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The "Medium-Speed WEDM (MS-WEDM)" method is actually a word-for-word translation from the Chinese language.

Pay attention to these five aspects and you can avoid the confusion. Just a side note, careful how suppliers quote their specs! Specs without context are not reliable.

Accuracy and Surface Finish

Brass wire EDM machines can achieve super high accuracy and mirror-like surface finish, courtesy of the multi-pass cutting control, stable wire tension control, optimal dielectric fluids, etc. They are called "low-speed" WEDM machines, or maybe "slow wire", in the Chinese WEDM industry.

Molybdenum wire EDM machines are optimized for rapid EDM processing, which compromises their ability to achieve the maximum accuracy and surface quality that brass wire cutters or "low-speed" machines can achieve.

Then, there comes the "medium-speed" WEDM solution with the capability of running fast and delivering accuracy and surface finish near brass WEDM quality.

Efficiency

"MS-WEDM" machines can operate at a speed close to "HS-WEDM" during the first pass while maintaining overall efficiency higher than "LS-WEDM" during finishing passes. That's the balanced efficiency it aims at. 

Applications

This part mainly focuses on 2 things: material compatibility and complex geometries.

5-axis CNC WEDM machines can handle difficult shapes and contours, and some special materials need additional devices and treatment processes.

Tech Upgrades

From cutting path drawing to discharge parameters setup at the control, from the execution of the command to the real-time feedback loop, we can see the cost of the machine configuration and its tech content.

"MS-WEDM" machines integrate many precision hardware components into its system while maintaining a cost-effectiveness advantage over brass wire EDM equipment on the condition that both can meet the same requirements.

Cost-effectiveness

While it is not appropriate to evaluate cost-effectiveness in isolation from machining requirements, consumable costs, failure rate and more, generally speaking, "HS-WEDM" is the cheapest, "LS-WEDM" is insanely expensive, while "MS-WEDM" strikes a balance between cost and performance. 

Maybe 1 "low-speed" WEDM machine buys 2 to 5 "medium-speed" WEDM machines, while each "MS" WEDM machine buys 2 to 7 "high-speed" machines.

Evaluate all factors you can think of, and then you can see the role of "middle-speed" WEDM. It is basically an option between brass wire electro-discharge machining machines and economical molybdenum wire spark erosion machines.