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Proper maintenance of inkjet heads is crucial for optimal printing performance. This guide outlines the procedures for using cleaning and ultrasonic units to clear clogged heads. Ensure that necessary materials, including solvent and a cleaning unit, are prepared before starting. Detailed mechanical and electrical stages are described to systematically check and clean the nozzles. Recommended practices include regular inspections, using distilled water for ultrasonic baths, and adjusting flushing pressures for persistent clogs.
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Cleaning Unit • When installing new/used inkjet heads on the machine or handling clogged heads, it is necessary to use the cleaning unit. Confidential
Cleaning Unit (Cont.) • Cleaning the inkjet heads is performed on an as-needed basis, or before inserting a new inkjet head into the system. • Inkjet heads are cleaned one at a time. • Before using the cleaning unit, make sure that: • Filter is clean. • Solvent is clean. • Container is full. Confidential
Washing Unit (Cont.) • Before performing the cleaning procedure, ensure that the following materials are prepared: • Cleaning unit • Four liters of ink solvent • Large plastic container Confidential
Mounting holes Inkjet Head Preparations – Visual Check Orifice plate Two 50-pin flat cables Confidential
Tubes Plastic container Preparation of the Cleaning Unit • Fill the large plastic container with ink solvent. • Place the plastic container in the back of the cleaning unit. • Insert the two tubes from the back of the bath into the plastic container. Confidential
TAB 4 Venting screw TAB 3 TAB 2 TAB 1 Preparation of the Cleaning Unit (Cont.) Confidential
Venting screw Tap 3 Tap 4 Venting Screw Tap 2 Let the washing unit work for 2-5 minutes with cover closed. Tightenmounting screws Inkjet head in the cleaning unit bracket Mechanical Stage Confidential
Mechanical Stage (Cont.) • The mechanical stage flushes the inkjet head. • This step should be performed while the cleaning unit cover remains closed. • Place the inkjet head in the bracket on the cleaning unit, using the two mounting screws. Make sure there are two rubber seals on the bracket. • Open Taps #2 and #4. • Turn on the pump for 30 to 60 seconds and release air bubbles from the filter. • Open Tap #3. Confidential
Mechanical Stage (Cont.) • Turn on the pump. • Allow the cleaning unit to operate for 2 to 5 minutes. • If some nozzles are not spraying, rub your finger over the orifice plate using recommended gloves. • If there are still some spraying problems, change the flushing pressure. • If there are still nozzle problems, perform the ultrasonic bath procedure. Confidential
Tap 3 Tap 4 Venting Screw Tap 2 Electrical Stage • The electrical stage checks the electrical function of the nozzles in the inkjet head. Confidential
Electrical Stage (Cont.) • The electrical stage checks the electrical function of the nozzles in the inkjet head. • Close tap #2. • Verify that the pump is off. • Close Tap #4 and open Tap #1. • Connect a flat cable to the cleaning unit and close the latches. • Allow the cleaning unit to operate for 2 to 5 minutes. • Turn on the pulse generator. • Tune the pulse generator to the highest frequency. Confidential
Electrical Stage (Cont.) • Allow the nozzles to spray for 15-30 seconds (check for missing nozzle spray). • Rotate the frequency selector three clicks to the right. • Slide a piece of paper in front of the inkjet head (check for missing nozzle spray ). • Turn on the pump for 5 seconds. • Turn on the pulse generator again. Confidential
Ultrasonic Bath • When encountering heavy clogged inkjet heads, it is recommended to use the Ultrasonic Bath. • Use only distilled water. Pipette Inkjet head Distilled water at room temperature Confidential
Static Washing Unit Confidential
