![\"beltdriveforservoarticle\"](\"http:\/\/blog.misumiusa.com\/wp-content\/uploads\/2015\/02\/beltdriveforservoarticle.png\")
<\/a>From the example above, let\u2019s assume below are our requirements:
\nTravel requirement: 2500mm\/sec
\nStroke: 2 meter
\nLoad: 1 Kg<\/p>\n
Motor Sizing Example Results:<\/strong>\u00a0(Sizing result is based on pulley diameter on the belt drive system)<\/p>\n Before\u00a0you\u00a0can select a stepper or a servo system,\u00a0you’ll first\u00a0need to know what the motor requirements are for your\u00a0application. You’ll\u00a0need to calculate inertia, required torque, and required speed. You will also need\u00a0to add safety factors for the required torque calculation.<\/p>\n As an example, let\u2019s say the required speed for this application is 2871 r\/min, and the required torque is 3.117 lb-in, or 48.87 oz-in. Based on these needs, let\u2019s compare a Nema 23 size servo and stepper motor side by side.<\/p>\n As you can see from the speed toque curve above, Stepping motor would have a higher starting torque at low speed, but as speed increases, the torque curve falls.\u00a0 Comparing it with the servo motor torque curve, the servo motor might not have a high starting torque, but a servo system maintain its torque quite well at higher speed, which is why for a high speed positioning application a servo system would be preferred.<\/p>\n By plotting on the charts\u00a0where our application falls on the torque curve, we can highlight\u00a0the difference in system performance for our high speed application. This identifies that the best choice for our application would be the Servo motor.\u00a0 Using a stepper would leave no safety factor for the application as a servo system would.\u00a0 As listed above our torque requirement is 48.87 oz-in.<\/p>\n<\/a><\/p>\n<\/a><\/a><\/p>\n