The figure on the right illustrates motors of similar size and with equal drive conditions, i.e. load and speed. The traditional motor system cannot meet parameters such as high resolution (nanometer level), stiffness, zero backlash, short response time etc., all of which are key parameters for a nano-positioning system. Traditional drives also require power to be permanently switched on to hold position and minimize backlash problems. Their response time is relatively long and the start phase of the motion consumes energy while making little or no movement. In position and hold applications, this leads to comparatively high energy consumption.
In contrast, Piezo LEGS® motors have few components and low energy consumption. In hold, for example, the driver is switched off and energy consumption is zero. In addition, response is more or less instant. And while traditional solutions for positioning applications normally comprise a stepper motor, gearbox and lead screw, a Piezo LEGS® solution simply consists of the motor itself.