... , ball screw 3.steper CE,ISO BV cnc router can changer tool by pneumatic 3 spindleApplication:BD1325 woodworking machine apply ... 2By adding pneumatic cylinder to make Columned Auto-tool changing, safe and save time, change between three different tool spindle,easy ... as continuing carving when occurring breakpoint off power, processing time can be forecast, back to the origin, and automatic correction ...