Constant Linear Speed

[IanVicAus]

You may already have this?
For both the mill and the lathe having a rotary encoder to read the spindle speed and an output that can interact with a VDF would be great.
The programming would be desired tool sped ft/min m/min.
The diameter of the rotary object, tool position on a lathe, tool diameter on a mill.

Also on the number of teeth of milling tool this would then allow the calculation and display of the tooth load.
It is this number that mills "should" be operated to. The selection of feed speeds as it is on a manual mill requires the operator to work all of that out. You already display the speed of movement. This would be divided by the number of teeth and becomes the chip load.
I can't see a real need - but on multiple cuts you would also know depth of cut and so could calculate volume removal.

For any axis under control (spindle speed) having a rotary input to vary it from 50 to 150% (say) would also be great.