However this week Ive been refurbishing so its much easer to use:
Added Limits on all axis so now it knows where it is most of the time

Added Arduino with CNC Shield with integrated Stepper DrIvers allowing up to 1/32 micro stepping, running latest GRBL (CNC shield is $6 from aliexpress, can't beat that value)
Added PWM and Spindle control so speed and spindle now is fully controlled through the G-Code

Added Tool probe for helping with zeroing and best of all auto levelling for PCB routing
Now using chilipeppr as my control interface (chilipeppr.com)
Heres a taster of it doing an auto level with chilipeppr the autolevel is for doing PCB routing (just no board)
https://www.youtube.com/watch?v=l6xi1BKST9A
One last issue I'm having is the very first touch probe on auto levelling is out so I'm just tracking down that problem. (you can see it in the video)
Next step to build a sound/dust proof housing so I can run it in the house at any time and also use a raspberry PI as the host controller talking to chilipeppr
I'm really excited to start getting back into the small CNC as the software tools are so cheap, i.e. free
Autodesk Fusion 360 for Cad and CAM $0 for makers.....
I've just did a project to test out and learn Fusion 360 and I'm very impressed with it, next is to mill it on the Zenbot, so I'm learning how to use the CAM features.
Stephen...