The mechanical structure and working principle of knife device

As shown in figure 1, engraving pattern in the body, together with the workbench, fixture, workpiece is good conductors, received the ground from the 5 v power supply, engraving head among fixed on the body when using a special insulation materials, the circuit is separated from the body, after 5 v power supply to the anode. CNC system sends out the instruction, the knife device to the Z axis feed motor stepping down a pulse ( Step away from 0. 001mm) 's instructions, and then test whether engraving head electrical signals for low level, such as low level said engraving head comes into contact with the workpiece, such as high level said engraving head has not been in contact with the workpiece, continue to feed the instructions. The accuracy is not greater than zero. 002mm。

figure 1 engraving machine mechanical structure schematic
multi-station CNC engraving of knife device adopts multiple independent control system respectively to control multiple head carving in the automatic detection of knife (before every sculpture feed Equipped with CNC system, by each in front of the feed control system independently of the knife, the knife after the completion of the unified sent by CNC system motion instructions) 。 Of carving knife using electrical contact detection, head and artifacts 5 v power supply is the cathode, respectively, after contact detect electrical signals corresponding to immediately stop the knife. Due to the cutting tool in high speed rotating state, to achieve reliable electrical signal detection, need fixed outside the engraving head piece and high-speed spindle with laser carbon brush contact pressure, ensure reliable level signal and continuity. The method is of high detection sensitivity error is less than 0. 002 mm, in actual use knife probability is less than 0. 0001%.
engraving machines, engraving and milling machine price price and other information in the numerical control network.