Blank Form Update (Function Turndata) - HEIDENHAIN TNC 640 User Manual

Hide thumbs Also See for TNC 640:

Table of Contents

Blank form update (FUNCTION TURNDATA)

During turning operations workpieces must often be machined

with several tools. Often a contour element cannot be completely

finished because the tool form does not permit this (e.g. with

a back cut). In this case, single sub-areas have to be reworked

with other tools. The TNC detects the already machined areas

with the blank form update and adapts all approach and departure

paths to the specific, current machining situation. With the shorter

machining paths, traverses in the air are avoided to significantly

reduce machining time.

To activate the blank form update, program the TURNDATA BLANK

function and link to a program or subprogram with a workpiece

blank specification. The workpiece blank defined in TURNDATA

BLANK determines the area to be machined with the blank form

update. TURNDATA BLANK OFF deactivates blank form update.

Danger of collision!

The TNC optimizes machining areas and approach motions with

blank form update. The TNC takes into account the specific

tracked workpiece blank for approach and departure paths. If

parts of the finished part extend beyond the workpiece blank,

this may damage the workpiece and tool.

Define the workpiece blank larger than the finished part

Blank form update is only possible with cycle machining

in turning mode (FUNCTION MODE TURN).

You must define a closed contour as the workpiece

blank for the blank form update (start position = end

position). The workpiece blank corresponds to the cross-

section of a rotationally symmetrical body.

Cycles: Turning | Turning Cycles (software option 50)

HEIDENHAIN | User's manual for cycle programming | 10/2017