Ron's Brain Dump

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===== Design/Toolpath =====
==== Job Setup ====
  * X-Y datum is **CENTER of material**
    * actually this is problematic; if you set the X-Y origin to a bottom (left or right) point you zero off the end of the material (or as far as you want the cuts to go) which ensures you have enough material, especially if, like me, you set the rotary motor AND chuck BEYOND the physical max-Y range of the machine so that it is LITERALLY impossible for the cutter to reach the rotary axis motor (one less thing to worry about)
  * orientation is **along the Y axis**
  * calculate roughing and finishing cuts as normal
  * 3D-raster at **90-degrees**
    * that way less rotation, more travel along the Y, should be faster (tho i haven't measured this yet)
  * when saving toolpaths **select correct post-processor** (e.g., "Axiom HHC CNC 4TH")
    * this is how the X axis motion is translated into A axis rotation 

==== Material Prep ====
  * rough material to diameter + a couple mm
    * to make this easier set your material size proud and accept a longer roughing cut that might be cutting air for a while
  * mark center line on piece
    * not needed if you know the mid-axis X value and set the Y=0 to a bottom corner
  * measure center end-to-end for finding XY=0
    * again, not needed if you zero of a lower corner
  * to zero Z axis either
    * touch-off puck Z to metal bed
      * then +Z to 75mm and re-zero
    * or create a 75mm block to use for Z-axis 0-ing
      * this is what i did - machined a block of maple 75mm thick and use that + touch-off puck to zero the Z to the center of the material