兩相混合式步進(jìn)電機(jī)步距角一般為3.6°、1.8°，五相混合式步進(jìn)電機(jī)步距角一般為0.72°、0.36°。也有一些高性能的步進(jìn)電機(jī)步距角更小。如四通公司生產(chǎn)的一種用于慢走絲機(jī)床的步進(jìn)電機(jī)，其步距角為0.09°；德國百格拉公司（BERGER LAHR）生產(chǎn)的三相混合式步進(jìn)電機(jī)其步距角可通過撥碼開關(guān)設(shè)置為1.8°、0.9°、0.72°、0.36°、0.18°、0.09°、0.072°、0.036°，兼容了兩相和五相混合式步進(jìn)電機(jī)的步距角。

? ?交流伺服電機(jī)的控制精度由電機(jī)軸后端的旋轉(zhuǎn)編碼器保證。以松下全數(shù)字式交流伺服電機(jī)為例，對于帶標(biāo)準(zhǔn)2500線編碼器的電機(jī)而言，由于驅(qū)動(dòng)器內(nèi)部采用了四倍頻技術(shù)，其脈沖當(dāng)量為360°/10000=0.036°。對于帶17位編碼器的電機(jī)而言，驅(qū)動(dòng)器每接收217=131072個(gè)脈沖電機(jī)轉(zhuǎn)一圈，即其脈沖當(dāng)量為360°/131072=9.89秒。是步距角為1.8°的步進(jìn)電機(jī)的脈沖當(dāng)量的1/655。

? ?2.2低頻特性不同?

? ?步進(jìn)電機(jī)在低速時(shí)易出現(xiàn)低頻振動(dòng)現(xiàn)象。振動(dòng)頻率與負(fù)載情況和驅(qū)動(dòng)器性能有關(guān)，一般認(rèn)為振動(dòng)頻率為電機(jī)空載起跳頻率的一半。這種由步進(jìn)電機(jī)的工作原理所決定的低頻振動(dòng)現(xiàn)象對于機(jī)器的正常運(yùn)轉(zhuǎn)非常不利。當(dāng)步進(jìn)電機(jī)工作在低速時(shí)，一般應(yīng)采用阻尼技術(shù)來克服低頻振動(dòng)現(xiàn)象，比如在電機(jī)上加阻尼器，或驅(qū)動(dòng)器上采用細(xì)分技術(shù)等。

? ?交流伺服電機(jī)運(yùn)轉(zhuǎn)非常平穩(wěn)，即使在低速時(shí)也不會出現(xiàn)振動(dòng)現(xiàn)象。交流伺服系統(tǒng)具有共振抑制功能，可涵蓋機(jī)械的剛性不足，并且系統(tǒng)內(nèi)部具有頻率解析機(jī)能（FFT），可檢測出機(jī)械的共振點(diǎn)，便于系統(tǒng)調(diào)整。

Allen Bradley 800T-J5KE7B 3 Position Selector Switch Black Knob Spring Return

PHD 17503-2-06 Proximity Switch Sensor?

Festo SMTO-4-PS-S-LED?-24B SMT0 Proximity Switch Sensor

Sunx Beam Sensor NX-51T 51 B0?

Allen Bradley Z-16065 Operator Head For Limit Switch 802T?

Thermal Switch 06EA 502 283 fap factory parts?

KELE DC power supply DCP-1.5-W wentech 1.5w 24v 24vdc

Balluff BES-517-1603-QN?-S-5 Inductive Proximity Sensor Switch?

Vickers 1 922863 Seal Kit bosch Cylinder piston gasket o-ring oring?

250330RXRX Panel Meter 0-300 A-C AC Volts GE General Electric?

Ideal 30-1033J Push-In Wire Connector Qty.250?

IFM Efector E11627 Splitter 1Pole M12 Female to Male?

ASCO Red Hat 302274 Valve Rebuild Kit?

Hydac Hydrafil 01262980 Hydraulic Filter Element oil RHR240G05B?

Allen Bradley 800MR-B2D1 small round push button B2 XD1

Ohmite lug resistor L225J7K5 225w 7500 ohm 225 watt?

Smith MCRV-52-SB Cam Bearing emc-52sb follower

Banner 2SBL1 17669 Photoelectric Scanner Block?

Watlow Armored Thermocouple 7815995 0742 SPA.0230.2

Killark GECLT-2 3/4" explosion proof Outlet body hazard

Conta Clip OKI8/24-G Opto-Coupler Module AP1/TS 5957.3?

Modicon AS-BDEP-218 TSX Discrete Input Card Module?

Allen Bradley 800F-1PP Plastic Enclosure starter push button 1 hole gray?

Marsh 0-3000psi 3000 psi Oil Filled 21000kpa Pressure gauge J7278P 63mm 1/4" npt

Spang 83469 E7524 P02101818-001 PCB module Power E7524-0?

