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degrees. Values returned by unary operations which return angle measures
(ACOS, ASIN, and ATAN) are also in degrees.
The FIX operation rounds towards the left (less positive or more negative) on a
number line, so that FIX[2.8] =2 and FIX[-2.8] = -3, for example. The FUP
operation rounds towards the right (more positive or less negative) on a number
line; FUP[2.8] = 3 and FUP[-2.8] = -2, for example.
Parameter Setting
A parameter setting is the following four items one after the other: (1) a pound
character # , (2) a real value which evaluates to an integer between 1 and
5399, (3) an equal sign
= , and (4) a real value. For example "#3 = 15" is a parameter setting meaning
"set parameter 3 to 15."
A parameter setting does not take effect until after all parameter values on the
same line have been found. For example, if parameter 3 has been previously set
to 15 and the line "#3=6 G1 x#3" is interpreted, a straight move to a point
where x equals 15 will occur and the value of parameter 3 will be 6.
Comments and Messages
Printable characters and white space inside parentheses is a comment. A left
parenthesis always starts a comment. The comment ends at the first right
parenthesis found thereafter. Once a left parenthesis is placed on a line, a
matching right parenthesis must appear before the end of the line. Comments
may not be nested; it is an error if a left parenthesis is found after the start of a
comment and before the end of the comment.
Here’s an example of a line containing a comment: "G80 M5 (stop motion)".
Comments do not cause a machining center to do anything.
A comment contains a message if "MSG," appears after the left parenthesis and
before any other printing characters. Variants of "MSG," which include white
space and lower case characters are allowed. The rest of the characters before
the right parenthesis are considered to be a message. Messages should be
displayed on the message display device. Comments not containing messages
need not be displayed there.
Item Repeats
A line may have any number of G words, but two G words from the same modal
group may not appear on the same line.
A line may have zero to four M words. Two M words from the same modal group
may
not appear on the same line.
For all other legal letters, a line may have only one word beginning with that
letter.
04 December 2015
Release 4.02
115