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--- mycnc:macro_examples [2017/06/14 17:35] – skirillov
+++ mycnc:macro_examples [2017/09/04 12:13] – skirillov
@@ Line 1: / Line 1: @@
-==== Rotate A axis to 0 position ====
+==== Macro Examples ====
-For some applications A-axis is programmed as endless rotation.
+  * [[mycnc:move-a-to-0|Move A to 0]]
-Program position of A may come to many hyndreds degree after G-code finished. See screenshot example below -
-{{mycnc:mycnc-1280m4-001.png}}
-To start new job A position should be roll back to about "0" position. Jogging to "0" may take a long time. In some cases it's possible just reset A position, but A axis orientation will be lost.
-The best way to substract from current A-coordinates a whole number of turns (360 degree), then move to "0".
-This can be done through macro-programming.
-We will add macro M335 to bring A axis to "0", then add a button to run the macro.
-A-axis program position value is mapped to global variable #5044. In the macro we -
-  * Check if A-position is positive
-  * Add a code loop,
-  * Test in the loop A-coordinate and subtract 360 degree if current coordinate is more than 360 degree (more than 1 turn).
-  * Store result value as current A-axis position and then
-  * Move A-axis to "0".
-  * Add similar branch for negative A-coordinate value.
-<code php M335>(Move to position A=0)
-#10=#5044 (Get position A)
-if [ #10 LT 0 ] 300 (Test If A-position is negative)
-(if positive)
-N100
-if [ #10 LT 180 ] 200 (Test if A-position higher than 180 degrees)
-#10 = #10 - 360 (Subtract a whole turn - 360 degree)
-JUMP 100 (Jump to begin of the Loop)
-N200
-JUMP 400
-N300
-if [ #10 GT -180 ] 400 (Test if A-position lower than -180 degrees)
-#10 = #10 + 360 (Add a whole turn - 360 degree)
-JUMP 300 (Jump to begin of the Loop)
-N400
-G90 G10 L70 P#5220 A#10 (store #10 value as A-axis program position)
-G90 G0 A0 (rotate A axis to 0)
-</code>
-[[Add move A to 0 button]]