Please Note While Programming - HEIDENHAIN TNC 620 User Manual

10
Fixed Cycles: Multipass Milling
10.3 RULED SURFACE (Cycle 231, DIN/ISO: G231, software option 19)
Cutting motion
The starting point, and therefore the milling direction, is selectable
because the TNC always moves from point
total movement from point
1
point 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
spindle-axis coordinate of point 2) for slightly inclined surfaces.
A drawing cut (spindle axis coordinate of point
spindle-axis coordinate of point 2) for steep surfaces.
When milling twisted surfaces, program the main cutting
direction (from point
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
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.
234
1
to point
1 2 3 / 4. You can program
/ to point
1 to point 2) parallel to the direction of the
1 to point 2) perpendicular to the direction
2
and in the
1
greater than
1
smaller than
TNC 620 | User's Manual Cycle Programming | 3/2014