Injini ndi gawo lofunikira kwambiri la mphamvu paChosindikizira cha 3DKulondola kwake kumagwirizana ndi zotsatira zabwino kapena zoyipa za kusindikiza kwa 3D, makamaka kusindikiza kwa 3D pogwiritsa ntchito mota ya stepper.
Kodi pali makina osindikizira a 3D omwe amagwiritsa ntchito ma servo motors? Ndi abwino kwambiri komanso olondola, koma bwanji osagwiritsa ntchito pa makina osindikizira a 3D wamba?
Vuto limodzi: ndi lokwera mtengo kwambiri! Poyerekeza ndi osindikiza wamba a 3D sikoyenera. Ngati ndi yabwino kwa osindikiza mafakitale ndi yofanana, ikhoza kupititsa patsogolo kulondola pang'ono.
Apa titenga ma mota awiriwa, kusanthula mwatsatanetsatane koyerekeza kuti tiwone kusiyana kwake.
Matanthauzidwe osiyanasiyana.
Galimoto yoyendera masitependi chipangizo choyenda chokha, ndi chosiyana ndi AC wamba komansoMa mota a DC, ma mota wamba kuti ayendetsedwe ndi magetsi, koma mota yoyendera siili, mota yoyendera ndi kulandira lamulo kuti iyendetse sitepe.
Servo motor ndi injini yomwe imalamulira magwiridwe antchito a zida zamakaniko mu servo system, zomwe zingapangitse liwiro lowongolera, kulondola kwa malo kukhala kolondola kwambiri, ndipo zimatha kusintha chizindikiro cha voltage kukhala torque ndi liwiro kuti chiyendetse chinthu chowongolera.
Ngakhale kuti ziwirizi ndi zofanana mu njira yowongolera (chingwe chogunda ndi chizindikiro chowongolera), pali kusiyana kwakukulu pakugwiritsa ntchito magwiridwe antchito ndi nthawi yogwiritsira ntchito. Tsopano kuyerekeza kugwiritsa ntchito magwiridwe antchito awiriwa.
Kulondola kwa ulamuliro ndi kosiyana.
Magawo awirimota yosakanizidwa ya stepperngodya ya sitepe nthawi zambiri ndi , 1.8 °, 0.9 °
Kulondola kwa kuwongolera kwa mota ya AC servo kumatsimikiziridwa ndi cholembera chozungulira kumbuyo kwa shaft ya mota. Mwachitsanzo, pa mota ya Panasonic yokhala ndi digito yonse ya AC servo, ya mota yokhala ndi encoder yokhazikika ya mizere 2500, kugunda kofanana ndi 360°/10000=0.036° chifukwa cha ukadaulo wa ma frequency anayi omwe amagwiritsidwa ntchito mkati mwa drive.
Pa mota yokhala ndi encoder ya 17-bit, drive imalandira ma pulses 217=131072 pa kuzungulira kwa mota, zomwe zikutanthauza kuti ma pulse ofanana ndi 360°/131072=9.89 masekondi, omwe ndi 1/655 ya ma pulse ofanana ndi mota ya stepper yokhala ndi ngodya ya step 1.8°.
Makhalidwe osiyanasiyana otsika pafupipafupi.
Mota ya stepper pa liwiro lotsika idzawoneka ngati kugwedezeka kwa ma frequency otsika. Ma frequency a kugwedezeka amagwirizana ndi momwe katundu amagwirira ntchito komanso momwe galimoto imagwirira ntchito, ndipo nthawi zambiri imaonedwa kuti ndi theka la ma frequency oyambira opanda katundu a mota.
Chochitika ichi cha kugwedezeka kwa ma frequency otsika chomwe chimatsimikiziridwa ndi mfundo yogwirira ntchito ya mota ya stepper chimawononga kwambiri magwiridwe antchito abwinobwino a makina. Pamene mota za stepper zikugwira ntchito pa liwiro lotsika, ukadaulo wothira madzi nthawi zambiri uyenera kugwiritsidwa ntchito kuthana ndi vuto la kugwedezeka kwa ma frequency otsika, monga kuwonjezera ma dampers ku mota, kapena kugwiritsa ntchito ukadaulo wogawa magawo pa drive.
Mota ya AC servo imayenda bwino kwambiri ndipo sigwedezeka ngakhale pa liwiro lotsika. Dongosolo la AC servo lili ndi ntchito yoletsa kugwedezeka, yomwe imatha kuphimba kusowa kwa kulimba kwa makina, ndipo dongosololi lili ndi ntchito yowunikira ma frequency amkati, yomwe imatha kuzindikira malo ozungulira makinawo ndikuthandizira kusintha kwa makinawo.
Magwiridwe antchito osiyanasiyana.
Kuwongolera kwa mota ya stepper ndi kuwongolera kotseguka, kuchuluka kwambiri koyambira kapena katundu wamkulu kwambiri kumatha kuchitika chifukwa cha kutayika kwa masitepe kapena kutsekeka, liwiro lalikulu kwambiri pamene kuyimitsa kumatha kupitirira muyeso, kotero kuti muwonetsetse kuti kuwongolera kwake kuli kolondola, kuyenera kuthana ndi vuto la kuthamanga mmwamba ndi pansi.
Dongosolo loyendetsa la AC servo loyendetsedwa ndi AC servo loyendetsedwa ndi locked-loop, dalaivala amatha kuyesa mwachindunji chizindikiro cha mayankho a encoder ya injini, kapangidwe ka mkati ka malo ozungulira ndi liwiro lozungulira, nthawi zambiri siziwoneka ngati kutayika kwa stepper motor chifukwa cha zochitika zoyenda kapena overshoot, magwiridwe antchito owongolera ndi odalirika kwambiri.
Mwachidule, makina a AC servo m'mbali zambiri za magwiridwe antchito ndi abwino kuposa mota ya stepper. Koma nthawi zina zosafunikira nthawi zambiri amagwiritsanso ntchito mota ya stepper poyendetsa mota. Chosindikizira cha 3D sichifuna zambiri, ndipo mota ya servo ndi yokwera mtengo kwambiri, kotero kusankha kwakukulu kwa mota ya stepper.
Nthawi yotumizira: Feb-05-2023