Step 1: Check the power cord and contacts.
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Mechanical inspection: Examine the bolted connections of the phase wire, neutral wire, and especially the ground wire (PE) to ensure they are secure.
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Continuity testing: Use a multimeter to check the continuity of the system.
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Insulation test: Inspect the motor at the inverter by measuring the voltage, voltage, and current (U, V, W) between the U, V, and W wires, and each wire against ground to ensure there is no short circuit to the casing.
Step 2: Turn on the power switch and check the parameters.
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Protection check: Check the condition of the circuit breakers (CPs) or fuses that protect the heating element.
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Voltage specifications: Before switching on the main power, measure the voltage to ensure that the voltage between the phase wires is 380V and the voltage between the phase wires and the neutral wire is 220V .
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Screen startup: After closing the CP, observe the startup screen. If there are any error warnings, address them immediately. Ensure that the electronic gauges are displayed stably.
Step 3: Check the heating system.
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Temperature setting: Set the temperature appropriate for the type of plastic being used.
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Important note: After the screw barrel reaches the set temperature, it must be kept at that temperature for at least 30 minutes before operation. This allows the plastic to melt completely, reduces internal friction, and protects the lifespan of the screw shaft.
Step 4: Check operating conditions
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Check the safety conditions around the machine before starting it.
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Inspect the hydraulic oil system, lubrication oil level, and coolant system.
Steps 5 & 6: Manual operation and final check
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Perform the operations in manual mode to check the movements of the mold, screw, and jig for smoothness or any unusual noises.
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Check all other technical conditions before switching to automatic operation mode.