Application Description
This application provides a low cost solution to position a servo controlled adhesive application system. Only one camera is used, with it’s FOV covering the top left corner of the substrate material. During the inspection process, an image of the registration mark is taken and inspected. The registration mark is inspected using two edge find tools. These tools are looking for the two edges of the registration mark using a series of 10 line segments each. An algorithm then fits a set of lines through the returned point list from each edge find tool and calculates the intersection point. The coordinates of this intersection point are then transformed into the servo controllers coordinate frame and passed to the PLC using Ethernet/IP. An LED strobe light that can have the color wave length adjusted was used to overcome problems with background material and the varying substrate material colors from one part to the other.
Application Highlights
- Determines the X, Y, θ coordinates of a registration mark
- Multiple points are taken along each of the edges to generate two fitted lines so an intersecting point can be calculated using special algorithms
- Angle accuracy up to +/- 0.05 degrees
- An LED strobe light with adjustable wave length to accommodate color variation of the substrate
- Inspection results are transferred to PLC through Ethernet/IP