Method for monitoring the operation of an electrostatic coating

Details Method for monitoring the operation of an electrostatic coating Method for monitoring the operation of an electrostatic coating

1985-12-13

1988-08-16

Lawrence, Evan K.

Coating processes

Measuring, testing, or indicating

427 33, B05D 106

Patent

active

047643935

ABSTRACT:
In the electrostatic coating of large workpieces, for example vehicle bodies, the installation must be switched off automatically in order to avoid a voltage breakdown when the operating current rises to a threshold value predetermined as a function of the operating voltage which is adjustable over a certain range. To this end, all threshold values applicable to selectable voltage values are stored jointly, more particularly in a microprocessor, and when the installation is in operation, they are selected automatically according to the voltage which has been adjusted. A warning signal is produced when an intermediate threshold value of the current is exceeded, where the intermediate value has been automatically adjusted between the normal and threshold values of the current.

REFERENCES:
patent: 4092440 (1978-05-01), Wohr et al.
patent: 4257347 (1981-03-01), Stahl
patent: 4402030 (1983-08-01), Moser et al.
patent: 4469723 (1984-09-01), Haq

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