The invention provides an
engraving machine with high precision and high stability. The
engraving machine comprises a pedestal, a Y-axis moving module, a
portal frame, an X-axis moving module, a Z-axis moving module and a cutter head main shaft. The Y-axis moving module is installed on the pedestal, the X-axis moving module is installed on a cross beam of the
portal frame, and the Z-axis moving module is installed on a
saddle. The Z-axis moving module comprises a Z-direction sliding block installed on the
saddle, a Z-direction linear guide rail installed on the Z-direction sliding block, a Z-axis sliding table installed on the Z-direction linear guide rail, the cutter head main shaft installed on the Z-axis sliding table, a Z-direction
linear motor installed at the bottom surface of the Z-axis sliding table, a Z-direction motor magnetic plate installed on the
saddle and cooperated with the Z-direction
linear motor, a balance cylinder installed on the saddle, and a Z-direction
grating ruler. The Z-axis sliding table is driven by the Z-direction
linear motor and the Z-direction motor magnetic plate to elevate in the Z axis. A cylinder rod of the balance cylinder is connected with the Z-axis sliding table. The
engraving machine is high in
machining precision, stable in
machining, and long in service lifetime.