Glass Metering Tube R8M25-2 R8M-25-2 S925J151WAA?

Allen Bradley 1492-GH070 Circuit Breaker 7A Ser.B?

Browning B16008M30 HPT Gearbelt Timing Belt Emerson Powergrip?

Bradley S05-091P Eyewash Yoke Assembly?

Buss FWP 80 Semiconductor Fuse 80A 700V Bussman Cooper 80B FWP80A FWP80B?

Donaldson P167832 Hydraulic Filter?

Mettler Toledo 00047081 Scale Support Pan w/Spring 47081 PE360

Kele SCS1.5A Current Operated Non-Adjustable Switch?

Leviton Infotap Category 5 Patch Block 12 port Panel?

Opto 22 OAC5Q Output Module?

Scientific Solution 811973 40 Position Terminal Block 938532 Phoenix Contact

Allen Bradley, 193-BSB60, Overload Relay Motor Protector 4.0-6.0A?

GE, 50-250240NGNG1, Panel Meter 0-20 AC Amperes?

Idec, RTE-B1AF20, Multi Electronic Timer 10A?

Rosemount 00079-0325-0002 Connection Head Temperature Sensor explosion Proof

Royal Electric T655D-TP-12 Axial Cooling Fan 200VAC 43/40W?

Euchner Safety Switch NZ1VZ-538E interlock

ARGO HYTOS V3.0516-05 Hydraulic Filter

Festo LFMAP-D-MAXI 162676 Micro filter cartridge for LFMA, degree 0.01

Norgren L74M-6AP-QPN Pneumatic Air Line Lubricator- MF L74M-6

Parker 932670Q 10Q Hydraulic Oil Fluid Filter FP 10-539 P 039093-7U7V

Parker Filtration 925779 10B Hydraulic Filter NIB P163903 FP 10-3632

Parker FTAE2B20Q Filter RxP2CK84-S8-25M?GV FTA-220QELEMENT?VIT HF32H20NQ

R72G2ATRCG Regulator D05 1/4" w/ Gauge- Norgren

Siemens FCK206 Fuse Clip Kit 30/60Amps 600/240V 3Poles MCS ITE?

Allen Bradley, 1492-CB1H400, Circuit Breaker 40a 40 amp Single Pole?

Breco, AT5/660, Brecoflex Timing Belt?

Decco, 9-12M-056, Solenoid Valve Coil 115V/60Hz?

Decco, 9-155M, Solenoid Valve Coil 115V 60Hz Detroit?

Fabco-Air B-221-X Pancake Line Cylinder?

Omron, D5B-1013, Limit Switch Sensor?

Opto 22, ODC5Q, I/O Module?

Rite-Hite, 57349, 4-06-8012 Stepdown Transformer MCI?

Ametek Thermometer 20-200f 142024 us gauge fahrenheit f

Omron S3200-COCF62F-2?562

Milacron Cimform Grinding Wheel Pink 12A60-K6-VFM 5X1-1/2X1-1/4 5" 1.5" 1.25" NE

Ingersoll IMC SNH-34-001 IN2040 5820252 Carbide Insert Cutting Tool 746443738

Ingersoll Carbide Insert LNE324-0A2 IN6510 5803753 0700861097-MPL cutting?

Allen Bradley 800MR-JX9B Oiltight Selector Switch Ser.A?

Sentrol 2302A-L 2302 Curtain Door Magnetic Contactor magnet?

Hycon Hydac 02059099 Hydraulic Fluid Oil Filter RxH10AP28-S5-12?MGB P170615 NF05

Banner, PBT2, 16395, Multi-Beam Photoelectric Sensor?

Banner S18SP6DQ EZ-Beam Photoelectric Sensor?

Allen Bradley 1492-CB1G050 manual Motor Controller 5amp 5a Circuit Breaker?

Allen Bradley 1492-CB1G040 manual Motor Controller 4amp 4a Circuit Breaker?

Allen Bradley 1492-CB1G030 manual Motor Controller 3amp 3a Circuit Breaker?

Allen Bradley 1492-CB1G020 Manual Motor Controller 2amp 2a Circuit Breaker?

Allen Bradley 1492-CB1G010 manual Motor Controller 1amp 1a Circuit Breaker?

Furnas 42BF15AF Definite Purpose Controller 2Poles?

A FCI HYLUG YA25L4BOX 1/0 AWG CU Wire 3/8 stud 518350 crimp Lug connector hylink

SMC VZM450-01-30B Mechanical Valve Black Mushroom Head Push Button Pneumatic

Festo DSNU-12-25P-A Pneumatic Air Cylinder?

PepperL + Fuchs 454358 Logic Card Honeywell?

