Patent ID: 6853874

Claim:
A method of changing a width of a variable-width substrate conveyor including (a) a pair of guide rails, (a) a feeding device for feeding a circuit substrate along the guide rails, (b) a pair of guide rails having respective guiding surfaces for guiding opposite side faces of the circuit substrate being fed by the feeding device, in a longitudinal direction of said pair of guide rails, and (c) a width changing device for moving said pair of guide rails relative to each other toward or away from each other, to change a distance between the pair of guide rails, for thereby changing the width of the variable-width substrate conveyor, said method comprising: an image-taking step of operating an image-taking device to take an image of a portion of at least one of said pair of guide rails; and a controlling step of controlling said width changing device on the basis of the image taken by said image-taking device.