Optional Equipments - Epson LQ-2550 Technical Manual

REV.-A
2.1.2.4 Paper Feed Mechanism
This mechanism consists of the pF motor, paper feed mechanism, paper release mechanism and paper
loading lever open/close mechanism.
Paper feed mechanism
The PF motor drives the platen or tractor via the PF transmission gear, and feeds the paper. If the paper
runs out, the PE sensor detects it (Refer to Figures 2-14 and 2-1 5.).
Table 2-17 lists the specifications of the paper feed mechanism.
Motor
PF motor;
Refer to Table 2-18.
Item
Type
Drive Voltage
Hold Voltage
Coil Resistance
Driving Frequency
Driving Method
Item
Type
Rated Voltage
Push tractor feeding and friction feeding are described below.
The paper feeding methods consist of push tractor feeding (for continuous paper) and friction feeding
(for cut sheet paper). (Refer to Table 2-20.)
Paper Release Mechanism State
Paper
Push tractor
Paper feeding method
Optional Equipment
Table 2-17. Paper Feed Mechanism Specifications
Driving method
Gear
transmission
Table 2-18. PF Motor Specifications
Description
Four-phase 48-pole PM type stepper
motor
5 VDC
144 PPS
Constant voltage drive
Table 2-19. PE Sensor Specifications
Description
I
Mechanical switch
Table 2-20. Paper Feeding Method and Paper
Cut sheet
Invalid
Standard
Paper feeding per step
l/360 "/step
2-2 phase excitation
I
Friction Feeding
Cut sheet feeder"
2 - 1 6
Sensor
PE sensor;
Refer to Table 2-19.
Remarks
Remarks
Tractor Feeding
Continuous
Valid
Push &
I
I
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