6 – 58 HEIDENHAIN Technical Manual TNC 426, TNC 430
Forked swivel head In this example, the mechanical offset of a forked swivel head is determined
with a dial indicator and a cylinder with a known diameter.
Temporary input values for the machine parameters:
n MP7500 = %xxxx101
n MP7510.0 = %000100 ; Shift in Z axis
n MP7510.1 = %000010 ; Shift in Y axis
n MP7510.2 = %001000 ; Free tilting axis A
n MP7510.3 = %000001 ; Shift in X axis
n MP7510.4 = %000010 ; Shift in Y axis
n MP7510.5 = %100000 ; Free tilting axis C
n MP7510.6 = %000000 ; End transformation
Y
Z
X
Z
Step 1a
Determining the Y offset:
n Position A = –90
n Set dial indicator to 0
0
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