Checkweigher

The U.S. Army Combat Capabilities Development Command – Armaments Center (DEVCOM AC), Small Caliber Munitions Division FCDD-ACM-MI requires an ammunition checkweigher in support of quality control to verify the weight of ammunition components and complete rounds. The checkweigher should have the capability to pass individual components ranging in size from 5.56mm up to .338” diameter over a weigh cell. The system should be optimized to inspect and convey a part with a length of 1.119” and a diameter of approximately 0.3085”. The checkweigher should have a programmable logic controller (PLC) or PC-based controls, and be able to display real-time part weights, mean value trends, and statistical process control (SPC). The system should be capable of weighing objects up to a minimum of 200 grams in weight, with an accuracy of +/- 30 milligrams (mg) or better at +/- 2s, and demonstrate that accuracy consistently with the conveyor belt feeding parts at 80 parts per minute (ppm) or greater. The checkweigher should have a minimum throughput of 120 parts per million (PPM), and system memory should be sufficient to store a minimum of 200 weight profiles. The checkweigher should occupy a space no greater than 15 square feet, run on 110 volts and single phase, and be fail-safe. The checkweigher should have a minimum of four (4) reject stations, and require not more than 100 pounds per square inch (psi) to operate the reject air blast devices. The checkweigher should include a set of wear replacement parts, at least for all transport belts, bearings, and fuses. Operating inputs to the system should be via a color touch screen. • The checkweigher should be a conveyor belt system with the capability to pass individual components ranging in size from 5.56mm up to .338” diameter over a weigh cell. • The checkweigher should be optimized to inspect and convey a part with a length of 1.119” and a diameter of approximately 0.3085”. • The checkweigher should have a programmable logic controller (PLC) or PC-based controls. • The checkweigher should be capable of weighing objects up to a minimum of 200 grams in weight. • The checkweigher should have an accuracy of +/- 30 milligrams (mg) or better at +/- 2s, and demonstrate that accuracy consistently with the conveyor belt feeding parts at 80 parts per minute (ppm) or greater. • The checkweigher should have a minimum throughput of 120 parts per million (PPM). • The checkweigher should occupy a space no greater than 15 square feet. • The checkweigher should run on 110 volts and single phase. • The checkweigher should be fail-safe. • The checkweigher should have a minimum of four (4) reject stations. • The checkweigher should require not more than 100 pounds per square inch (psi) to operate the reject air blast devices. • The checkweigher should include a set of wear replacement parts, at least for all transport belts, bearings, and fuses. • Operating inputs to the system should be via a color touch screen.