Please note while programming – HEIDENHAIN TNC 620 (34056x-04) Cycle programming User Manual
Page 228
Fixed Cycles: Multipass Milling
10.3
RULED SURFACE (Cycle 231, DIN/ISO: G231, software option 19)
10
228
TNC 620 | User's Manual Cycle Programming | 5/2013
Cutting motion
The starting point, and therefore the milling direction, is selectable
because the TNC always moves from point
1
to point
2
and in the
total movement from point
1
/
2
to point
3
/
4
. You can program
point
1
at any corner of the surface to be machined.
If you are using an end mill for the machining operation, you can
optimize the surface finish in the following ways:
A shaping cut (spindle axis coordinate of point
1
greater than
spindle-axis coordinate of point
2
) for slightly inclined surfaces.
A drawing cut (spindle axis coordinate of point
1
smaller than
spindle-axis coordinate of point
2
) for steep surfaces.
When milling twisted surfaces, program the main cutting
direction (from point
1
to point
2
) parallel to the direction of the
steeper inclination.
If you are using a spherical cutter for the machining operation, you
can optimize the surface finish in the following way:
When milling twisted surfaces, program the main cutting
direction (from point
1
to point
2
) perpendicular to the direction
of the steepest inclination.
Please note while programming:
From the current position, the TNC positions the
tool in a linear 3-D movement to the starting point
1
.
Pre-position the tool in such a way that no collision
between tool and fixtures can occur.
The TNC moves the tool with radius compensation
R0 to the programmed positions.
This cycle requires a center-cut end mill (ISO 1641) or
pilot drilling with Cycle 21.