Am playing at the moment in Mach 3 but fully intend to convert to Linux when I get everything working!
I have the encoder cable but just unsure how to connect it . I dont have a pinout for this Bob. (They dont do instructions for this price )
https://www.ebay.co.uk/itm/Mach3-CNC...0AAOSw6Olffu9N

I got to the pin settings for the 0-10v output by trial and error with motor set for step /direction control rather than PWM. It works but I may not have it right and I am struggling to understand how a step /direction signal controls a relay or a voltage output , so I am apprehensive about connecting an encoder without understanding what I am doing and why I am doing it .

Is there any clear guidance or manual for this task.

Prior to this my only experience was the mill function. I can handle the idea that inputs to pins 2 and 3 provide step and direction instructions to a stepper driver for X motion.
Y and Z similarly. and the CNC4 you board had specific instructions for spindle "on " control. I never got around to varying the spindle speed .
Choosing the pin settings to make X Y and Z movements happen seems intuitive enough .
and spindle relay on is not too hard to grasp in Mach. But pwm and encoder settings are at the moment testing my intellect a bit

I have looked for pin settings for this board but cant find specific ones online .

Which Manual are you referring to Inee? Cant see anythingin the Boxford or Lenze manuals and I dont think I have one specifically for the encoder.
Will explore a bit more .
If someone can hold my hand here and tell me which pin settings to select to get me going , I suspect that things will begin to fall into place and from there I can maybe ask the relevant questions to give me an understanding of what settings I have made .