Machines With Hirth-Coupled Axes - HEIDENHAIN TNC 640 User Manual

Touch Probe Cycles: Automatic Kinematics Measurement | MEASURE KINEMATICS (Cycle 451, DIN/ISO:
G451, option)

Machines with Hirth-coupled axes

Danger of collision!
In order to be positioned, the axis must move out of the Hirth
coupling. If necessary, the TNC rounds the calculated measuring
positions so that they fit into the Hirth grid (depending on the
start angle, end angle and number of measuring points).
So remember to leave a large enough safety clearance to
prevent any risk of collision between the touch probe and
calibration sphere
Also ensure that there is enough space to reach the safety
clearance (software limit switch)
Danger of collision!
Depending on the machine configuration, the TNC cannot
position the rotary axes automatically. If this is the case, you
need a special M function from the machine tool builder enabling
the TNC to move the rotary axes. The machine tool builder
must have entered the number of the M function in machine
parameter mStrobeRotAxPos (No. 244803) for this purpose.
Note the documentation of the machine tool builder
Define a retraction height Q408 greater than 0 if software option 2
(M128, FUNCTION TCPM) is not available.
The measuring positions are calculated from the start angle, end
angle and number of measurements for the respective axis and
from the Hirth grid.
Example calculation of measuring positions for an A axis:
Start angle Q411 = –30
End angle Q412 = +90
Number of measuring points Q414 = 4
Hirth grid = 3°
Calculated stepping angle = (Q412 – Q411) / (Q414 – 1)
Calculated stepping angle = (90° - (-30°)) / (4 – 1) = 120 / 3 = 40°
Measuring position 1 = Q411 + 0 * stepping angle = -30° --> -30°
Measuring position 2 = Q411 + 1 * stepping angle = +10° --> 9°
Measuring position 3 = Q411 + 2 * stepping angle = +50° --> 51°
Measuring position 4 = Q411 + 3 * stepping angle = +90° --> 90°
HEIDENHAIN | User's manual for cycle programming | 10/2017
NOTICE
NOTICE
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