HEIDENHAIN TNC 620 Programming Station

Programming Qparameters | Preassigned Q parameters
9
9.11 Preassigned Q parameters
The Q parameters Q100 to Q199 are assigned values by the control.
The following types of information are assigned to the Q parameters:
Values from the PLC
Tool and spindle data
Data on operating status
Results of measurements from touch probe cycles etc.
The control saves the preassigned Q parameters Q108 and Q114 to
Q117 in the unit of measure used by the active NC program.
NOTICE
Danger of collision!
HEIDENHAIN cycles, manufacturer cycles and third-party
functions use Q parameters. You can also program Q parameters
within NC programs. If, when using Q parameters, the
recommended Q parameter ranges are not used exclusively, then
this can lead to overlapping (reciprocal effects) and thus cause
undesired behavior. Danger of collision during machining!
Only use Q parameter ranges recommended by HEIDENHAIN.
Comply with the documentation from HEIDENHAIN, the
machine tool builder, and suppliers.
Check the machining sequence using a graphic simulation
You must not use preassigned Q parameters (QS
parameters) between Q100 and Q199 (QS100 and
QS199) as calculation parameters in the NC programs.
Values from the PLC: Q100 to Q107
The control assigns values from the PLC to parameters Q100 to
Q107 in an NC program.
Active tool radius: Q108
The active value of the tool radius is assigned to Q108. Q108 is
calculated from:
Tool radius R from the tool table
Delta value DR from the tool table
Delta value DR from the NC program (compensation table or tool
call)
Further information: "Delta values for lengths and radii", Page 126
The control remembers the current tool radius even if the
power is interrupted.
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HEIDENHAIN | TNC620 | Klartext Programming User's Manual | 01/2022