The reason is that the wire is positioned on an angle by shifting the upper and lower heads relative to one another, so the flushing (which points straight up and down except on a few vintage Agie machines) doesn't penetrate the developing wire cut kerf very well and the result is slow cutting and lots of wire breaks. Something you must be aware of that is specific to your needs for making extrusion dies you need a machine that can cut large tapers, and not all wire EDM machines are capable of that.ģ0 degree tapers are not uncommon for extrusion dies and even on the best machines they are not easy to wire cut accurately, smoothly and quickly. Much has been written on Practical Machinist about this subject here is a link to get you started in your search:
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