H1: Manual and handwheel travel
3.5 Handwheel override in automatic mode
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
177
3.5.3 Special features of handwheel override in automatic mode
Velocity display
The velocity display for handwheel override shows the following values:
● Set velocity
= programmed velocity
● Actual velocity
= resultant velocity including handwheel override
Effect on transverse axes
If the axis is defined as a transverse axis and DIAMON is active, the handwheel pulses are
interpreted and traversed as diameter values while handwheel override is active.
Dry-run feedrate
With active dry run
DB21, ... DBX0.6 (activate dry-run feedrate) = 1,
the dry-run feedrate is always effective
SD42100 $SC_DRY_RUN_FEED.
In this way, the axis is traversed to the programmed target position at dry-run feedrate
without any influence from the handwheel despite the active handwheel override with path
default (
FDA[AXi] = 0), i.e., the path default is ineffective.
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.
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