Portescap offers Stepper Can Stack with Open Loop Control. Portescap is certified I.S.O. 9001-2000 for quality management, received ISO 14001:2004 certification for environmental management, and ISO 18001:2007 certified. The Stepper Can Stack with Open Loop Control delivers high continuous torque output. This cost effective Stepper Can Stack is a maintenance free device and its motor is brushless. Stepper Can Stack with Open Loop Control is available with unipolar and bipolar windings.