Kunzwisisa Kwekutanga Kwemachina Encoder
Munyika yekushanda kwemaindasitiri otomatiki, marobhoti, uye zvishandiso zvemagetsi zvezuva nezuva, tinowanzoda chinhu chimwe chete chakafanana: kuziva nzvimbo, kumhanya, kana kutungamira kwekufamba kwechikamu. Apa ndipo panoita basa guru ma encoders (anowanzonzi ma motors). Encoder chishandiso chinoshandura kufamba kwema mechanical—kazhinji kutenderera kana kuchinjika kwemutsara—kuita chiratidzo chemagetsi chinogona kuverengwa nesystem yekudzora senge PLC, microcontroller, kana komputa yeindasitiri. Chinyorwa chino chinokurukura zvekutanga zve encoders, mhando dzadzo, misimboti yekushanda, uye mashandisirwo adzo muminda yakasiyana-siyana.
Chii chinonzi Encoder Machine?
Zvichitaurwa zviri nyore, encoder inzwa yekufamba. Kana mota yemagetsi ikatenderera kana kuti mechanism ikafamba, encoder inogadzira chiratidzo chinomiririra shanduko yenzvimbo. Chiratidzo ichi chinogona kuva digital pulse, binary code, kana analog signal, zvichienderana nerudzi rweencoder inoshandiswa.
Izwi rekuti "muchina wekunyora makodhi" rinowanzoshandiswa munyaya iyi kureva mudziyo wekunyora makodhi wakaiswa muhurongwa hwemakanika (semuenzaniso, mota, conveyor, muchina weCNC). Kunyange zvazvo isiri "muchina" mupfungwa yemudziyo mukuru, encoder chinhu chakakosha chinoita kuti sisitimu inoshanda yega ishande nemazvo uye nguva dzose.
Basa Guru reEncoder
Ma encoders anowanzo shandiswa pazvinhu zvitatu zvikuru:
1. Kuyera nzvimbo (mhinduro yenzvimbo)
Ma encoders anobatsira sisitimu kuona nzvimbo yekona yeshaft (rotary) kana kuti mafambiro emhando yepamusoro (linear). Izvi zvakakosha mumichina yeCNC, maoko erobhoti, uye masisitimu ekutora nekuisa.
2. Kuyera kumhanya (mhinduro yekumhanya)
Nekuverenga huwandu hwemapulses panguva imwe neimwe, mudzori anogona kuona RPM yemota kana kumhanya kwakanangana kwebhandi.
3. Sarudza divi rekutenderera/kufamba (gwara)
Mamwe ma encoders (semuenzaniso incremental ane masaini A na B) anogona kuratidza mafambiro ari kuitwa kuburikidza nemusiyano wechikamu che masaini.
Mabasa matatu aya akakosha zvikuru mumasisitimu ekudzora akavharwa, akadai semamota eservo, uko mutariri anogadzirisa kubuda kwemagetsi zvichibva pamhinduro dze encoder.
Nheyo Yekushanda Yakazara yeEncoder
Chaizvoizvo, encoder inoshanda ne "encode" kufamba muchiratidzo. Kana encoder ikatenderedzwa, chikamu chemukati, chakadai sedhisiki kana magineti yakavharika, chinopfuura nepamusoro pe sensor ye optical kana magnetic. Nguva imwe neimwe slot kana magnetic pole inopfuura nepamusoro pe sensor, chiratidzo che pulse chinogadzirwa. Ma pulse aya anoverengerwa kuti aone kufamba.
Semuenzaniso, encoder ine resolution ye1000 PPR (pulses per revolution). Izvi zvinoreva kuti kutenderera kwega kwega kwakazara kuchaburitsa pulses 1000. Kana sisitimu ikaverenga pulses 500, shaft inenge yatenderera hafu yerevolution (tichifunga kuti kuverenga kwechiteshi chimwe chete uye pasina kuwanda kwequadrature).
