Automatic Electronic Print Head Testing
Original Publication Date: 1985-Jul-01
Included in the Prior Art Database: 2005-Feb-18
A technique is described whereby print heads are tested, in one combined automated process, for short circuits between electrodes and for open circuits within an electrode. A consistently reliable and documented testing of print heads is performed at acceptable automated production rates. Testing is controlled by an IBM Personal Computer (PC). The print head tester, as shown in Fig. 1, consists of actuators 1 and 2 which control the movement of print head parts under test. Upper test head 3 consists of 45 spring-loaded connectors which make contact with the adjacent pins on test card 4 which, in turn, is connected to lower test head 5. Connected to lower test head 5 are another series of spring loaded connectors which are clamped to the 41 electrode lands of the print head.