Implementasi Load Cell Sebagai Umpan Balik Sistem Kendali Gaya Tekan Pada Rancang Bangun Alat Pres Modul LED AC Di Vocalite

Abstract

The process of installing AC LED modules into the housing in Vocalite requires sufficient pressure to lock the modules in place; however, excessive force can damage the plastic housing or electronic components. This study designed an Arduino Nano-based pneumatic press equipped with a load cell as the primary feedback for pressure. Load cell data is read via the HX711, while the WPT-83G pressure sensor is used to monitor air pressure. The Arduino Nano controls a relay and a 5/2-way solenoid valve to actuate the AirTAC SC 50 x 150 cylinder and halt the process when the force reaches the setpoint. Testing included power supply output verification, load cell calibration, pressure readings, characterization of the relationship between pressure and thrust force, and repeated testing on the AC LED modules. Test results showed an average load cell error of 0.26% and an average pressure sensor error of 0.52%. The actual thrust increased from 151.54 N at 1 bar to 380.09 N at 5 bar, while the theoretical calculation increased from 196.35 N to 981.75 N. In repeated testing with a target of 303.08 N, the system successfully deactivated the relay and retracted the cylinder in 20 out of 20 cycles. All samples had an installation depth of 5 mm with a range of 0 mm, and no visual damage was found. However, some of the force characterization data exceeded the load cell’s nominal capacity of 20 kg; therefore, validation using a higher-capacity force sensor is necessary for a more robust quantitative force analysis