US Patent: 3,988,560
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| Method and Apparatus for Controlling Generation of Machining Pulses in EDM Power Supply
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Patentees:
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| Jerry Earl Losey (exact or similar names) - Fort Thomas, Campbell County, KY |
| John Richard Witzel (exact or similar names) - Milford, Hamilton County, OH |
| Harry Dean Kauffman (exact or similar names) - Cincinnati, Hamilton County, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 29, 1975 |
| Granted: |
Oct. 26, 1976 |
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Joel Havens
"Vintage Machinery" entry for Cincinnati Milacron, Inc.
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Description: |
| Abstract:
In an EDM process, a method and apparatus are disclosed for determining the quality of a machining gap by detecting a voltage signal across the gap in response to a low power pulse applied immediately prior to a machining pulse. Upon detecting a first predetermined number of consecutive inferior gap voltage signals in response to corresponding low power pulses the application of low power pulses and machining pulses is terminated for a predetermined period of time. Thereafter, only the low power pulses are applied to the machining gap; and after detecting a second predetermined number of consecutive good gap voltage signals in response to corresponding low power pulses, the machining pulses are reapplied.
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