Smoothness and absence of servo motor gearbox ripple are crucial for the printing of elaborate color pictures on reusable plastic cups offered by fast-food chains. The colour image comprises of an incredible number of tiny ink spots of many colours and shades. The entire glass is printed in one pass (unlike regular color separation where each color is certainly imprinted separately). The gearheads must work easily enough to synchronize ink blankets, printing plates, and glass rollers without presenting any ripple or inaccuracies that may smudge the image. In cases like this, the hybrid gearhead decreases motor shaft runout mistake, which reduces roughness.
Sometimes a motor’s capability may be limited to the point where it requires gearing. As servo producers develop more powerful motors that can muscles applications through more complicated moves and generate higher torques and speeds, these motors require gearheads add up to the task.
Interestingly, only about a third of the movement control systems operating use gearing at all. There are, of course, reasons to do so. Utilizing a gearhead with a servo electric motor or using a built-in gearmotor can enable the usage of a smaller motor, therefore reducing the system size and price. There are three principal advantages of going with gears, each of 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 make a ratio. If a engine can generate 100 in-pounds of torque, and a 5:1 ratio equipment head is mounted on its output, the resulting torque will be close to 500 in-lbs.
When a motor is operating at 1,000 rpm and a 5:1 ratio gearhead is attached to it, the acceleration at the output will be 200 rpm. This speed decrease can improve system efficiency because many motors usually do not operate effectively at suprisingly low rpm. For example, consider a stone-grinding mechanism that will require the motor to perform at 15 rpm. This slow acceleration makes turning the grinding wheel tough because the motor will cog. The variable level of resistance of the 
rock being ground also hinders its simple turning. With the addition of a 100:1 gearhead and letting the engine run at 1,500 rpm, the motor and gear mind provides smooth rotation while the gearhead output provides a more constant power 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 better inertial mismatches between servo motors and the loads they want to control. The utilization 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 motor and results in a more responsive system that is easier to tune.