Continuous Manual Traversing; Function - Siemens SINUMERIK 840D Function Manual

17.4

Continuous manual traversing

17.4.1

Function

For continuous manual traversing, the plus and minus traversing keys are selected to move the
relevant 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.
Note
When the control is switched on, axes can be traversed to the limits of the machine because
they have not yet been referenced. Hardware limit switches might be triggered as a result. The
software limit switches and the working-area limitation are not operative.
Continuous traversing in jog mode
In jog mode, the axis traverses as long as the traversing key is pressed. With the release of the
traversing key, the axis is decelerated to standstill. The movement is completed when the
parameterized exact stop criterion of the axis is reached.
If the axis reaches a traversing range limit before the traversing key is released (working area
limitation, software limit switch, etc.), the axis is stopped at the limit.
Continuous traversing in continuous mode
In continuous mode, traversing of the axis is started by pressing the traversing key. The
traversing movement is continued even after the traversing key is released.
Risk of collision
In 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 user
program.
The traversing movement can be interrupted and continued by the operator at any time or
aborted. 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 movement
The 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/spindle
If the cause of the interruption is removed, the axis continues to traverse.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
WARNING
H1: Manual traversing
17.4 Continuous manual traversing
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