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« on: March 08, 2017, 08:54:47 AM »
Must say only a novice at using Fusion 360 and have only played with the lathe function and not the other Cam functions in Fusion 360.
In Fusion 360 Cam you define the SETUP which includes all of the parameters associated with how the part will be machined. It includes stock size, tool to be used, orientation of the stock, post processor to be used, etc, etc.
The post processor, which you select, posts gcode based on the SETUP in Fusion. Have a look at the generated code. There is probably a line in the beginning of the gcode file for a G28 ( return to home ).
So the G28 command ( read the G28 command definiton in the Mach manual ) sends you home. Now Mach needs to know where the part is. You must define to Mach where the part is and G54 is the default Work offset when Mach is started. Work offsets are from home to the part.
So, starting from home to machine the part, the work offset provides the distance the part is away from home amd Mach takes that work offset into consideration. If you want to use a different work offset, maybe G55,then the Gcode file must give that instruction to Mach.
BASIC SUMMARY OF ABOVE:
YOU must define to Mach where Machine zero is, where home is, where the part is.
AND UNDERSTAND THAT
What code is generated by the post processor should be in agreement with the way you have set up Mach / are working.
NOTE:
How you work, level of controller automation etc, etc, has an influence on what the posted gcode should provide.
RICH