Control system for nozzle positioning motor

Details Control system for nozzle positioning motor Control system for nozzle positioning motor

B - Operations, Transporting

43

M

342/21, 120/4

B43M 5/04 (2006.01) B05B 12/00 (2006.01)

Patent

CA 2003147

A moistening arrangement for moistening the flap of an envelope includes a moistening device for moistening the flap of the envelope, a source of first signals that are a function of the the width of the flap, a motor coupled to provide relative movement between the nozzle and the flap, and a control arrangement responsive to the first signals for controlling the motor to vary the relative positions of the flap and nozzle in a direction for moistening the flap at determined positions thereof. The control arrangement comprises an arrangement responsive to the signals for determining the rate of change of the first signals, an arrangement responsive to the rate of change below a determined rate of change for controlling the motor to move in a servo mode, and and an arrangement responsive to the rate of change above the determined rate of change for controlling the motor to move in a torque mode.

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