Where can motion technology make the biggest difference in conveying?

Vertical return buffer Vertical buffer systems curve tightly to store products vertically in a moving conveyor system. A modular design allows for system change and expansion, as needed.

Flexibility is arguably the most important characteristic of motion technology. In particular, linear motion components can help end users add functions to solve real, plant floor problems. A vertical transfer unit, for instance, can employ a rodless cylinder to raise and lower products from one conveyor, and, even one floor, to the next. Depending on the vertical travel distance, operators can affix linear guides to these "elevators" for greater smoothness.

Another helpful function based on motion is the ability to position products on nonsynchronous conveyors. This would require a locating plate that mounts to pneumatic cylinders and fastens in the conveyor's center. As pallets arrive at the lift-position unit, they are stopped and raised a few millimeters off the line so work can be performed to the product without damaging belts or chains.

Perhaps the most significant motion technology in conveyors is the belt or chain. Well-designed chains maximize load-carrying abilities and save money by eliminating additional drives (normally the most expensive part). Smart chain design also allows for transport around tight curves — critical to flexible layout. Curves allow "alpine"-style buffering systems to be built for balanced machine output. Additional chain enhancements, such as cleats or friction pads may be required to prevent backsliding.

Conveyors alone are usually not enough to transport products through a packaging or manufacturing system. Complete systems may include SCARA robots or Cartesian motion systems that pick up and move products to reorient them for other processes or place in a box. Motion systems can dispense products into containers on a conveyor, trace a small bead of glue onto passing products, solder, drive screws, or apply labels.

For additional information, please contact Bosch Rexroth Corp. at 800-322-6724, www.boschrexroth.com.