Can the PCB molding machine use the electric spindle?

The PCB molding machine can use the electric spindle for drilling, milling, and other precision machining operations. The electric spindle can provide high speed, high precision, and low noise operation, making it a popular choice for PCB manufacturers.

Printed circuit boards (PCBs) are important components in almost all modern electronics. To protect these fragile circuit boards, they are often encapsulated in plastic or epoxy resin. Most PCB molding machines rely on hydraulic or pneumatic systems to drive the molding process, and modern society is exploring the possibility of using electrical spindles instead. This article explores the feasibility and potential advantages of using electrical spindles in PCB molding machines.

Advantages of electric spindles

Spindle motors offer a number of potential advantages over the hydraulic systems used in PCB molding machines. First, they allow for more precise control of the molding process, resulting in consistently high quality molding with less scrap. Second, motorized spindles generate less heat and noise during operation than hydraulic systems. Additionally, for high-volume molding machines, electric spindles offer significant energy savings.

Integration challenges

Although promising, the effective integration of electrical spindles into PCB molding machines poses a number of challenges. The spindles that generate the necessary energy are large and heavy. The machine frame must be reinforced to support them without bending out of shape. Sturdy fixtures and mounts were also needed to maintain alignment.

The power and control architecture also had to be redesigned to support the spindles. High-voltage, three-phase power is required to generate the torque needed for molding. Transferring this power to the moving spindle requires rugged slip rings and a customized control board to interface with the spindle motor.

For established machines, retrofitting the motorized spindle would require the replacement of many machine components, which is very costly.


A motorized spindle driven PCB molding machine offers many advantages. However, to fully realize these advantages, certain issues need to be overcome.

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