Turning Horsepower Calculator. Calculate the horsepower required for a turning operation based on the feed rate, depth of cut, and cut diameter, which will determine the material removal rate (or metal removal rate). As well as the spindle torque for a given spindle speed (RPM). The motor horsepower required for the turning operation can. DC Motor Calculations DC Motor Resource: Motor Calculations, Formulas And Examples When selecting a DC motor for an application, or when developing a powered prototype there are numerous calculations and formulas which must be considered to produce a well-functioning, sufficiently-powered, and safe device.
Here’s an interesting fact about DVD players: They actually change the angular speed of the DVD to keep the section of the DVD under the laser head moving at constant linear speed.Say that a DVD has a mass of 30 grams and a diameter of 12 centimeters. It starts at 700 revolutions per second when you first hit play and winds down to about 200 revolutions per second at the end of the DVD 50 minutes later. What’s the average torque needed to create this acceleration? You start with the torque equation:A DVD is a disk shape rotating around its center, which means that its moment of inertia is.