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伺服系统由伺服电机、伺服控制器和反馈装置组成。伺服电机的工作原理可以简单概括为：输入控制信号→伺服控制器→伺服电机→输出运动。伺服系统由伺服电机、伺服控制器和反馈装置组成。伺服电机电动机电动机负责产生机械输出力和扭矩，编码器则用于测量电机的位置和转速，并将测量结果反馈给伺服控制器。通过不断比较编码器的测量值和控制信号，伺服控制器可以实时调整电机的输出，以保持所需的位置和速度。

Allen Bradley 700-N400A1 Ser C CONTROL RELAY 4 N.O. 110/120V 50/60Hz

Allen Bradley 700-N800A2 Ser B 700-N INDUSTRIAL CONTROL RELAY 220/240V 50/60Hz

Allen Bradley 700-N801A1 Ser B Type N Control Relay 115-120V 50/60Hz New In Box

Allen Bradley 700-PK800B11 Ser B AC Relay 10A 600V 120V Coil Used

Allen Bradley 700-PSAA1 Ser A Timing Relay W/ 700-P400A1 Ser A Relay

Allen Bradley 700-R600A1 Ser C Contactor With 77AC86 Coil 110V 115-120V 50/60Hz

Allen Bradley 700-RT00N000AJ Ser A Solid State Timer

Allen Bradley 702BOD91 Ser. K Contactor 27A 600VAC 71A86 Coill 110/120V 50/60Cy

Allen Bradley 77D155 115-125VDC Coil New Old Stock

Allen Bradley 800E-X01 Ser B Contact Cartridge New No Box (Lot of 17) See Pics

Allen Bradley 800H-16HRA2KB6AA Ser F Illuminated Selector Switches Used Lot of 2

Allen Bradley 800H-DK1 Ser B Green Mushroom Pushbutton 800T-XA Ser D Contact NOS

Allen Bradley 800H-NX357 Ser B Pushbutton Station 800H-WK4 & 800H-WK6 Ser B Used

Allen Bradley 800MR-24JX5K Ser D Selector Switch Operator New No Box See Pics

Allen Bradley 800MR-24JX5K Ser D Selector Switch Operators 24V Used

Allen Bradley 800MR-D6 Ser A Red Pushbuttons & 800M-XAK Ser A Contact Block (10)

Allen Bradley 800MR-JA2BLA Ser A 800MR-JX2B Selector Switches No Knobs Lot of 2

Allen Bradley 800MS-X0 Ser A Pushbuttons W/ 800M-XD1 Ser B Used (Lot of 13)

Allen Bradley 800MS-XOB Ser C Small Push Button Unit 2NO 2NC New

Allen Bradley 800P-1F2ZBS Ser C 600V Max Palm Push Button W/ (2) 800P-XA Blocks

Allen Bradley 800P-1S1RBS Ser B Palm Operated Pushbutton New Old Stock

Allen Bradley 800T-16JG20KB7AA Ser U 3 Pos. Selector Switch 120VAC (2) 800T-XA/D

Allen Bradley 800T-H4808B Ser T Keyed Selector Switch Spring Return 2 Position

Allen Bradley 800T-J4A Ser T Selector Switch 800T-XA Ser D Contact Block No Knob

Allen Bradley 800T-QAH2GG1 Ser U 30mm Momentary Push Button New

Allen Bradley 801-ASB1-5 Limit Switch 600V AC-DC New Old Stock

Allen Bradley 801-ASC2-1 Limit Switch 600V AC/DC Used With

Allen Bradley 801-CMC2-1 Limit Switch 600V AC/DC New Old Stock

Allen Bradley 802G-GP Ser H Gravity Return Limit Switch New Old Stock (No Head)

Allen Bradley 802M-AX Ser C Operating Heads New No Box (Lot of 4) See All Pics

Allen Bradley 802MC-AY16 Ser D Limit Switch 802MC-XY16 Ser B Body 802MC-AX Ser D

Allen Bradley 802PR-LAAH1 Ser C PROXIMITY Switch 132V AC MAX 0.5 AMP MAX

Allen Bradley 802PR-LAAM1-08 Ser C PROXIMITY SENSOR

Allen Bradley 802PR-LBAK1 Ser E Self-Contained Proximity Switch New Old Stock

Allen Bradley 802T-AMP Ser F Oiltight Limit Switch New Old Stock

Allen Bradley 803D2X Ser A Rotary Limit Switch 600V AC DC Used With

Allen Bradley 810-A18A Ser A Magnetic Overload Relay 120A New

Allen Bradley 810-A28C Ser B Inverse Time Relay New No Box See All Pictures

Allen Bradley 813S-V0B Ser B SOLID-STATE LINE VOLTAGE MONITOR RELAY 480V 60HZ

Allen Bradley 813S-VOH Ser B Line Voltage Monitor Relay 208V 60Hz New Old Stock

Allen Bradley 815-BOV49 Ser K Overload Relay Panel (2) New (4) Used (Lot of 6)