Mhando dzeEncoders Zvichibva Pakubuda
1. Kuwedzera kweEncoder
Incremental encoder inogadzira pulse pese panoitika shanduko panzvimbo. Masaini akajairika ndeaya:
– Channel A naB (quadrature): zviratidzo zviviri zvesikweya zvine musiyano wechikamu che90 degrees kuti zvionekwe divi.
– Channel Z (indekisi): kurova kwemoyo kamwe chete padenderedzwa.
Hunhu hwekuwedzera:
– Haichengete nzvimbo yakakwana. Kana magetsi akadzimwa, nzvimbo yekupedzisira "inorasika" kunze kwekunge paine system yekudzokorora (homing).
- Yakakodzera kuyera kumhanya uye kufamba kwakabatana.
- Zviri nyore uye zvinowanzo dhura.
2. Absolute Encoder
Iyo absolute encoder inopa kukosha kwenzvimbo yakasarudzika pakona yega yega yeshaft. Kana yadzoserwa, sisitimu inoziva ipapo ipapo nzvimbo yacho pasina chikonzero chekudzokera kumashure.
Ma encoders akazara anowanzo shandisa:
- Kubuda kwakafanana (kwakareba),
- Zvinobuda muzvikamu zvakaita seSSI, BiSS, CANopen, kana EtherCAT,
- Mhinduro yekugadzirisa muzvidimbu (semuenzaniso 12-bit, 16-bit) iyo inosarudza huwandu hwenzvimbo dzakasiyana.
Hunhu hwakakwana:
– Nzvimbo hairasikirwi kana magetsi akadzimwa (zvichienderana netekinoroji uye kana multi-turn inoshandisa bhatiri/giya).
- Yakanakira mashandisirwo anoda kunyatsojeka uye kuchengetedzeka.
Mhando dzeEncoder Zvichibva paSensor Method
1. Optical Encoder
MaOptical encoders anoshandisa maLED nema optical sensors kuti aone maburi ari mudiski. Zvakanakira:
- Kugadziriswa kwepamusoro uye kunyatsorongeka kwakanaka.
- Inowanikwa zvakanyanya kune zvinodiwa mumaindasitiri.
Zvakashata:
– Inonyanya kubatwa neguruva, mafuta, kana kudedera kwakanyanya kana dziviriro isina kunaka.
2. Magnetic Encoder
Magnetic encoders anoshandisa magineti uye Hall kana magnetoresistive sensors. Zvakanakira zvavo:
- Inodzivirira zvakanyanya kumamiriro ekunze akasviba, guruva uye hunyoro.
- Yakasimba pakushandiswa kwakaoma.
Zvakashata:
- Kazhinji resolution yakaderera pane ye optical (kunyange zvazvo matekinoroji mazhinji emazuva ano akanaka kwazvo).
MaParameter Akakosha muEncoder
Pakusarudza encoder, zvinhu zvakakosha zvakawanda zvinofanira kunzwisiswa:
1. Mhinduro
Kugadziriswa kwekuwedzera kunowanzo ratidzwa muPPR/CPR, nepo kuratidzwa kwemhedzisiro kwakazara kuchiratidzwa muzvidimbu. Kana kuratidzwa kwacho kwakakwira, chiyero chenzvimbo chinowedzera kunaka.
2. Rudzi rwemagetsi runobuda
Semuenzaniso, TTL, HTL, open collector, push-pull, line driver (RS-422). Izvi zvinokanganisa kuenderana nePLC inputs kana servo driver.
3. Kushanda kwemagetsi
Kazhinji 5V, 12V, kana 24V. Iva nechokwadi chekuti inoenderana nesisitimu yako.
4. Kumhanya kwakanyanya (RPM yepamusoro / frequency yepamusoro)
Iyo encoder inofanira kukwanisa kugadzira ma pulses panguva iyo controller inogona kuverenga pasina kurasikirwa nedata.
5. Rudzi rwekuisa michina
Vamwe vanoshandisa shafts dzakasimba, hollow shafts, kana kuti mounting ne couplings. Kurongeka kweshaft kwakakosha kuti encoder igare kwenguva refu uye ive yakarurama.
6. Nzvimbo yebasa
Funga nezveIP rating (semuenzaniso IP65), tembiricha yekushanda, kudedera, uye kusangana nemvura kana guruva.
