EDM: Difference between revisions
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*Voltage is 50-300V. Current for 1" cut below is 35A. | *Voltage is 50-300V. Current for 1" cut below is 35A. | ||
*1 pound of wire used per hour to cut a 1/2" hole in a 3" piece of hard metal. - [https://www.mmsonline.com/articles/the-hidden-cost-of-edm-wire-consumption]. that is $5 in wire cost. About $1 per inch of metal. | *1 pound of wire used per hour to cut a 1/2" hole in a 3" piece of hard metal. - [https://www.mmsonline.com/articles/the-hidden-cost-of-edm-wire-consumption]. that is $5 in wire cost. About $1 per inch of metal. | ||
*10x slower than waterjet - [https://advancedmanufacturing.org/waterjet-vs-edm/] | |||
*Waterjet appears to be much better for the speed and cost. But EDM advantage is 10x more precise - [http://info.icee.co.uk/blog/waterjet-cutting-vs-edm] | |||
=BOM= | =BOM= | ||
Revision as of 17:32, 14 April 2018
Electric Discharge Machining. It is simply a spark between a wire and a workpiece. It does super precise cutting and small hole drilling in electrically-conductive materials.
About
- Uses 0.25 mm brass wire for cutting, Mcmaster has 0.5 mm wire - $30/lb - [1]
- Voltage is 50-300V. Current for 1" cut below is 35A.
- 1 pound of wire used per hour to cut a 1/2" hole in a 3" piece of hard metal. - [2]. that is $5 in wire cost. About $1 per inch of metal.
- 10x slower than waterjet - [3]
- Waterjet appears to be much better for the speed and cost. But EDM advantage is 10x more precise - [4]
BOM
- EDM wire - $40 for 6 lb - [5]