Siemens SINUMERIK 840D sl Function Manual

Also see for SINUMERIK 828D Turning: Diagnostic manual Function manual Equipment manual Programming manual Operating manual

FunctionThe BRISKA part-program command is used to select the "without jerk limitation" accelerationprofile for single-axis movements (JOG, JOG/INC, positioning axis, reciprocating axis, etc.).G group: -Effectiveness: ModalAxis:● Value range: Axis name of the channel axesAxis-specific initial settingAcceleration without jerk limitation can be set as the axis-specific initial setting for single-axismovements:MD32420 $MA_JOG_AND_POS_JERK_ENABLE = FALSEReset behaviorThe axis-specific initial setting is activated via a reset:MD32420 $MA_JOG_AND_POS_ENABLE5.2.2 Constant travel time (channel-specific)5.2.2.1 General InformationOverviewIn the case of acceleration without jerk limitation, sudden acceleration of 2 * amax occurs onswitchover between acceleration and braking. In order to avoid this sudden acceleration, achannel-specific constant travel time can be programmed. The constant travel time definesthe time taken to traverse between the acceleration and braking phases at constant velocity:MD20500 $MC_CONST_VELO_MIN_TIME (minimum time with constant velocity)NoteThe constant travel time is ineffective:● Active function: Look Ahead● In traversing blocks with a travel time that is less or equal to the interpolation cycle time.B2: Acceleration5.2 FunctionsBasic Functions248 Function Manual, 01/2015, 6FC5397-0BP40-5BA2