Stacked Text Part 2

 continued from part 1

The first op at the finish (-0.250") depth is an adaptive clearing operation.  A 0.250" end mill was used.  For "Base Geometry" select all the area surrounding the text items and other largish areas that need to be cleared to full depth.  In this case the internal part of "A" and the 2 pockets inside "O" were selected.  In the adaptive op dialogue "Cut Region" is "Inside" and "Force Clearing Inside-Out" is not selected.

Adaptive path, "A" and "O" paths not shown

    To get the final details at the finish (-0.250") depth there are at least 3 options.  One option would be performing the previous operation with a smaller tool.  That would be simplest but slowest.  Another option is creating an extra model with the 3 text strings merged.  The third option is a repeat of the previous operation with a smaller (0.125") tool but using a large step-over to reduce run time.  I chose the 3rd method using the "Clearing" option in "Operation Type".  Using the "Profile" option would be ideal but unfortunately in this case it would cut into the bottom "HOTEL" text.  I used a variation of the 3rd method that greatly reduced run time with the help of bcnc as an editor.  Editing g-code on on a large tool path may sound miserable but bcnc breaks the code into manageable blocks.  In the next post I'll explain some bcnc's features and explain how it helped in this situation.

After the edits were performed a check was done in Camotics and everything looked okay.  

All that's left to do is cutting whatever small pockets remain.  Some caution was needed not to accidentally cut holes in the "HOTEL" text.

It may be true that all of this can done more efficiently in some commercial  software.  It may also be true (even likely) that I've missed some obvious shortcuts.  What is surely true is this method worked and I have evidence.  

Straight of the machine including sawdust on top of N

 A couple of mishaps not the fault of FreeCad.  The hole in the T is what happens when a machine is jogged in linuxcnc and the user forgets the keyboard lives in user land (not part of realtime)