Ridge Center Preset (Cycle 409, Din/Iso: G409); Cycle Run - HEIDENHAIN TNC 640 User Manual

15
Touch Probe Cycles: Automatic Presetting | RIDGE CENTER PRESET (Cycle 409, DIN/ISO: G409)
15.3 RIDGE CENTER PRESET (Cycle 409, DIN/
ISO: G409)

Cycle run

Touch Probe Cycle 409 finds the center of a ridge and defines its
center as 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
(column F).
3 Then the touch probe moves at clearance height to the next
touch point 2 and 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
Q166
Q157
534
Meaning
Actual value of measured ridge width
Actual value of the centerline
HEIDENHAIN | User's manual for cycle programming | 10/2017