HEIDENHAIN iTNC 530 (340 49x-05) Cycle programming - Manual (Page 161)

HEIDENHAIN iTNC 530 161
5.7 CIR
C
ULAR S
T
UD (Cy
c
le 257
, DIN/ISO: G257)
Please note while programming:
Pre-position the tool in the machining plane to the starting
position (stud center) with radius compensation R0.
The TNC automatically pre-positions the tool in the tool
axis. Note Parameter Q204 (2nd setup clearance).
The algebraic sign for the cycle parameter DEPTH
determines the working direction. If you program
DEPTH = 0, the cycle will not be executed.
At the end of the cycle, the TNC returns the tool to the
starting position.
At the end, the TNC positions the tool back to the setup
clearance, or to the 2nd setup clearance if one was
programmed.
Danger of collision!
Enter in MP7441 bit 2 whether the TNC should output an
error message (bit 2=1) or not (bit 2=0) if a positive depth
is entered.
Keep in mind that the TNC reverses the calculation for pre-
positioning when a positive depth is entered. This
means that the tool moves at rapid traverse in the tool axis
to setup clearance below the workpiece surface!
Leave enough room next to the stud for the approach
motion. Minimum: tool diameter + 2 mm