HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 569)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 569
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Cutting data, coolant
To determine the cutting parameters, TURN PLUS uses the
 Workpiece material (program head)
 Cutting material (tool parameters)
 The machining operation (main operation in the machining
sequence).
The values determined are multiplied by the tool-dependent
compensation factors (see "Tool data" in the User's Manual).
Note for roughing and finishing operations:
 Main feed rate for use of the primary cutting edge
 Auxiliary feed rate for use of the secondary cutting edge
Note for milling operations:
 Main feed rate for machining in the milling plane
 Auxiliary feed rate for infeed movements
For threading, drilling and milling operations, the cutting speed is
converted into rotational speed.
Coolant: Depending on the workpiece material, cutting material and
machining operation, define in the technology database whether
coolant is used. The AWG activates the appropriate coolant circuits for
the respective tool.
If you have specified that coolant is to be used, the AWG activates the
coolant circulation for the respective machining block.
Inside contours
TURN PLUS machines continuous inside contours up to the transition
from the "deepest point" to a greater diameter. The end position for
drilling, roughing and finishing operations depends on:
 Cutting limit, inside
 Overhang length, inside ULI (Processing machining parameter)
Prerequisite: The usable tool length must be sufficient for the
machining operation. If it is not, then this parameter defines the inside
machining operation. The following examples explain the principle.
Limits for internal machining operations
 Predrilling: SBI limits the drilling operation.
 Roughing: SBI or SU limit the roughing operation.
 SU = basic length of roughing cut (sbl) + overhang length, inside
(ULI)
 To avoid residual rings during the machining process, TURN PLUS
leaves an area of 5° in front of the roughing limit.
 Finishing: sbl limits the finishing operation.