Abstract
Precise control of axis position such as permanent-magnet DC servomotor is an enabling technology for automatic machine tools. The basic element is a DC motor, in which there are loops of wire on an armature that is free to rotate on bearings. The armature is in the presence of a magnetic field created by permanent magnets. When a voltage is applied to one of the loops, a torque is created, which causes the armature to rotate. The torque created by the applied voltage is used to accelerate the inertia of the motor and screw, and to overcome the friction and load torques. The design consists of two transparent discs with some radial lines marked on them, a light source and a light sensor. One disc rotates with the DC motor armature, and one does not. The commanded table position is also converted into pulses, or counts, by a piece of software called the interpolator. However, if the amplifier is more powerful, then positioning of the axis is less sensitive to loads and disturbances.
| Original language | English |
|---|---|
| Pages | 24-26 |
| Number of pages | 3 |
| Volume | 63 |
| No | 7 |
| Specialist publication | Cutting Tool Engineering |
| State | Published - Jul 2011 |
| Externally published | Yes |