Teknika STTKD: Jurnal Teknik, Elektronik, Engine

RANCANGAN MONITORING ALARM TRANSMISSION OIL LEVEL PADA GEARBOX RADAR BERBASIS ESP8266 DENGAN NOTIFIKASI TELEGRAM

2026-01-07T11:19:57+07:00

Radar (Radio Detection and Ranging) is a critical tool used by AirNav Indonesia for surveillance services. Regular maintenance of radar equipment, including daily, weekly, monthly, and annual inspections, is essential to ensure operational reliability. This study aims to design and implement a real-time oil level monitoring system for radar gearbox units using an ESP8266 microcontroller and the Telegram messaging platform. The system utilizes a TCRT5000 optical sensor to detect oil levels and triggers an alarm when the level falls below a predefined threshold. The data is processed by a NodeMCU and transmitted via Wi-Fi to notify users through Telegram. System performance was evaluated through simulated variations in oil level, successfully generating real-time alerts. The proposed monitoring system enhances preventive maintenance efforts and helps reduce the risk of gearbox damage

ANALISIS UMUR PAKAI (LIFETIME) BEARING 6207 KNCG PADA KOMPONEN TAKE OFF ROLL MESIN TEXTURIZING MURATA 33-H DI PT. XYZ

2026-01-07T11:33:14+07:00

The textile industry plays an important role in the national economy, especially in absorbing labor and contributing to foreign exchange through export activities. One of the crucial processes in the textile production chain is yarn texturization, which greatly determines the physical and aesthetic characteristics of the yarn as the final product. PT. XYZ is a textile company that produces polyester-based textured yarn using a Murata 33-H type texturizing machine. This machine operates continuously at high speed and is highly dependent on the reliability of its mechanical components, one of which is the 6207 KNCG type bearing installed on the Take Off Roll section. Bearings function to support rotating shafts with high loads and speeds, so they are very susceptible to wear. Bearing failure can cause production downtime, damage to other components, and decreased product quality. Therefore, a predictive approach is needed in maintenance by analyzing the bearing lifetime theoretically. This study aims to calculate the estimated bearing lifetime and prepare a replacement schedule and appropriate preventive inspection to support smooth operations. The analysis results show that the theoretical lifetime of the 6207 KNCG bearing reaches 4.354,1 hours or around 181.6 operational days. Considering the safety factor, a replacement schedule of every 3.487,2 hours is recommended. In addition, routine inspections are carried out periodically to detect early signs of damage. This strategy is expected to improve machine reliability, maintenance cost efficiency, and production continuity at PT. XYZ.

STUDI KEKUATAN TARIK KOMPOSIT SERAT JERAMI PADI YANG DIBUAT DENGAN METODE VACUUM BAGGING

2026-01-19T18:50:11+07:00

This study aims to determine the effect of rice straw fiber orientation on the tensile strength of composite materials manufactured using the vacuum bagging method. The composites were made using rice straw fibers arranged in two orientations: parallel and random, with epoxy resin as the matrix. Specimens were produced according to ASTM D638 Type 1 standards and tested using a tensile testing machine. The results revealed that fiber orientation significantly influences tensile strength. The parallel fiber specimens achieved an average tensile strength. The parallel fiber specimens achieved an average tensile strength of 22.54 Mpa, significantly higher than the random fiber specimens which only reached 1.68 Mpa. The tensile strength difference between the two orientations was 20.86 Mpa. The tensile strength difference between the two orientations was 20.86 Mpa. It can be concluded that parallel fiber alignment provides better mechanical performance, making it more suitable for structural applications that require high tensile strength.