Abstract
This paper deals with a newly developed pin electrodes array supporting mechanism for the high speed electrostatic printer using a dielectric drum. A gap between the dielectric drum and the pin array shoud be maintained 30 μm at a printing speed of 80 cm/s in order to achieve high quality printing. The supporting mechanism has two guiderollers on both sides of the pin array and has two springs which push these rollers to the dielectric drum. The main conclusions are as follows. The resonance frequency of the supporting mechanism which is calculated with the spring constants of the guiderollers and the mass of supporting bed must be designed at much higer frequency than the dielectric drum rotating frequency. Moreover the fluctuation of the driving torque of the dielectric drum must be very small, because this fluctuation induces a secondary critical speed in the drum shaft driving.
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