Espresso gaskets and steam valves hate hand testing: six-station endurance machine doses, locks, steams and drains for 1000 large cycles unattended

Model: NL-KFJ-6

The problem

An espresso machine dies at three places: the portafilter gasket, the steam knob and the boiler. Verifying them means loading, locking, steaming and draining dozens of times a day by hand with no consistency, and mains water hardness varies by season so scaling life differs by a factor of two between tests.

Capability

The machine tests espresso and drip coffee makers on two tiers of three stations, six in total. Espresso units get a pneumatic portafilter rotation mechanism (X and Y direction) and a steam knob actuator; drip units get a power key cylinder and a jug locating seat. The whole cycle runs unmanned: dosing 1-9.9L at 0.01L accuracy with automatic refill, pneumatic key press and heating, programme selection, automatic portafilter open and close, steam release triggered by the indicator signal, solenoid drain at 1-99.9s and fan cooling with adjustable time. Besides the solenoid drain, a vacuum extraction unit using compressed air removes residual water from glass jugs that cannot be tipped. Each station counts independently (1-999999) and a fault cuts that station only. Electrical monitoring covers 120V/1500W per unit, voltage and current at plus or minus 0.5 percent, current 0-20A, power 0.1-2000W, with audible and visual alarm on out-of-range values. Programs include the espresso sequence (three small cycles plus 20 minutes cooling as one large cycle, 1000 large cycles) and the drip sequence (run to thermostat trip, refill cold water, cool five minutes). Supply AC220V plus or minus 10 percent, air 0.5MPa from customer, about 1780x860x1780mm.

Key specifications

• Application: endurance and performance life tests of espresso and drip coffee makers
• Stations: two tiers of 3, six in total, independent control and counting
• Espresso motion: pneumatic portafilter rotation in X and Y, steam knob actuation on signal
• Drip motion: power key cylinder, jug locating seat, programme selection
• Dosing: 1-9.9L at 0.01L accuracy, automatic refill, 300ppm hard water supported
• Drain: solenoid drain 1-99.9s plus vacuum extraction unit for residual water
• Cooling: fan cooling with adjustable time
• Electrical: 120V/1500W per unit; voltage and current plus or minus 0.5 percent; 0-20A; 0.1-2000W
• Counters: 1-999999 cycles; dwell 1-9999.9s; heating 1-9999.9s
• Alarm: audible and visual on out-of-range, all-pole cut-off on station fault
• Environment and supply: 20-40C, 20-90 percent RH; AC220V plus or minus 10 percent; air 0.5MPa
• Size: about 1780x860x1780mm, aluminium profile with stainless tank

Applications

Coffee machine makers design validation and factory endurance sampling; gasket, steam valve and boiler supplier comparison; pre-certification life testing for UL and CE models; reproduction of leak and scale complaints

About the manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd provides non-standard customization, drawing confirmation, factory acceptance, on-site installation and commissioning, operation training and lifetime technical service; 12-month warranty and lifetime spare parts supply. Tel: 0760-88500902 / 13416787649. Web: en.zsnaili.com.