Thought this may be of interest.A mod I did 2-3 years ago.
Sorry, for the quality of the video as I am not?a professional movie maker.
As I regularly cut largish?diameter bar up to 120 mm dia, held in a standard 4" (100mm ) Chuck
using special soft jaws, I decided it would be practical?and doable to increase the cutting?RPM?s as I moved to the center.thus constantly changing the cutting surface speed keeping to optimums.
This avoids taking one hand off the cross slide handle to alter the speed on the lathe control box pot and
therefore not creating ?"dwell" marks on the surface as you are cutting.
I like to use hands crossing over one another when feeding, that's the reason I made larger hand wheels than
those silly "spoke" ?type that came with the machine.
The CSS principle is similar?to CNC lathes using the G96 and cancels with G97 codes.
Very basically, the wiring configuration is a sliding "pot" attached to the top of the cross slide,
similar to the types found in recording studios etc.
This sliding?pot is wired into the two other pots that control and set the starting and finishing speeds
as determined by the type of metal to be cut,?
From there to the original pot on the lathe control box.
There is a 3-way switch and the 2 ?start and?finish speed pot knobs on the CSS plastic control box that is adjacent to the main lathe control box.
The 3-way switch allows CSS and or normal lathe and the center position isolates the CSS and the main lathe pot.
It all works very well.
I fitted my?own gear reduction drive unit to the lathe, that?s why I can get good torque and good cutting out at large diameters without stalling the machine.
Thanks, again?may be of interest to some of the forum members.
John
Spain
