July 2013 8.1 Display and operation 1241
8.1.13 Cycles
HEIDENHAIN contouring controls feature standard fixed cycles (e.g. peck
drilling, tapping, pocket milling), which can be called in the NC program. In
addition to the standard HEIDENHAIN cycles, you can program Original
Equipment Manufacturer (OEM) cycles (see the Cycle Design User's Manual).
You can influence the function of many HEIDENHAIN standard cycles through
machine parameters.
For more information on the tapping cycle and the oriented spindle stop cycle,
see page 944.
See page 1535 for more information on the touch probe cycles.
Pocket milling Cycles 4 and 5:
In MP7430, enter the overlap factor for roughing out a rectangular or circular
pocket.
Infeed = (MP7430) · cutter radius
MP7430 is only effective for Cycles 4 and 5.
MP7430 Overlap factor for pocket milling
Input: 0.001 to 1.414
Cycles for milling
pockets with
combined contours
Cycles 6, 14, 15, 16:
With MP7420, specify:
• Bit 0: The milling direction for channel milling
• Bit 1: The sequence for rough-out and channel milling
• Bit 2: The conditions under which programmed pockets should be merged
(see graphics below)
• Bit 3: Whether each process (channel milling or pocket clearing) is to be
completed for all pecking depths before performing the other process, or
whether both are to be performed alternately for each pecking depth
• Bit 4: Position after completion of the cycle
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