Conveyor Terminology Conveyor Terminology The direction of travel determines the upstream and downstream ends of the conveyor. In addition to the normal limits on the robot range of motion, a belt window must be created for a tracking belt to define the belt area to be accessed by the robot. The following items in the window limit belt access and tracking of parts along the conveyor. ACE User's Guide, 3.6.x, 18316-000 Rev A Page 67 Item Description Upstream limit Specifies the point on a conveyor belt that must be passed before a robot will begin tracking a part. Dynamic wait line Specifies where the robot will wait if there are objects in the queue but not yet within the belt window.
Belt stop line Stops the belt when an object reaches this point. This allows you to stop a belt before objects leave the belt window. (The belt must use an On/Off digital sig- nal.) Pickup limit Specifies the point farthest downstream where the robot can begin accessing an object. It helps control belt-window violations by ensuring that the robot has sufficient time to track and access an object before it reaches the down- stream limit. Downstream limit Specifies the farthest downstream point that the robot is allowed to reach. If the robot is tracking a part when it reaches this point, a belt-window violation will be issued.