Weld Cell Cycle

Briefing

A welding cell fixture clamps a part, triggers a spot-weld, releases the clamp, and signals cycle complete. An E-stop or any mid-cycle clamp anomaly (clamp neither extended nor retracted within a timeout) latches a fault. The pallet must also be present before clamping begins.

Objectives

• Sequence: PART_IN_FIXTURE → CLAMP_EXTEND → wait CLAMP_EXTENDED_LS → WELD_START → wait WELD_COMPLETE → CLAMP_RETRACT → wait CLAMP_RETRACTED_LS → pulse CYCLE_COMPLETE_LAMP
• ESTOP or clamp timeout latches FAULT_LAMP and halts the cell
• FAULT_LAMP clears only when ESTOP is de-asserted and the cell is reset
• PALLET_PRESENT must be true before any clamping begins

I/O Table

Your program will be tested against:

All test cases run automatically when you submit. Assertions are hidden until you pass.

1. #1Full weld cycle completes successfully

   Physics drives all limit switches; CYCLE_COMPLETE_LAMP pulses at end

2. #2CLAMP_EXTEND fires when PART_IN_FIXTURE is asserted

   With part in fixture and pallet present, clamp extend solenoid energises

3. #3ESTOP during weld cycle latches FAULT_LAMP

   E-stop halts the cell and latches the fault indicator