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NEW TECHNOLOGIES | ARTICLE PEM Machining Systems


The PEM machining system is comprised of the following four components:


1. PEM Mechanic


The PEM machine is a granite structure with Z-axis programmable feed and oscillation. Standard machine configurations include provisions for automation and multi-axis (including rotary axis) versions. The PEM400 is shown in figure 1. 2. PEM Control


A completely programmable graphic-based Human Interface provides ease of use, intuitive status displays, data logging and out-of-limits conditions. I/O for tool monitoring and automation are standard. 3. PEM Power Supply


Precise constant current pulses are supplied to the electrode(s) that can be adjusted in duration, frequency and phase relationship to the reciprocating electrode. 4. Aqua System


Provides conditioned electrolyte to the machining gap so that electrolyte continuously flows at the desired rate.


<< Figure 2: Three-machine automated system. >>


A range of fully automated systems consisting of one or many machines is available. An example of a system consisting of three PEM operations on a part is shown in figure 2. In this example, the first machine is creating external features; the second machine is performing a turning operation by rotating the part; and the third machine is machining slots through a 0.5 mm thick workpiece.


>> Continued on page 42


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41 | commercial micro manufacturing international Vol 6 No.6


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