HEIDENHAIN MANUALplus 4110 Pilot - Manual (Page 70)

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Recessing cycle
Simple axial cutting cycle G865
Simple radial cutting cycle G866
G865/G866 recesses the rectangle described by the tool position and
base corner “X, Z“.
Tool position at end of cycle: cycle starting point.
Parameters
X, Z:
Target point (X as diameter)
P: Cutting width
I, K: Oversizes – default: 0
Q: Roughing/finishing
• Q=0: Roughing only
• Q=1: Roughing and finishing
E: Finishing feed rate/dwell time
• for Q=0: Dwell time (for chip breaking) – default: length of time
for two revolutions
• for Q=1: finishing feed rate – default: active feed rate
• Calculating the proportioning of cuts
• “Cutting width P“ is defined: infeeds † P
• “Cutting width P“ is not defined: infeeds † 0.8 * cutting
width of the tool
• Cutter radius compensation: is carried out
• Oversizes: G57/G58 oversizes are taken into consideration
if I and K are not given in the cycle. The oversizes are deleted
upon cycle completion.