Carl, It depends on what system you are thinking of using to retrofit, yes for threading you require an encoder which should be driven off of the final spindle shaft for best results and a CNC system that will recognize and able to implement the threading G-codes. Also it is preferable to have maybe one gear reduction as well as direct drive for turning at really low spindle rpm, the motor is then not rotating at really low rpm. It also depends on what kind of spindle drive you have. DC, Variable AC or Standard AC Induction motor.
BTW one nice feature of CNC threading is the ease of using single edge cutting on a thread and taper out at the end using the G76 function if the control has it.
Al
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CNC, Mechatronics Integration and Machine Design.
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Last edited by Al_The_Man; 08-19-2004 at 06:27 PM.
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