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PCB Processing

Printed Circuit Board (PCB) Processing

The processing of printed circuit boards involves two important cutting procedures. The first is to drill the conducting channel between circuit layers and fixture the pores for welded components. The second procedure is to cut the PCB into the required dimensions by using a routing machine. PCB has become a vital component in the highly developed information, communication and electronic industries. Many mainstream PCB producers choose Tongtai Machine & Tool's drilling and routing machines in order to meet their stringent requirements and satisfy the requirements of processing speed and precision.

Printed Circuit Boards

PCB Drilling Machine

Tongtai's SD & SR series CNC drilling machines have 1 to 7 processing spindles which are able to fit with various board dimensions and different sorts of mass production requirements. The machine's main frame and main components are made from highly stable cast iron, enhancing its processing precision and stability. The Z-axis structure is made from light weight and high rigidity aluminum alloy. Not only does this improve the processing efficiency, it also offers good vibration absorptivity. The spindle of the SD series can reach up to 250,000rpm, and is equipped with a 400 tools/axis capacity of automatic tool changer system, laser tool measuring system and broken bit detection system. The patented pressure foot has high reliability and high chip collection capability which can improve the processing accuracy. The SIEB & MEYER controllers can achieve a processing speed of 125us in addition to providing an outstanding human machine interface, thus allowing for highly accurate depth control functions.

Strong rigidity structure design

Light weight Z-axis structure

SEIB & MEYER controllers

Real-Time Broken Bit Detection

The function of contact Bit Detection is to judge if the tool, work piece and machine have become a circuit. When the tool is in good condition, the tip of the tool can touch the surface of the board (has to be conductive material), thus becoming a circuit. However, when the bit is broken, the tool will not be able to touch the surface which fails to become a circuit.

Conducting circuit

Broken bit status

Depth Controlled Peck Drilling

Depth controlled peck drilling is the function combined with real-time broken bit detection and peck drilling. Machine operators can set the parameters on the control page, and also insert the parameters into the process code to avoid any human errors.

Depth control

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