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| Problem | Possible Cause | Remedy | |---------|----------------|--------| | No acid flow | Clogged nozzle or empty reservoir | Clean nozzle with ultrasonic bath; refill acid | | Over-etching (broken wires) | Temperature too high or time too long | Reduce temp to 70°C; reduce cycles to 5–10 sec | | Incomplete removal | Old acid or wrong acid type | Replace acid; use fuming nitric for hard epoxies | | Acid splashing | Nozzle too close to sample | Increase nozzle height to 15–20 mm |
Initiates the arc and the wire feed. Some models feature a contactor that cuts off current immediately when the trigger is released 4. Basic Operating Procedure Preparation: decastar 150e manual