Slot Center Preset (Cycle 408, Din/Iso: G408); Cycle Run - HEIDENHAIN TNC 640 User Manual

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Touch Probe Cycles: Automatic Presetting | SLOT CENTER PRESET (Cycle 408, DIN/ISO: G408)

15.2 SLOT CENTER PRESET (Cycle 408,

DIN/ISO: G408)

Touch Probe Cycle 408 finds the center of a slot and defines

its center as a preset. If desired, the TNC can also enter the

coordinates into a datum table or the preset table.

1 Following the positioning logic, the TNC positions the touch

probe at rapid traverse (value from FMAX column) (See

"Executing touch probe cycles", page 497) to touch point 1. The

TNC calculates the touch points from the data in the cycle and

the safety clearance from the SET_UP column of the touch

probe table.

2 Then the touch probe moves to the entered measuring height

and runs the first probing process at the probing feed rate

3 Then the touch probe moves either paraxially at measuring

height or at clearance height to the next starting point

probes the second touch point.

4 Finally the TNC returns the touch probe to the clearance height

and processes the determined preset depending on the cycle

parameters Q303 and Q305 (See "Characteristics common to

all touch probe cycles for presetting", page 528) and saves the

actual values in the Q parameters listed below.

5 If desired, the TNC subsequently measures the preset in the

touch probe axis in a separate probing.

Parameter number

Actual value of measured slot width

Actual value of the centerline

HEIDENHAIN | User's manual for cycle programming | 10/2017