Siemens SINUMERIK 840D Function Manual

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17.4 Continuous manual traversing17.4.1 FunctionFor continuous manual traversing, the plus and minus traversing keys are selected to move therelevant axis in the appropriate direction. If both traversing keys are pressed simultaneously,there is no traversing movement, or, if an axis is in motion, it is stopped.NoteWhen the control is switched on, axes can be traversed to the limits of the machine becausethey have not yet been referenced. Hardware limit switches might be triggered as a result. Thesoftware limit switches and the working-area limitation are not operative.Continuous traversing in jog modeIn jog mode, the axis traverses as long as the traversing key is pressed. With the release of thetraversing key, the axis is decelerated to standstill. The movement is completed when theparameterized exact stop criterion of the axis is reached.If the axis reaches a traversing range limit before the traversing key is released (working arealimitation, software limit switch, etc.), the axis is stopped at the limit.Continuous traversing in continuous modeIn continuous mode, traversing of the axis is started by pressing the traversing key. Thetraversing movement is continued even after the traversing key is released.WARNINGRisk of collisionIn continuous mode, several axes can be started by pressing the respective traversing key.Any interlocks must be implemented by the user / machine manufacturer via the PLC userprogram.The traversing movement can be interrupted and continued by the operator at any time oraborted. If the axis reaches a traversing range limit before canceling the traversing movement(working area limitation, software limit switch, etc.), the axis is stopped at the limit.Interrupt traversing movementThe operator can interrupt traversing via the operator controls of the machine control panel(MCP) in the following ways:● Feedrate override = 0%● Feedrate stop● NC stop or NC stop axis/spindleIf the cause of the interruption is removed, the axis continues to traverse.H1: Manual traversing17.4 Continuous manual traversingAxes and spindlesFunction Manual, 06/2019, A5E47437747B AA 643