Numatics AKF02 Auto Drain Assembly

Allen Bradley 800T-Q24 Pilot Light 24V Ser.T No Lens?

Sandvik Carbide Insert S-SNGU 650-X1 P12C

IFM Efector II5746 IIB3015-BPKG/US?-100-DPS Inductive Proximity Switch Sensor?

Banner T18AW3RQ1 opposed mode sensor right angle?

Balluff BMF-307K-PS-C-2?-PU-05 Magnetic Field Sensor?

Opto 22 IDC5Q I/O Module?

Schlage F40 AVA 716 Privacy Lever Lock Aged Bronze Door Bed Bath?

Telemecanique LR2 K0301 Thermal Overload Relay 0.11-0.16A?

Telemecanique LR2K0316 Thermal Overload Relay .11-.16a LR2K 0301 Motor?

Allen Bradley 595-AB Auxiliary Contact 1NO 1NC Size 0-4?

Banner OPBT2QDH Omni-Beam Power Block 27189?

Cliftronics R1900R01029 Rotary Solenoid 3144593?

Idec AOD320NB TWTD Mushroom Pushbutton Button Black 80Y3T1?

Omron H3DJ Timer Series B 100/110/120VAC 50/60Hz?

Parker Pneumatic 06R211LC 3/8" Regulator .375 250psi?

Rexroth 901-HN1TF Valve Manifold Base P68425-01?

SMC ECQ2B32-10D Compact Pneumatic Air Cylinder Actuator?

Ferraz Shawmut 66582 3 Pole 600V Copper/Glass Pwr Distribution Block 175A

Datel DM3104 Digital Panel Meter Totalizer Voltmeter Meter?

Farnell N-O2/M 170-838 Reed Proximity Switch?

Century Diaphragm 27-3 Teflon 3"

Siemens 8WD4 408-0AA Stack Light Beacon Electro-matic EMSL318XXXX4 white clear

Advance REL-2S86 High Output Light Lamp Ballast REL2S8635M T8 fluorescent 120v

Reliance Electric 701819-9AC Silicon Power Cube Rectifier?

Martin 35BTB22 1210 martinsprocket sprocket

A-Tech Instruments 3010AM fitting?

Astec 73-385-013 ACV 24N1.2 24v 1.2a power supply 24vdc

Banner BM.752PMA.25 17246 Fiber Optic Cable Wire Sensor?

Henry R12 R22 R502 Refrigerant Globe Valve 5163 9835 500psig Shut Off 3/8"?

Sola, E050E, EGS Hevi-Duty Transformer .050KVA?

Telemecanique, LRD01, 034671, Overload Relay Motor Protector 0.1-0.16A?

Allen Bradley 1492-GH100 Circuit Breaker 10 Amp 10a Ser.B?

Turck PKG 6Z-9 Cable w/Female Connector U0070-46 pico fast snap on?

Guard Master Sprite Safety Switch EN1088 440H-S34003 SPR-2?

GE CR104PXG48 Light Module Full Voltage White Lens CR104PLT18W Indicator?

Buss Cooper NOS-5 5a 5 amp One-Time Fuse Fuses 600V Box of 10?

Edwards M500XF Fault Isolator Module?

Wika 213.53 2.5" Liquid Filled Gauge -30INHG/15psi 1/4"NPT LM 4269986-0002?

Wika 310797 Type 213.40 2.5 Pressure Gauge 2000psi 1/4"NPT LM?

Ingersoll Carbide SNH-34-001 IN2040 5820252 0822833058

National Instruments 763061-01 GPID cable 1.1m wire X2

Master Pneumatic MRS100-6 Filter Regulator Silencer Reclassifier

Banner RLM8 Maxi-Beam Logic Module 25575?

Brad Harrison 41610 Mini-Change Cordset 6P Male 12' 16-6 PVC Cord Woodhead?

Gould Shawmut 63153 Power Distribution Block Wiring Wire Ferraz?

Gould Shawmut Ferraz 20300 Fuse Block Holder 250V 30A 6 six?

Idec APD1126DN-W Pilot Light White?

Watlow B02601AP-3001 Band Heater 240V 400W Type M

Mac 35A-BAE-DDAJ-1K?J Solenoid Valve 24VDC 5.4W?

Marsh Thermometer L31208 50/550F&C 1/2N Temperature Probe?

Type E31 TL-2-220 Gear head Reducer AG2002 24772336 E 31

Wika 9318240 Pressure Gauge 213.40 2.5" 1000psi 1/4"NPT CBM?

Schneider Automation AS-990NAD21130 Modbus + Drop Cable 6M Modicon PLC Wire?

SMC, IS1000M-40-X201?, Pressure Switch Sensor

Toshiba MG75Q1BK1 Encapsulation Power Module Channel SCR?

Allen Bradley, 1492-CB1H400, Circuit Breaker?

