Tools With A Relevant Tool Point Direction - Siemens SINUMERIK 828D Function Manual

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If a tool clearance angle (tool parameter 24) of zero is entered, relief cutting is not monitored

in the turning cycles.

Please refer to the following documentation for a detailed description of the tool clearance angle:

Programming Manual Cycles

Tools with a relevant tool point direction

The following must be observed for tools with relevant cutting edge position:

The straight line between the tool edge center points at the block start and block end is used to calculate

intersection points with the approach and retraction block. The difference between the tool edge reference

point and the tool edge center point is superimposed on this movement.

For approach and/or retraction with KONT, the movement is superimposed in the linear subblock of the

approach or retraction movement. Therefore, the geometric conditions for tools with or without relevant cutting

edge position are identical.

In circle blocks and in motion blocks containing rational polynomials with a denominator degree > 4, it is not

permitted to change a tool with active tool radius compensation in cases where the distance between the tool

edge center point and the tool edge reference point changes. With other types of interpolation, it is now

possible to change when a transformation is active (e.g. TRANSMIT).

For tool radius compensation with variable tool orientation, the transformation from the tool edge reference

point to the tool edge center point can no longer be performed by means of a simple zero offset. Tools with a

relevant cutting edge position are therefore not permitted for 3D peripheral milling (an alarm is output).

The subject is irrelevant with respect to face milling as only defined tool types without

relevant cutting edge position are permitted for this operation anyway. (A tool with a type,

which has not been explicitly approved, is treated as a ball end mill with the specified

radius. A cutting edge position parameter is ignored).

Basic Functions

Function Manual, 09/2011, 6FC5397-0BP40-2BA0

W1: Tool offset

18.4 Tool cutting edge

Sinumerik 840d sl