HEIDENHAIN 548431-05 User Manual page 251

Teach-in | Turning cycles
Roughing (hollowing) with the plunge cycle
The tool to be used cannot plunge at the required angle of 15°. The
roughing process for the area therefore requires two steps.
1st step
The shaded area from AP (Start point contour) to EP (End point
contour) is rough-machined with the Plunge longit. E cycle, taking
oversizes into account.
The Start. angle A is defined with 15°, as specified in the
workpiece drawing. From the tool parameters, the control
calculates the maximum plunge angle that can be achieved with
the programmed tool. The remaining material will be reworked in
the second step.
The expanded mode is used to machine the rounding arcs in the
contour valley.
Be sure to enter the correct values for the Start point contour X1,
Z1 and End point contour X2, Z2 parameters. These parameters
determine the cutting and infeed directions—in this example,
external machining and infeed in negative X-axis direction.
Tool data:
Turning tool (for external machining)
TO = 1 – Tool orientation
A = 93° – Tool angle
B = 55° – Point angle
HEIDENHAIN | MANUALplus 620 | User's Manual | 12/2017
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