4th Axis production model. Makes same test part twice as fast!

This is the final working prototype of the production version (will be available for purchase) of the 4th axis. Special Mach3 macros make it possible to switch back and forth from indexer (axis) to spindle modes. What’s new? Bigger than last version. More powerful thanks to new servo drive from CNCdrive. Simplified for production (read: much less expensive) by eliminating idler and threaded pre load collar. New GT2 belt is stronger and much quieter. Higher quality, more accurate spindle.