Allen Bradley 815-C0V4 Ser K OVERLOAD RELAY 1POLE 600VA

Allen Bradley 815-E0V16 Ser K Overload Relay Panel 600V Used With

Allen Bradley 815-EOV16 Ser K Overload Relays Used With  

Allen Bradley 816-BOV15 Ser K Overload Relay Panel Used (Not Complete) Lot of 7

Allen Bradley 836-A101X1 Ser A Pressure Switch New Old Stock See All Pictures

Allen Bradley 836-AH23-NKCHS-12 5HP 115VAC 1HP 230VAC New Old Stock

Allen Bradley 836-C4A Ser A Pressure Control 30" VAC -45PSI 1-12PSI W/

Allen Bradley 836-L22-NKCH12N & 836H23-BLKS-12N Pressure Controls Used

Allen Bradley 836T-N13 Ser A Pressure Control Locking Cap New (Lot of 7)

Allen Bradley 836T-N2 Ser A 4-Circuit Contact Block New Old Stock See All Pics

Allen Bradley 836T-T252JX21X9 Ser A Pressure Control Used With

Allen Bradley 837AF11-PKCS Temperature Control Used With  See All Pics

Allen Bradley 849Z0D321B Pneumatic Timer 21A237 Coil 110V 60Cy Used W/

Allen Bradley 852S-NSC Ser G Solid State Timer Timing Range 1-60 Seconds NEW

Allen Bradley 852-ZOT288 Ser A Timing Relay New Old Stock See All Pictures

Allen Bradley 854KC-NPTB24Y4Y5Y6 Ser A Tower Light Stack Assembly 24V AC/DC NEW

Allen Bradley 855E-LL24A Ser A LED Lamp Amber 24V New (Lot of 3 Lamps)

Allen Bradley 855TP-B10Y6 Ser C Tower Light Stack Assembly 120V NEW

Allen Bradley 871TM-DX09-D4 Ser A Proximity Sensors 10-30VDC 200mA (Lot of 5)

Allen Bradley 95526901 CONTROL CARD 10MB HARD DISK T50A 5061-2826

Allen Bradley Cable Operated Fusible Disconnect 40023-437-02 40021-558-02 & More

Allen Bradley GB47G5 RC32GF4R7J Resistors 1Watt 4.7Ohms 5% Total New Lot of 425

Allen Bradley GSU2-2X Ser A 600V AC-DC Unit Used With  See All Pictures

Allen Bradley Idec Potter & Brumfield Dayton & More Relays & Relay Sockets 51pc

Allen Bradley IZUMI Telemecanique WEG Pushbuttons Switches & Contact Blocks 45

Allen Bradley M0008110 123239 Rev 18 M003222677 133769 Rev 01 Circuit Board Used

Allen Bradley M003331160 102902 Rev 25 Motherboard New Old Stock See All Picture

Allen Bradley Micro Switch 242PC15M Pressure Sensor New Old Stock See All Pics

Allen Bradley Photoswitch 8-302 Relays DC18V Coils Used With  

Allen Bradley Photoswitch 8-333 Relay 8-Pin New Old Stock See All Pictures

Allen Bradley S50280-002 Rev A PCB Brake Board Assembly New Old Stock See Pics

Allen Bradley SP-170131 Field Pulse Kit New Old Stock See All Pictures

Allen Bradley SP-173169 PCB Board New Old Stock See All Pictures

Allen Bradley SP-173172 Ser B PCB Power Board Kit New Old Stock See All Pictures

Allen Bradley Type 849 Style ABXX Time Delay Relay 21A86 Coil 110/120V 50/60Cy

Allenair VDS-1/4 AAS-120/60 Solenoid Valve W/ (2) V3NCA150 Coils 120V 60Hz New

Allen-Bradley 801-AS021 Ser A Limit Switch 600V AC-DC Max New Old Stock

Allied Control MHJX-4022 Relays 26VDC 250Ohms New Old Stock (Lot of 6)

Allied Controls 5945-465-9721 B0-13D 50VDC Relays DSA900-74-M-F058 (Lot of 5)

Allied Controls SKHX-625 G-243879-3 Relay Used With  See All Pictures

Alpha (Lot of 96 Fittings) Elbows, Tees, 4 Ways, Unions New See All Pics

Alpha Dot Cypher-Jet 110V With 110ML/ABK/1 Black Alcohol Ink And Sensor USED

Alpha Getriebebau Type LP 090-M01-10-111-000 Gearbox Ratio 10:1 Used W/

AMBITECH SS-4A-10RJ Electronic Motor Control 460V 10HP 3PH Used With

AMCI HTT-20-1A Resolver Transducer Used With  Fast Free

AMCI HTT-20-1B Resolver Transducer Used With  Fast Free

AMCI iPLC-1-2-3 Programmable Controller 115VAC Used With