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WinMax Lathe NC Programming
704-0115-307
Overview
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Sequence Number
A sequence number serves as a block label; it has no other significance within the part
program except being required with GOTOs in the NCPP option and the M99 jump
command. Sequence numbers are often used to mark the beginning of milling sequences
so you can restart at a given sequence number or recall specific operations within the
program.
When programming on an off-line system, sequence numbers should be used sparingly.
Sequence numbers (N words) are optional in the NC Editor, and they are useful in
programs sent over the RS-232 link. However, the absence of sequence numbers permits
faster processing (loading, syntax checking, and parsing) of the part program and can
result in improved part program execution. In addition, omission of these numbers
increases the amount of the program that can fit into memory.
Address Characters
An address character is the first character of a word in a program block. The following is a
list of the address characters recognized by this system:
If you request renumbering of part program sequence numbers, any
sequence numbers in GOTO statements will not be updated. In
general, you will not want to renumber part programs that use GOTO
statements. Refer to Renumbering and Tagging Menu, on page 1 -
23 for renumbering information.
/ Block Skip Command. Specify blocks of code that are skipped when this control
feature is enabled. The specified block, or portion of a block, begins with a “/”
(forward slash). Refer to Block Skip Code, on page 1 - 6 for more information about
Block Skip.
( ) Comment Command.
Comment statements provide information about the part
program.You can insert comment statements at the end of any part program
block by enclosing the comment within parentheses. You may make an entire
block of code a comment statement by enclosing it within parentheses.The
Comment Command characters are used to delimit comments.
F Feedrate. Sets the modal feedrate for cutting moves.
Pitch. Sets the pitch for threading.
G Preparatory Functions. G codes have two basic functions:
• specify a modal condition. For example, G20 establishes Inch mode, G21
establishes Millimeter mode, G90 establishes Absolute mode and G91
establishes Incremental mode. Programming G20 Inch mode and G90
Absolute mode in the first block of a part program tells the control to remain
in inch mode until G21 Millimeter mode is programmed, and to remain in
Absolute mode until G91 Incremental mode is programmed.
• specify the type of tool motion (example: G00 programs a rapid move, G01
programs a linear feed move, G02 and G03 program circular moves).
I X-axis Center/Offset coordinate for programming geometric information needed
to determine the endpont of a motion command.
K Z-axis Center/Offset coordinate for programming geometric information needed
to determine the endpoint of a motion command.