Position and Speed of Electric Motors

Electric motors used in automation systems need some control. We will give you an example of a robot that removes a machined piece and places it on the tray, so that it is possible we will describe its movements:

  • leaving an initial position, starting and accelerating;
  • when approaching a favorable attack position, decelerate to a stop;
  • approaching the part at low speed;
  • stop and grab the part;

Start back and accelerate;

The electric motors that are required for this operation must have speed control, for acceleration and deceleration and positioning. They are critical and meticulous controls because if the robot makes a wrong trajectory, with higher speed, it may collide with some accessory or break the part.

The speed and positioning control is done in cycles where the position and the speed of displacement has certain importance for the control of the motor. These electric motors usually already come with sensing coupled to their axis and then receive the designation of “servomotor”.

There are direct and alternating current servo motors.