6ES7953-8LL20-0AA0

6ES7953-8LL20-0AA0关键技术之主轴和进给伺服驱动

主轴的作用是带动刀(磨)具(钻削/铣削/磨削)或工件(车削)按给定速度旋转，并传递切削加工所需的功率和扭矩，使刀(磨)具在工件上实现材料去除。数控机床主轴的发展过程中出现了非调速的交流电动机经主轴箱传动的机械式主轴、电动机与主轴一体化的电主轴、高速电主轴、高刚性大扭矩高速电主轴和智能式主轴等。

机床进给轴的伺服驱动方式从步进电机、电液比例伺服、晶闸管变流和PWM控制的直流电动机伺服等形式，发展到现在成为主流的矢量控制交流电动机伺服、双电机重心驱动、直线电动机/力矩电动机直接驱动等形式，而且多采用带有位置环、速度环、电流环和“前馈＋滤波”的全闭环控制，为各坐标轴进给提供高速度、高动态响应的运动控制。此外，伺服控制模式从模拟量控制，经过“模拟量＋数字量”混合控制模式，发展为全数字式现场工业总线控制模式，如串行实时通信协议总线、实时以太网控制自动化技术总线、过程现场总线等。

6ES7953-8LL20-0AA0  

NetApp FAS270 Controller Module Filer Head

Netapp X515A-R5 AC 855W Power Supply FAS2050

FAS980 NetApp Filer Head Network Appliance 

90 Day Warranty 2x QLA2352 / 4x QLA2342 / 2x PRO/1000MT

NetApp NetCache C3300 6 X 144GB 10K FC 

NetApp FAS2050 Controller NetApp X3248A-R5

NetApp 111-00042 JNI IBP Dual 2Gb PCI Card 

NetApp Network Appliance F840 Filer Unit System NetApp

NetApp Disk Shelf Storage Array NAS FC DS14 14x 36GB

NetApp X3945-R5 Motherboard No Memory FAS3020 ,R5 New

NetApp X235 Sp235 108-00044 DK32DJ-72FC 10K 73GB

NetApp Network Appliance R150 Storage Disk

12x 250GB HDD Total of 2.7-TeraBytes Storage

NETWORK APPLIANCE NETAPP F820 FILER HEAD UNIT

Expedited shipping available

NetApp F825 Filer Head Unit

NetApp X262B-R5 250GB Disk Drive New

Hus103073FLF210 73gb 10K 17R651 NetApp sp-272 x272

NetApp F820 F880 NVRAM 128MB PCI-X Card 110-02091 X3135

One-day shipping available

NetApp R150 Network Appliance R150 NearStore System

NetApp 110-01803 X3760B F760 Motherboard Network *NEW*

NETAPP FAS960C FILER 6GB w/ 10x DAS14 Array 106-020083

NetApp X274B-R5 144GB Disk Drive New

(1) NetApp V-Series GF980c GF980 NAS w/ ONTAP License

Includes 90-Day Warranty+EmergenSX Value Added Service

Enlarge

NetApp Network Appliance NetCache C6100 - 100% Working

NetApp R150 Storage Shelf Drive Tray 

Expedited shipping available

NetApp Cable P/N:112-00084 Molex P/N 739290024

Expedited shipping available

NetApp F760 Cluster F760 w/ FC9 7 x 36GB

NetApp Network Appliance R150 Base

NetApp X226A 72GB 10k Drive Module

NetApp X261A 250GB ATA Disk for R100 R150

NetApp Cable P/N: 112-00045 Molex P/N 739290018

Expedited shipping available

Network Appliance NetApp VTL700 Virtual Tape Library

NetApp FAS3020 4TB Filer System 2x DS14 MK2 w/14x 144GB

5 Year Next Business Day Warranty on All NetApp

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NetApp R200 Server NVRAM4 Card 256MB PCI-X 111-00023+C0

NETAPP STOREVAULTS500 STOREVAULT S500 (CHASSIS ONLY)

Expedited shipping available

NetApp Cable P/N:112-00028 A0 Molex P/N 739391101

One-day shipping available

NETAPP X1047-R5 PCI-X QUAD-PORT 10/100/1000BT X1047

NETAPP STORAGE SHELF DS14 MK2 - AT 7X 320GB DS14MK2

Expedited shipping available

NetApp X232A 72GB 10K BCS Disk for FC9 

NETAPP STORAGE SHELF DS14 MK2 - AT 7X 73GB DS14MK2

6ES7953-8LL20-0AA0