The ball screw slide module linear stage can be positioned repeatedly, can accurately record the accuracy, and achieve the best motion effect. Let's take a look at the accuracy requirements for repeated positioning.
Lub reproducibility ntawm cov ntsia hlau swb positioning system hais txog qhov kev hloov pauv ntawm nws txoj haujlwm tiag tiag thaum sim txuas ntxiv mus dhau ib txoj haujlwm tshwj xeeb. Muaj ib qho kev rov ua tau zoo heev (qhov tseeb yuav siab, lossis nws yuav tsis siab) ntau zaus los ntawm tib txoj haujlwm, txawm tias nws nyob rau qhov twg, nws qhia tau hais tias tsis tshua muaj neeg tawg. Qhov sib txawv ntawm kev txav ib qho taw tes rau tib qho kev taw qhia (rov ua dua nyob rau hauv ib qho kev taw qhia), txav mus rau ib qho taw qhia nyob rau hauv qhov kev coj rov qab (ob-txoj kev rov ua dua) thiab txav mus rau qhov sib txawv. Feem ntau hais lus, txoj hauj lwm hloov hauv ob- txoj kev txav mus los loj dua li ntawm ib qho - txoj kev txav mus los. Tsuas yog saib cov ntaub ntawv repeatability ntawm unilateral txav, cov nyhuv ntawm backlash tsis pom tseeb.
If the repeatability requirements are high, it is best not to use a lead screw and use a linear motor as an actuator. Although this requirement increases the use of linear encoders and both the slider and the servo controller need to work in closed-loop mode, their performance has been greatly improved because of the encoder's resolution and the inevitable thermal effect.
Txawm hais tias linear tawm tswv yim sensors tuaj yeem siv los ntsuas cov yam ntxwv ntawm qhov kaw - lub voj kaw qhov chaw, thaum qhib - lub voj lossis lub tshuab hluav taws xob tig rov qab tau txav mus rau ntau zaus, cov ntsia hlau lead yuav overheat vim kev sib txhuam, uas yuav ua rau thermal expansion thiab contraction thiab txoj hauj lwm sib txawv. Raws li qhov tshwm sim, cov ntaub ntawv rov ua dua ntawm tus qauv muab tso rau hauv lub rooj zaum zawv zawg (tsis yog tag nrho servo system) tau txais los ntawm txoj kev no yuav ua rau tag nrho cov yam ntxwv tshwj xeeb ntawm cov hlau lead thiab txiv ntseej. Thermal expansion thiab contraction feem ntau yog nyob ntawm kev khiav hauj lwm ceev thiab lub luag hauj lwm voj voog. Yog tias lub sijhawm ntawm qhov kev sim rov ua dua yog luv dhau, nws yuav tsis tuaj yeem cuam tshuam rau qhov cuam tshuam ntawm ib puag ncig kub hloov pauv.
Txawm hais tias txoj kev tau piav qhia saum toj no txhawm rau tshem tawm qhov cuam tshuam ntawm thermal cuam tshuam ntawm kev ntsuas rov ua dua yog qhov tseeb dhau lawm, peb lub hom phiaj yog ua kom pom tseeb tias peb cov tshuaj tiv thaiv {{0}}backlash txiv ntoo (siv nrog cov ntsia hlau lead- driven carriage) muaj peev xwm ua tau. Rov ua yam ntxwv. Cov txiaj ntsig ntawm kev siv ntau ntawm laser interferometry tau pom tias tus nqi unidirectional raug tsawg dua 0.5 microns (nrog rau ntau lwm yam khoom ntawm 0.1 thiab 0.3 microns), thiab tus nqi bidirectional tsis tshaj 1 micron (ntau yam khoom nyob nruab nrab ntawm 0.2 thiab 0.3 microns). 0.5 microns). Tsis tas li ntawd, kev tiv thaiv -backlash txiv ntoo tsim muaj tus kheej- cov yam ntxwv them nyiaj, txawm tias tom qab siv sijhawm ntev -, qhov rov ua tau tus nqi ntawm cov cuab yeej poob qis dua 5 microns.
Nws tuaj yeem pom los ntawm cov saum toj no tias lub pob ntsia hlau swb lub rooj pwm kuj tseem muaj qhov yuav tsum tau ua kom rov ua qhov tseeb qhov tseeb, thiab qhov tseeb dua.
Tiv tauj peb
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