Task 14. Find mistakes in the following paragraph and correct them.
Date: 2015-10-07; view: 470.
Task 13. Fill in the words from the list below. Use each word only once.
installation, shaft, servomotor, smooth, , force,
The smaller servomotors now available … gearheads to operate at higher speeds, making vibrations more likely. Inadvertent misalignment between servomotors and gearboxes, which often occurs during …, is a common source of vibration. The mounting of conventional motors with gearboxes requires several precise connections. The output … of the motor must be attached to the pinion gear that slips into a set of planetary gears in the end of the gearbox, and an adapter plate must joint the motor to the gearbox. Unfortunately, each of these connections can introduce slight alignment errors that accumulate to cause overall motor/gearbox misalignment.
The pinion is the key to … operation because it must be aligned exactly with the motor shaft and gearbox. Until recently it has been standard practice to mount pinions in the field when the motors were connected to the gearboxes. This procedure often caused the assembly to vibrate. Engineers realized that the integration of gearheads into the … package would solve this problem, but the drawback to the integrated unit is that failure of either component would require replacement of the whole unit.
However, the factory-installed pinion requires a floatings bearing to support the shaft with a pinion on one end. The Bayside Motion Group of Bayside Controls Inc., Port Washington, New York, developed a self-aligning bearing for this purpose. Bayside gearheads with theese pinions is rated for input speeds up to 5000 rpm. A collar on the pinion shaft's other end mounts to the motor shaft. The bearing holds the pinion in place until it is mounted. At thet time a pair of bearings in the servomotor support the coupled shaft. The self-aligning feature of the floating bearing lets the motor bearing support the shaft after installation.