Banner, RPBA-1, 25696, Maxi-Beam Power Block 120VAC?

Cutler-Hammer, T350K, Terminal Assembly Lug 250-500MCM CU?

Dixon Andrews 200-DD-AL Pipe Aluminum Spool Coupler 2" Hose Connector Female?

Mac, PME-592DABA, Solenoid Valve 24VDC?

Micro Switch, BZE-5100, Limit Switch Honeywell Yamatake?

Omron, D5B-1013, Mechanical Touch Switch?

Parker, LO74870000, REED Switch Assembly Cylinder Position Sensor?

Phoenix Contact, SUBCON 25/F-SH, Connector?

STI, STI-6545-R, Mini-Stopper II without Horn Fire Alarm Cover Mount Plastic

Square D 8501 C07V20 Power Relay 30A 300VAC Coil 120V Contactor?

Dynamco D20S0K00 Valve?

Balluff, BKS-S32M-00, Connector 423-2-99-5672-1?9-08 4996367455 Plug 8 pin

ABB, TA25 DU 3.1, Shamrock Controls TR2-D09310 Thermal Overload Relay

Allen Bradley Devicenet 1485P-P1E4-R5 KwikLink Connector?

Allen Bradley, 0A86P, Operating Coil Type B & BX 120V?

Siemens, 6GK1 901 1FC00 0AA0, Simatic NET Fast Connect RJ45 Ethernet Plug Din

Asco, 10700133, Redhat 1/8" SPT 3-Way Solenoid Valve 24VDC?

Asco, 8353C33, Red-Hat Solenoid Valve?

Fireye, MED2, MicroM Daughter Board W/Display Output?

Fuji Electric, AR30V2R-22R, Push button Switch Emergency Red Mushroom Stop?

SMC, CD85N20-80C-B, Pneumatic Air Cylinder?

Efector IM5078 IMC4020BCPKG inductive proximity switch

Efector IFM MK5013 MKP3000 cylinder proximity switch

Allen Bradley, 1492-N23, Terminal Block Wiring Heavy Duty End Anchor 10pcs/Box

Telemecanique Schneider ABR1S102B Relay Module 24VDC?

Fuji, AH22 ZRH, Command Switch AH22-Z H RED Light Button Pilot push Lamp?

Fuji AH22 ZGH Command Switch AH22-Z H Green Light Button Pilot push Lamp?

Telemecanique, LRD05, Overload Relay Motor Protector 0.63-1A?

Square D 8910 DPA 13 V02 Contactor 3Pole 600V 8910DPA13V02 2CF89?

PD Power Drive AK84 Single Groove Cast Iron Pulley AK84-5/8?

Speedaire 4ZL75 Mist Lubricator 3/8" 150psig-Max air pneumatic oiler .375?

Square D EK3002 Electrical Interlock for 30Amp Switch 2NO 2NC Contact D02 Series

Maeda Koki Water Signal Oil MKT 25-2T MKT25?

SFW JARCR-XFL01 PCB Brake Release UP20 XRC Controller Motoman

Arrow Pneumatics 9009 Pressure Regulator W/Gage 3/4" NPT 220 SCFM .75" R37

Hinode Electric H-A600S3 Supply Current Detector HA600S3 Motoman?

Kepner 406B-1 Hydraulic Brass Check Valve?

Allen Bradley 440N-ZPREC SensaGuard Non-contact Actuator?

Banner PBT LR41887 Power Block 16393?

Allen Bradley 700-F040A1 Control Relay?

Fanuc 2402 Cable Hartel HA7555 Wire Connector 4 pin?

Davis RU813714 POD-197-000 current/voltage input module

Allen Bradley 195-FA40 Contact Block Ser.A?

Numatics 212-135 Pneumatic Air Pushbutton?

PILZ 311050 SafetyBUS p 114542 Connector?

Raychem RVC-1V (B5) 600V Motor Connection Kit?

Raychem RVC-2V (B5) Motor Connection Kit 600V?

Test Product Inc. GM-48800-004 Board Shunt?

Allen Bradley 1492-WG10 Terminal Blocks Lot of 8?

Siemens 8WD42001AE LED Pilot Light 50mm Clear 8WD4 200-1AE?

Allen Bradley 889D-F4AC-20 QD Cordset 4Pin 20M?

Siemens 3RU1116-1CB0 Overload Relay 1.8-2.5Amp?

Balluff BES-517-1603-QN?-S-5 Inductive Proximity Sensor Switch ?no plastic

PowerVolt power supply 24vdc 1.2amps BVA-24AS1.2?

PowerVolt power supply 12vdc 1.2amps BVA-12AS1.7?

Phd, 17502-2-06, Proximity Switch Sensor Cylinder Position?

Turck, BL67-B-2M12, 6827186, Base Module?