Roller Tables
Roller tables, also called positioning tables, are motorized linear slides moved by drive mechanisms that allow for low-friction precision movement along linear-axis. Roller tables may have one or multiple axis with shafts or tables which push, pull or position all types of automated machinery. Industries that utilize roller tables include industrial automation equipment, fiber optics, semiconductor and material handling. With high accuracy and heavy load capacity, roller table applications include laser machining, factory automation, CNC machining and microelectrics assembly.
Roller tables are comprised of a flat linear base and a moving carriage that houses cylindrical-shaped bearings. The base rail consists of one machined v-grooved rail which interfaces with the two outer rails attached to the carriage. Usually, rollers are alternately crossed at a 45ยบ angle between the table and the base to create crossed roller tables. Crossed roller tables provide heavier load capabilities and better movement control than uncrossed roller tables. The table is a flat platform that is attached to the carriage in order to achieve greater load carrying capabilities. Commonly, the carriage is made from aluminum and the roller rail set is made from hardened steel.
Able to withstand force in any direction, roller tables are highly corrosion-resistant and offer high stiffness or a density of structure that enables them to handle massive loads. Cost-efficient and highly accurate, many roller tables are also adjustable to fit different applications and have the ability to be assembled into multi-axis systems. Roller tables contain linear cylindrical bearings that provide the least mechanical noise of any bearing table. Common roller table types include low profile roller tables, heavy duty roller tables and crossed roller tables.