1152 HEIDENHAIN Technical Manual iTNC 530 HSCI
Error code:
Free rotation Free rotation means that the rotary axis rotates as often as required (with a
display range of 0 to 360°) without being affected by software limit switches.
You can define the free rotation function through words (axis 4 and 5) or with
Module 9223.
No uncontrolled axes can be used for this function, but PLC axes (auxiliary
axes) are possible along with main axes.
The maximum feed rate is 300 000 °/min or the limiting value in MP1010.x.
The feed rate is not shown in the status window. You can change the feed rate
with the override potentiometer (W754) continuously, for example by copying
W494 (active feed rate override) to W754. MP7620 bit 3 is accounted for.
Use Module 9048 to inquire whether free rotation is active for a specific axis.
The following conditions apply to the free rotation function:
Collision monitoring (DCM) does not work in combination with the "free
rotation" PLC function, since this special function for the defined "free" rotary
axis runs asynchronously to the system. For the work envelope this means
that all CMOs moved with the "free" rotary axis cannot be monitored by
DCM.
All monitoring functions, such as for position, following error, signal
amplitude of the encoder, etc., remain active.
All settings for the rotary axes via machine parameters, such as jerk,
acceleration, etc., remain valid.
The axis that is in free rotation behaves asynchronously to (independently
of) all other axes. For example, an NC program can be run while the "free
rotation" axis rotates independently. This axis is not considered when
calculating the path.
The axis for free rotation must be a rotary axis that can rotate over 360°
without any restrictions.
The free rotation function can be used not only for principal axes (NC axes),
but also for auxiliary axes (PLC axes).
Marker Value Meaning
M4203 0 No error
1 Invalid coordinate type, target address too large, or
given target address is not a double-word address
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