Electric-component mounting system

An electric-component mounting system for mounting electric components on a circuit substrate, comprising:

• a component supply device having a component-supply portion from which said electronic components are supplied one after another;
• a circuit-substrate support device that supports said circuit substrate;
• a component-holding head rotatable about an axis of rotation thereof and arranged to removably hold a suction nozzle having a sucking surface such that said suction nozzle extends in an axial direction of said component-holding head, said suction nozzle holding each one of said electric components supplied from said component-supply portion of said component supply device, and mounting said each one electric component on said circuit substrate supported by said circuit-substrate support device;
• a head rotating device operable to rotate said component-holding head;
• a relative-movement device operable to move at least one of said component-holding head and said component supply device relative to an other of said component-holding head and said component supply device, in a direction intersecting said axis of rotation of said component-holding head;
• an axial-movement device operable to move at least one of said component-holding head and said component supply device in said axial direction toward and away from an other of said component-holding head and said component supply device;
• an image-taking device operable to take an image of said sucking surface in said axial direction toward said sucking surface;
• and
• a control device operable to control said head rotating device, said relative-movement device, said axial-movement device and said image-taking device,
• and wherein said control device includes
• a relative-position obtaining portion operable to obtain a relative position between said sucking surface and said axis of rotation of said component-holding head;
• a relative-movement control portion operable to control said relative-movement device, for effecting a relative movement between said component-holding head and said component supply device on the basis of said relative position obtained by said relative-position obtaining portion, so as to minimize an error of relative positioning between said sucking surface and a predetermined sucking position of said each one electric component positioned at said component-supply portion of said component supply device;
• and
• a component-transfer control portion operable after said relative movement between said component-holding head and said component supply device by said relative-movement device, to control said axial-movement device to move said at least one of said component-holding head and said component supply device toward said other of said component-holding head and said component supply device, for transferring said each one electric component from said component-supply portion of said component supply device to said suction nozzle.