Path length divided by feed gives ideal cutting-move time. A cycle also contains rapid moves, axis acceleration, tool changes and auxiliary actions.
Ideal cutting-move time
Cutting time
t = L / vfFor 1250 mm of path at an average 850 mm/min, ideal time is 1.47 minutes, about 88 seconds. Calculate groups with different feed rates separately and add them.
What to add for a complete cycle
- rapid and safe Z moves,
- tool change and tool measurement,
- spindle acceleration, coolant and orientation,
- technology dwell and probing cycles,
- loading and operator actions when estimating takt time.
Why L divided by F can be optimistic
A machine does not reach commanded feed instantly. Short segments, frequent direction changes and acceleration limits reduce average feed. A kinematics-aware simulation or measurement on the actual machine is the best final source.
From cycle time to part cost
Cost estimation also needs setup time, required good parts, expected scrap, machine and labour rates, tooling and material. Keep cycle-dependent cost separate from the one-time batch setup.