Actual velocity of synchronous axis technology block swing too much

Hello

             I read position value from incremental encoder (900 pulse per rev) via TM PosInput 2 (6ES7 551-1AB00-0AB0) and i track actual position and velocity in 2 cycle time of MC-Servo (10ms, 50ms), in 10ms graph of actual position more accuracy (4 degree different) but actual velocity swing too much ( 400-450 degree/s), in 50ms actual position less accuracy (20 degree different) but actual velocity more stable not swing too much. If i want actual position more accuracy and velocity not swing too much, any parameter should i config more ?