Newport ESP300 Series - Page 10

Figure 5.23: Slow Speed Home (Origin) Switch Search............5-21
Figure 5.24: High/Low-Speed Home (Origin) Switch Search ...5-21
Figure 5.25: Home (Origin) Search From Opposite
Direction ...............................................................5-22
Figure 5.26: Encoder Quadrature Output .................................5-23
Figure 5.27: Optical Encoder Scale...........................................5-23
Figure 5.28: Optical Encoder Read Head .................................5-24
Figure 5.29: Single-Channel Optical Encoder Scale and
Read Head Assembly.............................................5-24
Figure 5.30: Two-Channel Optical Encoder Scale and
Read Head Assembly.........................................5-25
Figure 5.31: Stepper Motor Operation ......................................5-26
Figure 5.32: Four-Phase Stepper Motor ...................................5-27
Figure 5.33: Phase-Timing Diagram.........................................5-27
Figure 5.34: Energizing Two Phases Simultaneously................5-28
Figure 5.35: Timing Diagram, Half-Stepping Motor.................5-28
Figure 5.36: Energizing Two Phases with Different
Intensities ..........................................................5-28
Figure 5.37: Timing Diagram, Continuous Motion (Ideal) .......5-29
Figure 5.38: Timing Diagram, Mini-Stepping ...........................5-29
Figure 5.39: Single Phase Energization ....................................5-30
Figure 5.40: External Force Applied .........................................5-30
Figure 5.41: Unstable Point.......................................................5-30
Figure 5.42: Torque and Tooth Alignment ................................5-30
Figure 5.43: DC Motor ..............................................................5-32
Figure 5.44: Simple Stepper Motor Driver................................5-34
Figure 5.45: Current Build-up in Phase ....................................5-34
Figure 5.46: Effect of a Short ON Time on Current ..................5-34
Figure 5.47: Motor Pulse with High Voltage Chopper..............5-35
Figure 5.48: Dual H-Bridge Driver ...........................................5-36
Figure 5.49: DC Motor Voltage Amplifier.................................5-36
Figure 5.50: DC Motor Current Driver.....................................5-37
Figure 5.51: DC Motor Velocity Feedback Driver....................5-37
Figure 5.52: DC Motor Tachometer Gain and
Compensation....................................................5-38
Figure 7.1: Alphanumeric Hand-held Keypad.............................7-1
Figure B.1: Rear Power Line Panel Fuse Replacement ............. B-4
Figure C.1: RS-232C Connector pin-out .................................... C-7
Figure C.2: Connector, Pin-to-Pin RS-232C Interface Cable.... C-7
Figure C.3: Motor Interlock Connector (BNC) with dust cap ....C-8
Figure E.1: Removal of the Top Cover ....................................... E-2
Figure E.2: Interior of the unit explaining the connectors ......... E-3
Figure E.3: How to remove screws inside the unit for the
Front Panel .......................................................... E-4
Figure F.1: Configuration Logic................................................. F-2
x Preface