CNC zeroing : need for more smaller steps (at least 0.05mm)

[clsergent]

Field of application: CNC
Context: PCB engraving request very precise zeroing (at leat 0.05mm precision)
Problem: UI only allow to move the toolhead by 0.1mm steps (using 0.1mm button)
Request: 0.01mm (or at least 0.05mm) step button to move the toolhead more precisely

Remarks:

• 3D printing calibration and z-height control already allow 0.05mm steps
• another way could be to allow to reach any position (with at leat 2 decimal points) using a virtual keyboard