Component placement positions are shifted in various directions over the entire board(coordinates are shifted in the different way depending on a board).

• 1,Any BOC mark is not used. in this case, the component placement precision tends to vary depending on a board.

               Use a BOC mark. if there is no BOC mark on the board, execute the template matching function.

• 2,A BOC mark is stained. In this case, coordinates of a component placement position tend to vary depending on a board also

              Clean the BOC mark. Maintain BOC marks so that they cannot be stained.

• 3,Data entry error in the"PWB thickness" field on the "PWB" data screen, in this case, a board is loosened in the up and down directions, and it moves in the X, Y or Z directions during PWB production. The machine drops off a component to be placed while the Z-axis is moving down.

            Check and/or modify the values in the"PWB height" and / or "PWB thickness" field(s).  

• 4,The backup pin is not installed properly. For a thin board or large board, a component placement error may occur more frequently.

             Reinstall the backup pin. install it especially under a component that requires the high placement precision.

• 5,The clearance between the reference pin and the positioning hole of a board is wide, and a board moves due to vibration degerated during PWB production.

            Use the reference pin appropriate for the positioning hole of a board. change the setting of the "position method" field to "shape reference".

• 6,Since the support table moves down quickly, a component that has been placed on a board is moved when the machine releases the clamped board.

           Set the "down acceleration" to "middle" or "low" on the "PWB conveyor" menu invoked from the "setting Group" menu of "machine setup" screen.

• 7,The faltness of the board top side is not enough

            Decide whether the board is used or not. if the backup pin position is adjusted, the flatness may be improved.

• 8,A filter or air tube of the head section is clogged. In this case, a component is picked up with remaining vacuum presuure when the vacuum conditon is cancelled during placement of the component.

             Execute the "vacuum calibration" command on the "set-up group" menu invoked from the " self calibration" menu. If the condition is not improved even after executing this command, replace the filter or air                    tube of the head section with a new one.