Contour Handwheel/Path Input Using Handwheel (Option) - Siemens SINUMERIK 840D Function Manual

H1: Manual traversing
17.13 Use of handwheels in automatic mode
DRF active
When "Handwheel override in automatic mode" is activated, it is important to check whether the
"DRF" function is active (DB21, ... DBX0.3 = 1).
If this were the case, the handwheel pulses would also cause a DRF offset of the axis. The user
must, therefore, first deactivate DRF.
Feedrate override
The feedrate override does not affect the velocity of the movements produced by the
handwheel (exception: 0%). It only affects the programmed feedrate.
With path default and fast handwheel movements, the axis may not be able to follow the
handwheel rotation synchronously (especially in the case of a large handwheel-pulse
weighting), causing the axis to overtravel.
17.13.2

Contour handwheel/path input using handwheel (option)

"Contour handwheel" function
When the function is activated, the path and synchronized axes can be controlled via a
handwheel in AUTOMATIC and MDI modes.
Requirements
It is not permissible that fixed feedrate, dry run feedrate, thread cutting, or tapping are selected.
Availability
The "Contour handwheel" function is available as an option requiring a license.
Input mode (path or velocity input)
Either the distance or the velocity can be entered via the handwheel:
● Path definition
The traversing velocity obtained as a result of the path defined by the handwheel pulses
each IPO clock cycle, is limited by the control system to the maximum permissible velocity.
The handwheel pulses that are not immediately executed are collected, and traversed
through at a later point in time. As a consequence, it is possible that the axes continue to
run. No pulses are lost.
● Velocity specification
Based on the handwheel pulses for each IPO clock cycle, the velocity is specified at which
the axes will be traversed. Traversing motion is immediately stopped as soon as no pulses
are received from the handwheel in an IPO clock cycle. The axes do not continue to run .
The input mode is set with machine data:
MD11346 $MN_HANDWH_TRUE_DISTANCE
710
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA