I'm working on getting a Taig 2019 Manual mill. I "grew up" working on a couple of Bridgeports with DROs, and I'm a complete slave to having one. I've seen that the "normal" way of doing it is cheap chinese calipers modded to work as linear slides. I'm considering eventually CNCing this, and I have two questions that are connected.
Does the output from the chinese slides work similarly enough to a quadrature encoder that they could be used as encoders for a closed loop system? If not, is the backlash in the Taig low enough that you could reasonably use a rotary encoder on the shaft connected to a Shumatech 350 DRO and get good results? I don't want to spend a couple hundred on slides that I can't use since the Shumatech can take quadrature encoder inputs according to the website.
At home I have a big closed loop CNC that I have converted from original control software to use EMC2, DC Servos on ballscrews, and it is rock solid. I've used a Taig on steppers and it's a solid machine, I just love the direct input of working on a manual mill. The second option is to use Mesa Electronics boards as if I were doing a CNC conversion and just skip the DC motors for now, since a closed loop system is considered optimal while driving all the axes though CNC, I expect that the encoders will be good enough for use with a DRO.
Please feel free to tell me why I am wrong.