How does an engraving machine work?

Computerized engraving paths

To complete the production of a circuit board, the first step is to know which parts are to be retained, which parts are to be milled, so that the tool along what route to achieve our purpose. In this system, we use the high-speed computing performance of personal computers, PCB files from PROTEL to obtain the relevant information, after the conversion of the algorithm to obtain the spindle head movement of the route, this process is called computer engraving path.

Command transmission

Control software from the PCB file to obtain circuit board processing information, its automatic conversion, decomposition into circuit board production can be accepted as a separate action instructions, and this collection of action instructions to form a machine PCB engraving machine processing path. In the receipt of user commands, such as the user presses the “carve” button, the control software will process the path through the serial communication port will be transmitted to the circuit board making machine instructions one by one. Each time the circuit board maker completes an action command, it reports the command completion signal to the computer. After completing all the work, the control software transmits a stop message to the machine, and the machine stops working.

According to the instructions transmitted by the computer, the central processor of the circuit board production machine according to the principle of motion control, control the speed and direction of the three stepper motors to coordinate the work, the completion of the instructions to the computer to send instructions to complete the signal.

Combined motion control

In this machine, three independent of each other's linear motion guide rail installed perpendicular to each other. Y-axis carriage drives the work platform forward and backward motion. X-axis carriage drives the Z-rail and installed in the Z-rail spindle motor left and right movement. Z-axis PCB engraving machine drives the spindle motor up and down movement. Three axes under the coordinated control of the CPU, so that the spindle driven high-speed rotating tool relative to the workpiece to do three-dimensional spatial movement, so that the workpiece (circuit board) processing into a finished product in line with user requirements.

For example, when the Z-axis is stationary and the tip of the tool is slightly below the surface of the board, the Y-axis is stationary and the X-axis is moving. At this time the main tool will mill a straight line in the X direction on the circuit board, the width of the tool is equivalent to the width of the tip of the tool. X-axis is stationary, Y-axis movement, the main tool will be engraved in the Y direction of a straight line, when the X, Y simultaneous movement and the speed of the same, the engraving machine's tool will be engraved in the circuit board, a 45-degree diagonal line. Control X, Y are at different speeds, can be engraved on the plane at different angles of the straight line, control the movement distance, through a variety of combinations can be engraved on the plane of different shapes.

When the Z-axis is stationary and the tip of the knife is higher than the surface of the circuit board, the tool PCB engraving machine will move to the point to be engraved through the movement of X and Y.

When XY is stationary, the Z-axis moves down the thickness of the circuit board, SMT mounter, the spindle motor drives the drill bit to drill holes in the current position of the circuit board.

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