Modified MiniMill™ Displacement Due to Tool Loading
A 30 Newton tool load was applied to the Z axis at full extension in the negative X direction.
The FEA estimated 6.2 microns of displacement with this load
This yields a machine stiffness of:
5 N/micron (27,000 lbf/in)
The previous slide showed an estimate of 5 mm for deflection at the tool tip. Did the extra 1.2 mm come from the deflection of the Z axis itself?