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Detection of Electrode Pressure on Metal Paper for Electroerosion Printers

IP.com Disclosure Number: IPCOM000041596D
Original Publication Date: 1984-Feb-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Goldrian, G: AUTHOR [+2]

Abstract

The electrode pressure should be sufficient to ensure good electrical contact. Too high a pressure would damage the metal paper 1, whereas too low a pressure would lead to incomplete or missing erosion and thus to a poor print quality. The negative influence of particular parameters (for example, changes in roughness, conductivity and pressure, irregular electrode profiles) is compensated for by an increased electrode pressure, but the magnitude of this pressure must be just adequate. For this purpose, the correct electrode pressure is determined by the printer itself in that each electrode 2 is initially subjected to a low voltage U1 by means of an ignition driver 3. U1 is lower than the voltage required for sustaining the burning or arcing process. For arcing, an arcing driver 4 applies a voltage U2 to the electrode.

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Detection of Electrode Pressure on Metal Paper for Electroerosion Printers

The electrode pressure should be sufficient to ensure good electrical contact. Too high a pressure would damage the metal paper 1, whereas too low a pressure would lead to incomplete or missing erosion and thus to a poor print quality. The negative influence of particular parameters (for example, changes in roughness, conductivity and pressure, irregular electrode profiles) is compensated for by an increased electrode pressure, but the magnitude of this pressure must be just adequate. For this purpose, the correct electrode pressure is determined by the printer itself in that each electrode 2 is initially subjected to a low voltage U1 by means of an ignition driver 3. U1 is lower than the voltage required for sustaining the burning or arcing process. For arcing, an arcing driver 4 applies a voltage U2 to the electrode. If a low current is detected by a current level detector 5 each time the electrode is fired at a new print position, the electrode pressure is satisfactory. But if the detected rate (obtained by counting the current detections of successively tested electrodes) is less than, for example, 50%, then the contact pressure is too low. On the other hand, if at a reduced voltage the detected rate is still close to 100%, this indicates that the electrode pressure is too high. Printer adjustment is optional if the pressure of all electrodes is satisfactory. For an irregular electrode...