Makina opangira ma roll a njanji ndi zida zopangira zomwe zimagwiritsidwa ntchito popanga njanji kapena njanji zamayendedwe a sitima. Makinawa amagwiritsa ntchito ma roll angapo kuti apinde ndikupanga coil yachitsulo kukula ndi mawonekedwe omwe mukufuna komanso molondola kwambiri. Njirayi imaphatikizapo kupatsa chingwe chachitsulo chathyathyathya kudzera mu ma roll angapo omwe pang'onopang'ono amapanga chitsulocho kukhala mawonekedwe omwe mukufuna. Ma roll omwe amachokera amagwiritsidwa ntchito m'njira zosiyanasiyana zoyendera, kuphatikiza sitima zapansi panthaka, sitima zapamtunda ndi ma tram.
Mukufuna njira yodalirika komanso yotsika mtengo yopangira zida zapamwamba kwambiri za sitima? Makina athu opangira ma orbital roll amapereka yankho labwino kwambiri. Zipangizo zathu zapangidwa kuti zipange zida zolimba, zolimba komanso zosasinthasintha kuti zikwaniritse zosowa za mapulojekiti oyendera amitundu yonse.