine with FANUC LR Mate 200iC Robot - Courtesy of Compass Automation


This video features an automated system designed to assemble o-ring assemblies, developed by FANUC Authorized Integrator Compass Automation. The system features the FANUC LR Mate 200iC, a robot that is ideal for small part assembly applications. The product consists of a rounded pin inserted into a cylindrical socket, where the pin is retained with a rubber o-ring. Individual components are fed into the system via vibratory feeder bowls. 

First, a socket is introduced into the system. A through-beam sensor verifies that a part is in position, signaling a pneumatic actuator to present the part. A 2-axis pick and place picks the part from the escapement and places it onto a 6-position dial table. 

In the next station, an o-ring is introduced into the system. Again, a through-beam sensor verifies that a part is in position, and signals a pneumatic escapement to present the part. A mandrel, mounted on a 2-axis slide system, is used to pick the o-ring. The mandrel advances into the escapement, collapsing inside the ID of the o-ring. As the mandrel retracts, it expands, pulling out an o-ring. The mandrel and o-ring advance horizontally. Simultaneously, a funnel mechanism advances towards an empty socket, forming a tight seal that guides the o-ring during assembly. The mandrel advances into the socket, collapsing into the funnel, and forcing the o-ring into the socket. The detent on the ID of the socket holds the o-ring while the mandrel and funnel retract.

In the final assembly step, the FANUC LR Mate 200iC Robot picks a rounded pin from an escapement. Here, the escapement functions the same as the socket and o-ring escapements. A through-beam sensor verifies that a part is in position, and a pneumatic escapement presents the part. The robot performs a simple six-axis motion to insert the pin into the o-ring/socket sub-assembly. 

The LR Mate then lifts the assembled product off the dial table, and passes the socket through a through-beam sensor, to ensure that the assembly was successful. The robot drops the finished product into an out-feed chute for post-processing and packaging. This machine processes one part every 7 seconds. This Compass Automation system made it possible for the end user to meet the standards set by their customer for complete assembly of the part at the required production rate.

Interested in this O-Ring Assembly System? Follow the link to request a robot quote, or follow the link to learn more about our full line of innovative Assembly Robots.


Key Technology Demonstrated


FANUC LR Mate 200iC Robot

O-Ring Assembly Machine
  • Offers maximum performance in a light, efficient, accurate and nimble (LEAN) package
  • Meets the automation needs of a variety of industries including electronics, medical devices, food, metals, plastics, and packaged and consumer goods
  • Its compact design and flexibility to quickly adapt to small lot sizes, new styles and other modifications provides manufacturers an affordable solution for small part, flexible production
  • The six-axis, LR Mate 200iC robot rates ‘best in class’ for its wrist load capacity, repeatability, work envelope, and speed
  • Multiple mounting options: floor, tabletop, inside machines, angle and invert, which maximizes flexibility for small and narrow workspaces
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