Contour Handwheel - Siemens SINUMERIK 808D Function Manual

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Contour handwheel

Function
When the function is activated, the feedrate of path and synchronized axes can be controlled via a handwheel in "AUTO"
and "MDA" modes.
Availability
For the SINUMERIK 808D/SINUMERIK 808D ADVANCED, the contour handwheel function is available as an option that is
under license.
Input mode (path or velocity input)
Either the distance or the velocity can be entered via the handwheel:
● Path definition
Limiting the velocity to the maximum permissible value causes the axes to overtravel. The path defined by the
handwheel is traversed and no pulses are lost.
● Velocity specification
The handwheel only defines the traverse velocity. As soon as the handwheel stops, the axes stop too. Motion is braked
immediately if no pulses are supplied from the handwheel in one IPO cycle, thus preventing overtravel by the axes. The
handwheel pulses do not supply a path default.
The input mode is set with machine data: MD11346 $MN_HANDWH_TRUE_DISTANCE (handwheel path or velocity input).
For more information about this machine data, see SINUMERIK 808D ADVANCED Parameter Manual.
Feedrate
The feedrate in mm/min is dependent on the following:
● The number of pulses supplied by the selected handwheel within one period
● Pulse evaluation of the handwheel via the machine data: MD11322 $MN_CONTOURHANDWH_IMP_PER_LATCH
(contour handwheel pulses per detent position)
● The activated increment (INC1, 10, 100, etc.)
● The distance weighting of an increment of the first available geometry axis: MD31090 $MA_JOG_INCR_WEIGHT
(evaluation of an increment for INC/handwheel)
The feedrate is not dependent on the following:
● The programmed feedrate mode (mm/min, mm/rev.)
● The programmed feedrate (resultant velocity can be higher)
● The rapid traverse velocity for G0 blocks
● The override (position 0% is effective, i.e. zero speed)
Traversing direction
The traversing direction depends on the direction of rotation:
● Clockwise
– Results in travel in the programmed direction
If the block-change criterion (IPO end) is reached, the program advances to the next block (response identical to G60).
● Counterclockwise
– Results in travel opposite to the programmed direction
Here, the axes can only traverse to the appropriate block start. Pulses are not collected if the handwheel continues to
rotate.
Activation of the function
The function can be activated via the NC program or via interface signals.
Function Manual
01/2017
183