Creating An Nc Program; Available Characters - Siemens Sinumerik 840D sl Programming Manual

Creating an NC program

4.2 Available characters

3. Create a machining plan
Define all machining operations step-by-step, e.g.
– Rapid traverse movements for positioning
– Tool change
– Define the machining plane
– Retraction for checking
– Switch spindle, coolant on/off
– Call up tool data
– Feed
– Path correction
– Approaching the contour
– Retraction from the contour
– etc.
4. Compile machining steps in the programming language
– Write each individual step as an NC block (or NC blocks).
5. Combine the individual steps into a program
4.2 Available characters
The following characters are available for writing NC programs:
● Uppercase characters:
A, B, C, D, E, F, G, H, I, J, K, L, M, N,(O),P, Q, R, S, T, U, V, W, X, Y, Z
● Lowercase characters:
a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z
● Numbers:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
● Special characters:
See the table below.
Special characters
%
(
)
[
]
<
>
:
=
42
Meaning
Program start character (used only for writing programs on an external PC)
For bracketing parameters or expressions
For bracketing parameters or expressions
For bracketing addresses or indexes
For bracketing addresses or indexes
Less than
Greater than
Main block, end of label, chain operator
Assignment, part of equation
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals