Figure 3. MPC’s oil filler cap inspection machine
During the “Teach Mode” procedure, the quality department selects a "good" part. The part is then presented to the inspection system, and the operator can press the "Teach" button, which creates a new part number. All the existing trained part numbers are retained.

“PPT Vision’s toolset allowed me to automate the teach process, and eliminate at least a half-hour of setup time per part,” said Brian Champion, engineering technician at MPC. “Given that we change products so often, this saves me a lot of time.”

MPC had a machine built around this inspection (Figure 3). The device feeds the part, does the quality checks mentioned, and sorts the components into acceptable and rejected parts. The required throughput is 2400 parts per hour. In order to achieve this rate, MPC designed a machine with two feeder bowls and a pair of “walking beam” conveyors.

Since the machine requires two lanes, with four cameras per lane to achieve the throughput required, two M40 processors are used, with a total of 8 of PPT’s M100, VGA resolution cameras. The left and right sides of the machines are mirrors of one another, so the same vision inspection program is running on both M40 processors. Cameras 1 and 2 are dedicated to the O-ring presence/absence application, and cameras 3 and 4 are dedicated to the quality check of the pad printing.

This article was written by Steve Maves, applications engineering manager, PPT Vision (Minneapolis, MN). For more information, Click Here.

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