Smoothness and lack of ripple are essential for the printing of elaborate color images on reusable plastic-type cups offered by fast-food chains. The colour image comprises of millions of tiny ink dots of many colors and shades. The complete glass is printed in a single complete (unlike regular color separation where each color can be printed separately). The gearheads must operate smoothly enough to synchronize ink blankets, printing plates, and glass rollers without introducing any ripple or inaccuracies that may smudge the image. In this instance, the hybrid gearhead decreases motor shaft runout mistake, which reduces roughness.
At times a motor’s capability could be limited to the stage where it requires gearing. As servo producers develop better motors that can muscle mass applications through more difficult moves and create higher torques and speeds, these motors require gearheads add up to the task.
Interestingly, only about a third of the movement control systems in service use gearing at all. There are, of course, good reasons to do so. Utilizing a gearhead with a servo electric motor or using a built-in gearmotor can enable the use of a smaller motor, therefore reducing the system size and price. There are three major advantages of going with gears, each which can enable the use of smaller sized motors and drives and for that reason lower total system price:
Torque multiplication. The gears and number of teeth on each gear produce a ratio. If a electric motor can generate 100 in-pounds of torque, and a 5:1 ratio gear head is attached to its output, the resulting torque will end up being close to 500 in-lbs.
When a motor is running at 1,000 rpm and a 5:1 ratio gearhead is mounted on it, the speed at the output will be 200 rpm. This speed reduction can improve system efficiency because many motors do not operate effectively at suprisingly low rpm. For example, look at a stone-grinding mechanism that will require the motor to perform at 15 rpm. This slow swiftness makes turning the grinding wheel challenging because the motor will cog. The variable resistance of the rock being floor also hinders its simple turning. With the addition of a 100:1 gearhead and servo gear reducer letting the electric motor run at 1,500 rpm, the electric motor and gear head provides smooth rotation as the gearhead output provides a more constant force with its output rotating at 15 rpm.
Inertia matching. Servo motors generate more torque in accordance with frame size thanks to lightweight materials, dense copper windings, and high-energy magnets. The effect is greater inertial mismatches between servo motors and the loads they are trying to control. The usage of a gearhead to raised match the inertia of the electric motor to the inertia of the load can enable the use of a smaller engine and outcomes in a far more responsive system 
that’s easier to tune.