In drop-on-demand (DOD) inkjet printing in the pharmaceutical industry, ink residues on the nozzle plate cause improper jetting and nozzle clogging. To address this issue, a wiper module for the Ricoh Gen4 printhead was developed and optimized using an elastomeric blade and TPM/PPH model fluid. Through image analysis in ImageJ software, the effects of interference (0,5, 1,0 and 1,5 mm), attack angle (−10°, 0° and 10°), and wiping speed (40, 80 and 140 mm/s) were evaluated. The highest surface cleanliness is achieved with a combination of 1.0 mm interference, an attack angle of 0°, and a wiping speed of 40 mm/s.
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