Patent ID: 7159305

Claim:
An electronic component mounting apparatus comprising: a component feeding unit feeding an electronic component; a beam moving in a first direction along a first drive axis and a second drive axis; a first driven portion moving the beam along the first drive axis; a second driven portion moving the beam along the second drive axis; a mounting head that moves along the beam for picking the electronic component up from the component feeding unit and mounting the electronic component on a printed board; a memory storing data on a picking up position of the electronic component and data on a mounting position of the electronic component on the printed board; a controller sending a command to move the beam to a position for the picking up and the mounting of the electronic component, the command being generated based on the data stored in the memory; a first driver circuit providing a first control electric current to the first driven portion in response to the command from the controller; and a second driver circuit providing a second control electric current to the second driven portion in response to the command from the controller, wherein the first driver circuit is configured to calculate a difference between positions of the first and second driven portions along the first direction and to adjust the first control electric current based on the difference so as to increase a driving power of the first driven portion when the first driven portion is behind the second driven portion along the first direction and to reduce the driving power when the first driven portion is ahead of the second driven portion along the first direction.