Evaluating Tooling Acceptance Criteria during Overseas Factory Acceptance Testing
Rigorous overseas tooling acceptance demands steady-state thermal runs, single-cavity Cpk validation, complete disassembly wear audits, and escrow-backed signoff.
Dry Cycling
Meaning
Full speed operation of a machine or production line without the introduction of raw materials or parts. Executing dry cycling allows technicians to verify the mechanical timing and electronic logic of an assembly before actual production begins. It confirms that all movements occur within the specified cycle time without physical interference.
Mechanical Verification
Moving parts are checked for clearance and alignment under the heat and vibration of continuous operation. During dry cycling, sensors and actuators must trigger in the correct sequence to prevent collisions. This phase often reveals wear patterns or lubrication issues that are less obvious during slow speed manual checks.
Process Readiness
Control software is stressed to identify bugs that might cause a system crash or safety violation. By running dry cycling for several hours, a facility establishes the reliability of the hardware before risking expensive feedstock. The cost of a failure during this stage is limited to electricity and labor rather than contaminated product.
Duration Requirement
Testing periods must be long enough to reach steady state operating temperatures for motors and gearboxes. A successful dry cycling run provides the data needed to sign off on the basic mechanical integrity of the installation. If a fault occurs, the clock resets until the root cause is fixed.
This rigorous protocol ensures that the equipment can handle the stresses of a full production schedule without the risk of an unexpected mechanical breakdown during the first shift of operation.