10.11 Preassigned Q Parameters; Values From The Plc: Q100 To Q107; Active Tool Radius: Q108 - HEIDENHAIN TNC 640 User Manual

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10.11 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

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, Q114 and

Q115 - Q117 in the unit of measure used by the active program.

Danger of collision!

Q parameters are used in the HEIDENHAIN cycles, in machine

tool builder cycles, and in supplier functions. You can also

program Q parameters within the NC program. 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

Only use Q parameter ranges recommended by

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.

The control assigns values from the PLC to parameters Q100 to

Q107 in an NC program.

The active value of the tool radius is assigned to Q108. Q108 is

calculated from:

Tool radius R (tool table or G99 block)

Delta value DR from the tool table

Delta value DR from the T block

The control remembers the current tool radius even if

the power is interrupted.

Programming Q Parameters | Preassigned Q parameters

HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017