HEIDENHAIN TNC 640 User Manual

Programming Contours | Path contours  Cartesian coordinates
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
Inserting a chamfer between two straight lines
The chamfer enables you to cut off corners at the intersection of
two straight lines.
The line blocks before and after the CHF block must be in the
same working plane as the chamfer.
The radius compensation before and after the CHF block must
be the same
The chamfer must be machinable with the current tool
Chamfer side length: Length of the chamfer,
and if necessary:
Feed rate F (effective only in CHF block)
Example
7 L X+0 Y+30 RL F300 M3
8 L X+40 IY+5
9 CHF 12 F250
10 L IX+5 Y+0
You cannot start a contour with a CHF block.
A chamfer is possible only in the working plane.
The corner point is cut off by the chamfer and is not part
of the contour.
A feed rate programmed in the CHF block is effective
only in that CHF block. After the CHF block, the previous
feed rate becomes effective again.

HEIDENHAIN TNC 640 Specifications

General

Control Type	CNC
Axes	Up to 18 axes
Interfaces	Ethernet, USB, RS-232
Spindle Control	Yes
PLC	Integrated
Storage	SSD
Programming Languages	DIN/ISO
Safety Features	safety functions according to EN ISO 13849-1
Dimensions	Varies based on configuration
Weight	Varies based on configuration
Operating System	Windows