Smoothness and absence of ripple are crucial for the printing of elaborate color images on reusable plastic-type material cups available at fast-food chains. The color image is made up of millions of tiny ink spots of many colours and shades. The complete glass is printed in a single pass (unlike regular color separation where each color can be published separately). The gearheads must work smoothly enough to synchronize ink blankets, printing plates, and cup rollers without presenting any ripple or inaccuracies that may smudge the image. In this instance, the hybrid servo motor gearbox gearhead reduces motor shaft runout error, which reduces roughness.
At times a motor’s capability could be limited to the point where it requires gearing. As servo manufacturers develop more powerful motors that can muscles applications through more difficult moves and create higher torques and speeds, these motors require gearheads equal to the task.
Interestingly, only about a third of the motion control systems in service use gearing at all. There are, of program, reasons to do therefore. Utilizing a 
gearhead with a servo engine or using a gearmotor can enable the use of a smaller motor, thereby reducing the machine size and cost. There are three primary advantages of going with gears, each which can enable the use of smaller motors and drives and for that reason lower total system cost:
Torque multiplication. The gears and amount of tooth on each gear generate a ratio. If a electric motor can generate 100 in-pounds of torque, and a 5:1 ratio equipment head is mounted on its result, the resulting torque will become near to 500 in-lbs.
When a motor is running at 1,000 rpm and a 5:1 ratio gearhead is mounted on it, the quickness at the output will be 200 rpm. This speed reduction can improve system efficiency because many motors do not operate effectively at very low rpm. For example, consider a stone-grinding mechanism that will require the motor to run at 15 rpm. This slow swiftness makes turning the grinding wheel challenging because the motor will cog. The variable level of resistance of the stone being surface also hinders its simple turning. By adding a 100:1 gearhead and letting the electric motor run at 1,500 rpm, the motor and gear mind provides smooth rotation as the gearhead output offers a more constant drive with its output rotating at 15 rpm.
Inertia matching. Servo motors generate more torque in accordance with frame size because of lightweight materials, dense copper windings, and high-energy magnets. The result is better inertial mismatches between servo motors and the loads they want to control. The use of a gearhead to better match the inertia of the motor to the inertia of the strain can enable the use of a smaller electric motor and outcomes in a far more responsive system that’s easier to tune.