Epson SQ-B50/2550 Technical Manual page 66

REV.-A
Figure 2·47. Block Diagram of Carriage Motor Control Circuit 2-44
Figure 2-48. PLL control(at normal speed) 2·46
Figure 2-49. PLL control(at accelerated speed) 2·46
Figure 2-50. PLL control(at reduced speed) 2·46
Figure 2-51. PRC(Accelerated speed) 2-47
Figure 2-52. Acceleration by Full Energizing 2-48
Figure 2-53. Carriage Motor Drive Circuit 2-50
Figure 2-54. Carriage Motor Current Wave Forms 2-50
Figure 2-55. Encoder Output Wave Form 2-51
Figure 2-56. Control Positions 2-51
Figure 2·57. PTS Signal Wave Form 2-52
Figure 2-58. Head Construction 2-54
Figure 2-59. Nozzle Construction 2·54
Figure 2-60. Printing Principle(1) 2-55
Figure 2-61. Printing Principle(2) 2-55
Figure 2-62. Printing Principle(3) 2-55
Figure 2-63. Print Head Control Circuit Block Diagram 2-56
Figure 2-64. Charge and Discharge Circuit 2·57
Figure 2·65. Charge and Discharge Pulse Timing 2-58
Figure 2·66. Discharging Wave Form 2-58
Figure 2-67. Charging Wave Form 2-58
Figure 2-68. Vh Supply Main Circuit 2-59
Figure 2-69. 494 Switching Wave Form 2·59
Figure 2·70. Constant Voltage Control Circuit 2-60
Figure 2·71. Relationship Between Ink Temperature
and Drive Voltage 2·60
Figure 2-72. Current Limit Circuit 2·61
Figure 2-73. Over-voltage Limit Circuit 2-61
Figure 2-74. Outlined Ink Mechanism System 2-62
Figure 2·75. P Motor Power Transmission 2-63
Figure 2·76. Pump Motor Control
and Drive Circuit Block Diagram 2·64
Figure 2-77. Pump movement 2·64
Figure 2-78. Pump Construction 2·65
Figure 2-79. Cap Movement 2-65
Figure 2-80. Cleaner Movement 2-66
Figure 2-81. Valve Movement 2-67
Figure 2-82. Valve Solenoid Driving Wave form 2-67
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