[Cause]
The acceleration/deceleration times of gun Ａ and gun Ｂ differ. During synchronized motion to the pressure application position, the acceleration/deceleration times of gun Ａ and gun Ｂ must be equal.
[Countermeasure]
Set the time constants of both guns using the gun tuning utility. Open the gun tuning utility screen. Press F6[Dual gun]. Press F5[Time constant] and select Yes in the displayed prompt to make the time constants of both guns equal. Turn the controller power off and back on.