ACU-RITE CNC 3500i - Manual (Page 430)

404 11 G-Code Edit, Help, & Advanced Features
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Example 2 contains two levels of indirection (N219) and shows how
the contents from multiple variables can be assigned to a command or
expression.
 At Block N215, variable #119 is set to constant 100.
 At Block N217 one is added to the contents of variable #119.
 At Block N218 variable #120 is set to constant 119.
 Block N219 moves the X-axis to the position contained in variable
#120 via two levels of indirection. The first level is the content of
variable #119. The second level is the content of variable #101,
which is incremental in the loop at Block N217 to introduce the
contents of variables #102, #103 and #104.
The X-axis moves to X1; X2; X3; and X4.
Storing Result of Computation
When a mathematical expression is programmed, variables on the left
side of an equation store the computed result.
N250 #110 = #20 + #35
N260 #120 = #18 / 2
 At N250, #110 contains the sum of the contents of #20 and #35. At
N260, #120 contains the result of the contents of #18 divided by 2.
 Parentheses establish an order of operations or denote special
functions.
N300 #140 = (#11 * #115) / 2
N310 #141 = sin (45)
N320 #142 = (#141 * #140) ; * #142 is shortest side
Multiplication operations must be in parentheses or the
3500i treats the multiply command (*) as a comment sign
and disregards the rest of the line following the sign (*).