HEIDENHAIN TNC 426, User Manual

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HEIDENHAIN TNC 426, TNC 430 131
6.2 F
undamentals of P
a
th F
unctions
Radius compensation
The radius compensation must be in the block in which you move to
the first contour element. You cannot begin radius compensation in a
circle block. It must be activated beforehand an a straight-line block
(see “Path Contours — Cartesian Coordinates,” page 139) or
approach block (APPR block, see “Contour Approach and Departure,”
page 133).
Pre-positioning
Before running a part program, always pre-position the tool to prevent
the possibility of damaging it or the workpiece.
Creating the program blocks with the path function keys
The gray path function keys initiate the plain language dialog. The TNC
asks you successively for all the necessary information and inserts the
program block into the part program.
Example — programming a straight line:
Initiate the programming dialog, e.g. for a straight
line.
Enter the coordinates of the straight-line end point.
Select the radius compensation (here, press the RL
soft key - the tool moves to the left of the
programmed contour).
Enter the feed rate (here, 100 mm/min), and confirm
your entry with ENT. For programming in inches,
enter 100 for a feed rate of 10 ipm.
Move at rapid traverse: press the FMAX soft key, or
Move at automatically calculated speed (cutting data
table): press the FAUTO soft key.
Coordinates ?
Radius comp. RL/RR/no comp. ?
Feed rate F=? / F MAX = ENT
10
5
100