- Joined
- Oct 21, 2017
- Messages
- 504
There are indeed systems that use dual feedback loops for motion control. here is a video on the Galil site that explains it. You have to sign up (for free) to view it, but its worth it as they also have other videos and downloads that are very informative.
http://www.galilmc.com/learn/online-videos/dual-loop-compensation-methods
I am on the same path, in the (slow) process of CNCing my mill with dual encoders, that will give absolute position. I also want full manual function. So far, I have the DRO installed, once I feed the linear encoders into the PC, it will give the XYZ positions on the monitor, the DRO readout will be reused on another machine. You will need a motion controller capable of dual encoder input. Galil makes some of the best but they are expensive.
Just install servos and a good motion controller that supports servo drives - job done, cheaper and less effort than trying to forge your own path that almost no one else uses - for good reason ;-)