1756SC-IF8U

 5 伺服控制、驱动及接口

    5.1 步进电机控制系统的组成

    步进电机的控制系统由可编程控制器、环行脉冲分配器和步进电机功率驱动器组成，其结构见图1。

    控制系统中PLC用来产生控制脉冲；通过PLC编程输出一定数量的方波脉冲，控制步进电机的转角进而控制伺服机构的进给量；同时通过编程控制脉冲频率——既伺服机构的进给速度；环行脉冲分配器将可编程控制器输出的控制脉冲按步进电机的通电顺序分配到相应的绕组。PLC控制的步进电机可以采用软件环行分配器，也可以采用如图1所示的硬件环行分配器。采用软环占用的PLC资源较多，特别是步进电机绕组相数M>4时，对于大型生产线应该予以充分考虑。采用硬件环行分配器，虽然硬件结构稍微复杂些，但可以节省占用PLC的I/O口点数，目前市场有多种**芯片可以选用。步进电机功率驱动器将PLC输出的控制脉冲放大到几十~上百伏特、几安~十几安的驱动能力。一般PLC的输出接口具有一定的驱动能力，而通常的晶体管直流输出接口的负载能力仅为十几~几十伏特、几十~几百毫安。但对于功率步进电机则要求几十~上百伏特、几安~十几安的驱动能力，因此应该采用驱动器对输出脉冲进行放大。PV Measurements Solar Photovoltaic Reference, PVM444


Siemens Power Supply 6ES7 407-0KR00-0AA0, 6ES7-407-0KR00-0AA0, SHIPSAMEDAY1630C


SWAGELOK H22-BN5459-20 Hastelloy 1/4"T, 3way Shipsameday W/2-3daysshipping ZF35


Inficon AG LI-9496 pressure gauge CF 2.75", 353-508, BPG400-SD, 354-491 1557A6


Inficon AG LI-9496 pressure gauge CF 2.75", 353-507, BPG400-SD, 354-491 1557A5


MKS INSTRUMENTS In Situ Diagnostic Access Valve IDA, IDA-T007, 3870-01987


DANAHER MOTION SERVO AMPLIFIER, HPAR-15840-601-4501B14


MKS INSTRUMENTS In Situ Diagnostic Access Valve IDA Tool16, IDA-T016, 1551P


MICROCHIP MCP23S17-E/SS, IO EXPANDER, 16BIT, 28SSOP, SHIPSAMEDAYR4


BRANSON/IPC Plasma Program Controller, PM906U-4


Mks Mass Flow Controller 1/2" VCR 300 SLM / HE / 1579A00132LR14V / VITON 120C2


SIEMENS 6SL3210-1KE22-6AP0 


Voltronics trimmer Variable capacitor .6-5pF, A4M5, SHIPSAMEDAY Y14


Mecos Traxler MPA3-50 & FDC240


MKS Baratron Pressure Transducer 1 Torr, 1/4" FVCR, 690A01TRC


PHOENIX CONTACT Motor Starter, 2732389, 27 32 3 89, IB L2 IP 500 MLR-4-6A, B17


20x PARKER Push-Lok Barbed Female JIC 37° Swivel 3/4" SST, 30682-12-12-C 1550D3


Swagelok Diaphragm Valve, 6LVV-MSM-ALD3T-2-P-CSV, 200C ALD 


Edwards PV40EKS Right Angle Valve KF-40, C414-04-000


ALLEN-BRADLEY AC DRIVE, 3-PHASE, 10.4kVA, 1336-B007-FOD-13


Eltrotec Sensor M8X68Mm Cyl Laser 10610212, LLS8/0.5Q 1600A7 


OMRON Smart Sensor Camera, ZFX-SC, SHIPSAMEDAY1227B1


Mks Mass Flow Controller 1/2" VCR 300 SLM / HE / 1579A00132LR14V / VITON 120CA


SilPac High Purity & Industrial  SP-RPXSP6-HPM0DA0


StripIR Infrared Heating 25" Lamp/Housing 5000W, 5306B-25-3500-00-00, 103390-008


SMC HIGH VACUUM VALVE 1/4" FVCR, XVD2-02VF-X507, XVD2-02VF, Shipsameday1181P1


NTI XTENDEX Remote and Local Unit,  ST-C5KVM-600M


SMC Pneumatic Rodless Cylinder MY2H40G-660L-XB11


PANASONIC Color CCD Camera GP-KR222


ASSY FESTO 18980, 18968, 18969, 18671, 174483, 18738, 18652, 18781,18639, 159432


General Scanning PWA E11-13209-7 Rev D & GSI 000-3008528


CAMCO Rotary Indexer 80RDM8H16-330, D-67119


SMC Angle Valve High Vacuum NW63, XLA-63D-A93LA-XAQ3-A-01N


Brooks Mass Flow Controller GF080CXXC, GF080C-100766


RENISHAW incremental encoder system, S-9SRH-0247


Allan Aircraft AA67010-16KA (AA67010) & AA67029-16KA (AA67029) W30


18X Amphenol Circular Elbow MIL Connector 31461-E2121R13041S0055 


MTS TempsonicsGH-Series Linear Position Sensor, GHS0060UD602V0


MIZAR GPC CPU MODULE 9248044, MZ8115-E-27-N, GPCROM.S, 79K33557-1


GREIFER LIGHT-SPRING ULS-80, ULS80, 15130002, SHIPSAMEDAY1542Z10


Allen Bradley LOGIX 5335E PRO 1769-L35E, 1769-PA4, 1769-SDN, 1769-ECR, 1784-CF64


SAINT-GOBAIN PERFORMANCE **STIC 730002109


Metrobility Gig-E Services Line expansion module, R851-1S, SHIPSAMEDAY X44A


Mks Mass Flow Controller 1/2" VCR 300 SLM / HE / 1579A00132LR14V / VITON 134C8


QUANTUM QT60161B-ASG, IC SM TOUCH SENSOR 16 CHANWAFFLE80 S86


Linear IC OPAMP GP 7.2MHZ RRO 8SO, LT1677IS8PBF, SHIPSAMEDAY Q51


Fisher Controls Model TL102, Flow Controller 5903853, Shipsameday 1615A


PARKER Push-Lok Barbed Female JIC 37° Swivel 3/4" SST, 30682-12-12-C 1550D2