Synchronization controller having function of solving shock generated in synchronization start block

A synchronization controller configured to start to move a slave axis when a master axis passes a certain position and then move by a predetermined distance while the master axis moves from the position by a predetermined distance, the synchronization controller comprising:

• a synchronization operation instruction unit configured to set:
• a master axis movement amount,
• a slave axis movement amount, and
• a position of the master axis at which the slave axis starts to be synchronized at a synchronization ratio set based on the slave axis movement amount and the master axis movement amount;
• a synchronization magnification changing instruction unit configured to set the slave axis movement amount immediately before the synchronization from the start of changing of a speed ratio of the slave axis for synchronization with the master axis with a preset synchronization ratio to the end of changing of the speed ratio;
• a synchronization parameter calculation unit configured to calculate a synchronization magnification at a time when changing of the synchronization magnification is completed, a master axis movement amount at a time when the synchronization magnification is changed, from the start of changing of a speed ratio of the slave axis for synchronization with the master axis with a preset synchronization ratio to the end of changing of the speed ratio, and a master axis movement amount from the current position of the master axis to a start of changing of the synchronization magnification, based on the slave axis movement amount, the master axis movement amount, and a position of the master axis at which the slave axis starts to be synchronized, which are set by the synchronization operation instruction unit, as well as the slave axis movement amount set by the synchronization magnification changing instruction unit;
• a position calculation unit configured to calculate an inclination of the synchronization magnification which is graphically expressed as a linear function with respect to the position of the master axis and a position of the master axis at which the slave axis in a stop state starts to be operated, based on a calculation result of the synchronization parameter calculation unit to attain the synchronization magnification at a time when changing of the synchronization magnification is completed, calculated by the synchronization parameter calculation unit, at a time point when the slave axis completes moving by the movement amount set by the synchronization magnification changing instruction unit, or at the position of the master axis at which the slave axis starts to be synchronized set by the synchronization operation instruction unit;
• and
• a slave axis movement amount output unit configured to output an instruction to the slave axis by gradually changing, from a position of the master axis at which a synchronization magnification changing operation is started, the inclination of the synchronization magnification with respect to a master axis speed.