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●CNC-300 how to assemble X axis ball screw & adjust backlash


1.How to disassemble and assemble X axis ball screw

2.How to adjust backlash

3.How to adjust tool center

From 2013, EASTAR had modified the all CNC slotting machine ball screw to right hand thread instead of old left hand thread.  

Please change the parameter NO. 41 to 1 instead of original setting value 0. The setting is for change the + direction at right direction), please note to change the parameter 41 value after you replace the new X axis ball screw.


  1. Please replace the X axis ballscrew for CNC-300
  2. Please note to change the parameter 41 value setting to 1.