Re: knee mill to cnc converstion
The two XLO's I retro-fitted, I fitted VFD's and removed the vari-speed, but they had two speed G.B.s also.
If you get rolled B.S. remember to get pre-loaded ball nut, The common rolled variety do not have it and can posses a significant back-lash.
I did get some HiWin (Taiwan) ground B.S. very hard, a ceramic tool had to be used to turn the end down.
There was a guy on ebay used to bring them in by the case load.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.