Encoder inoverengwa sei neControl System?
Kuti uverenge incremental encoder, controller inoverenga ma pulses kubva kuma channels A na B. Nekushandisa quadrature method, system inowanzoita 4x decoding, zvichireva kuti shanduko yega yega mumucheto wechiratidzo cheA/B inoverengwa kuitira kuti resolution inoshanda iwedzere kana.
Kune ma absolute encoders, controller inoverenga data renzvimbo kuburikidza ne specific communication protocol. Muma industrial systems emazuva ano, ma absolute encoders anowanzo batanidzwa mu fieldbus network kuitira kuti data renzvimbo rigone kuverengwa munguva chaiyo ne PLC uye kushandiswa mukudzora kufamba.
Pamusoro pezvo, zvakakosha kutarisisa ruzha uye kupindira kwemagetsi (EMI). Tambo dze encoder dzinowanzo shandisa tambo dzakadzivirirwa, kudzika kwakakodzera, uye ma differential inputs padaro refu kuti masaini arambe akagadzikana.
Mienzaniso yeKushandiswa kweEncoder
1. Servo motor uye BLDC motor
Ma encoders anogonesa kudzora nzvimbo nekumhanya kwakanyatsojeka, semuenzaniso mumichina yekurongedza, marobhoti, kana michina yekudhinda.
2. Sisitimu yekuverenga zvinhu zvinotakura zvinhu nezvigadzirwa
Iyo encoder inoverenga daro rinofambwa nebhandi kuti ione kuti inofanira kucheka, kumaka, kana kuzadza riini.
3. Michina yeCNC nemaprinta e3D
Ma encoders anobatsira pakugadzirisa nzvimbo, kudzora kufamba kwe axis, uye kuvandudza kururama.
4. Maelevator, maescalator, uye magonhi anongoerekana aita otomatiki
Iyo encoder inoshandiswa kuona nzvimbo yekabhini, kumhanya, uye kudzora kumira zvakanaka.
Zvikanganiso Zvakajairika uye Mazano Anoshanda
Mamwe matambudziko anowanzoitika ne encoders anosanganisira:
– Kurasikirwa kana kusvetuka kwechiratidzo nekuda kwetambo dzisina kusimba, ruzha, kana kubatana kusina kunaka kwepasi.
– Kukuvadzwa kwemuchina kunokonzerwa nekusarongeka kwemaclutch, kuwanda kwema radial loads, kana kudedera.
- Kuverenga nzvimbo hakusi iko kana mhinduro ye encoder isingaenderane ne configuration ye controller.
Mazano ari nyore:
- Shandisa tambo dzakadzivirirwa uye paradzanisa nzira dzetambo kubva kutambo dzemagetsi dzemota.
- Iva nechokwadi chekuti shaft yakaiswa yakabatana uye shandisa ma coupling anochinjika kana zvichidikanwa.
- Gadzirisa maPPR/bit parameters ari mumudziyo wekudzora zvichienderana nedatasheet re encoder.
Penutup
Kunzwisisa kwakakosha kwemichina ye encoder kunotanga nekuziva kuti encoder i sensor inoshandura kufamba kuita masaini emagetsi enzvimbo, kumhanya, uye kudzorwa kwegwara. Nekunzwisisa musiyano uripo pakati pe incremental ne absolute, kusarudza nzira ye optical kana magnetic sensor, uye kufunga nezve parameters dzakadai se resolution, output, uye nharaunda, tinogona kuona encoder yakakodzera yekushandisa. Muma system emazuva ano e automation, encoders haasi ma add-ons chete, asi zvikamu zvikuru zvinosarudza kururama, kugadzikana, uye kushanda zvakanaka kwekushanda kwemuchina.
Kana muchida, ndinogona kubatsira kugadzira vhezheni yenyaya yacho ine hunyanzvi (nePPR kusvika pakuverenga kure, mienzaniso yeA/B/Z wiring, uye mazano emhando yekubuda kune mamwe maPLC) kana vhezheni yakareruka kune vanotanga kuverenga.
