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_________________________________________ 檢測(cè)用的儀器與檢測(cè)定位精度所用的相同。一般檢測(cè)方法是在靠近各坐標(biāo)行程中點(diǎn)及兩端的任意三個(gè)位置進(jìn)行測(cè)量,每個(gè)位置用快速移動(dòng)定位,在相同條件下重復(fù)7次定位,測(cè)出停止位置數(shù)值并求出讀數(shù)最大差值。以三個(gè)位置中最大一個(gè)差值的二分之一,附上正負(fù)符號(hào),作為該坐標(biāo)的重復(fù)定位精度,它是反映軸運(yùn)動(dòng)精度穩(wěn)定性的最基本指標(biāo)。 3、直線運(yùn)動(dòng)的原點(diǎn)返回精度檢測(cè) 原點(diǎn)返回精度,實(shí)質(zhì)上是該坐標(biāo)軸上一個(gè)特殊點(diǎn)的重復(fù)定位精度,因此它的檢測(cè)方法完全與重復(fù)定位精度相同。 4、直線運(yùn)動(dòng)的反向誤差檢測(cè) 直線運(yùn)動(dòng)的反向誤差,也叫失動(dòng)量,它包括該坐標(biāo)軸進(jìn)給傳動(dòng)鏈上驅(qū)動(dòng)部位(如伺服電動(dòng)機(jī)、伺趿液壓馬達(dá)和步進(jìn)電動(dòng)機(jī)等)的反向死區(qū),各機(jī)械運(yùn)動(dòng)傳動(dòng)副的反向間隙和彈性變形等誤差的綜合反映。誤差越大,則定位精度和重復(fù)定位精度也越低。 反向誤差的檢測(cè)方法是在所測(cè)坐標(biāo)軸的行程內(nèi),預(yù)先向正向或反向移動(dòng)一個(gè)距離并以此停止位置為基準(zhǔn),再在同一方向給予一定移動(dòng)指令值,使之移動(dòng)一段距離,然后再往相反方向移動(dòng)相同的距離,測(cè)量停止位置與基準(zhǔn)位置之差。在靠近行程的中點(diǎn)及兩端的三個(gè)位置分別進(jìn)行多次測(cè)定(一般為7次),求出各個(gè)位置上的平均值,以所得平均值中的最大值為反向誤差值。 RELIANCE ELECTRIC 57408 POWER MODULE INTERFACE (NIB)RELIANCE ELECTRIC 48267C RESISTOR DYNAMIC BRAKING NIB RELIANCE ELECTRIC 2TC3075 NSFP 2TC3075 Reliance Electric GV/3000 SE 5V4460 5Hp NEW 2X RELIANCE ELECTRIC 14C11 MINIPAK PLUS DC DRIVE 1.5HP RELIANCE ELECTRIC 69330-3A NSFP 693303A RELIANCE ELECTRIC FIELD REGULATOR MODULE 57412 57412-E RELIANCE ELECTRIC 1/3HP AC MOTOR FBP FRAME 1725RPM NOS RELIANCE ELECTRIC BRAKE COIL 413366-AH 30/460V 60HZ RELIANCE ELECTRIC GV6000 AC DRIVE 3 HP 3 PHASE RELIANCE ELECTRIC REEVES 9205 X-V PULLEY 1-1/8" H95509 RELIANCE ELECTRIC 418285-112A VCRB-1A CONTROL BOARD NEW Reliance Electric BDC-25L Brushless Amplifier Reliance Electric 0-48680-117 Regulator Board GP 2000 New Reliance Electric Remote Operator Adapt Kit 14C220 Expedited shipping available Reliance Electric AC Drive Model 6MDDN-2P3101 Expedited shipping available reliance electric flexpak 3000 75/150 HP DC DRIVE RELIANCE ELECTRIC KP-H330 BLOWER 1/10HP RELIANCE ELECTRIC PATCH RELIANCE ELECTRIC GV6000 AC DRIVE 7.5HP Reliance Electric Output Module 57C403 Reliance Electric VTAC 7 HVAC DRIVE RELIANCE ELECTRIC CALIBRE 13.5 HP ELECTRIC MOTOR **NIB** Reliance Electric Analog Input 61C542A Expedited shipping available RELIANCE ELECTRIC 69932-218 CAPACITOR LOT OF 6 Reliance Electric SP500 VS AC Drive 1 HP 230V... 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