Several efforts to improve the efficiency and effectiveness of slicing cassava machine had been conducted. One of them including the development of a prototype cassava slicing machine. This machine has types and classification based on slicing capacity. The purpose of this study was to conduct a machine performance test (verification test, performance test, and ergonomics test), to compare its performance with SNI 0838-1:2014, to analyze the constraints of a vertical cassava slicing machine. A quantitative research approach and descriptive explanatory method were used by observing, measuring, and calculating, the testing of cassava slicing machine. Verification test was to check the suitability of the type and type of engine, motor, transmission type, slicing unit, engine frame, and other supporting components in accordance with the specifications. The performance results of the slicing machine displayed that its capacity was 18.51 kg/hour and performance efficiency of 74.05%. The slicing test obtained an average thickness was 0.73 mm, uniformity level of 64.2%, and damage rate around 9.67%. Ergonomics tests showed that the machine was quite in accordance with the comfort of the operator. There were some obstacles that need evaluations such as the difficulty in adjusting slicing blade, transmission, and technical specifications of the cassava slicing machine. Therefore, the cassava slicing machine needed improvement so that it conforms to the requirements that refer to SNI 0838-1:2014.  Keywords: cassava, performance test, slicing, slicing machine, testing

Shallot is widely used in daily life. Its demand tends to increase even though Indonesia is still facing global pandemic due to Covid-19 outbreak. Before processing, its outer layer should be removed. However, it is time and energy consuming. Therefore, a shallot dehuller machine with theoretical capacity of 20 kg/h was manufactured to increase peeling capacity. Various tests were conducted to examine the machine performance. The objectives of the research were to conduct performance test by identifying and evaluating mechanical aspects and providing recommendations after the tests concluded. An explanatory descriptive analysis had been chosen to observe, measure, and calculate the data. Results of performance test indicated that while the actual capacity was 14.52 kg/h, its efficiency was 71.44%. The shelling yield was around 36.29%. During the test, the noisiness also measured which was about 88.4 dB. Moreover, motor and engine vibration were also measured. The results were 6.48 and 6 Hz of motor and engine vibration (without load). Furthermore, motor and engine vibration with load were about 5.96 and 5.56 Hz, respectively. Machine performance was relatively moderate. On the contrary, due to low shelling yield, further modification is needed to achieve better results.

Pengupasan bawang merah pada usaha industri kecil masih dilakukan secara manual sehingga memerlukan banyakwaktu dan tenaga. Oleh karena itu, diperlukan mesin pengupas bawang merah yang kebutuhan listriknya rendah dan mudah digunakan. Penelitian ini bertujuan untuk melakukan kegiatan pabrikasi mesin pengupas bawang di PT Bahagia Jaya Sejahtera dengan menggunakan konsep desain dan pabrikasi mesin. Alat yang digunakan merupakan peralatan perbengkelan yang menunjang pembuatan mesin pengupas bawang. Adapun bahan yang digunakan adalah pelat baja tahan karat dan besi siku. Proses produksi berlangsung setelah proses desain selesai dan rancangan mesin telah disetujui. Proses produksi meliputi kegiatan pembuatan rumah pencacah, unit pengumpan (inlet), unit pengeluaran (outlet), dan rangka mesin. Setelah itu, semua bagian mesin disusun dan dilakukan kegiatan finishing. Sebelum mesin tersebut didistribusikan, dilakukan uji fungsional alat untuk mengetahui performa mesin tersebut. Hasil uji fungsional dilakukan tanpa beban dan dengan beban. Hasil uji tanpa beban menunjukkan bahwa setiap bagian mesin bekerja dengan baik. Hasil uji fungsional dengan beban menunjukkan bahwa perlu beberapa perbaikan komponen untuk meningkatkan kemampuan mesin pengupas bawang.

The development of coffee production needs to be supported by technological readiness, so that appropriate agricultural tools and machines (alsintan) are needed in the post-harvest processing of coffee. This study aims to identify the design drawing of a dry coffee grinder, produce a dry coffee grinder, and perform a performance test of the BEJE GLK 20 type dry coffee grinder. The research method used is a qualitative approach using a description method that explores and examines in depth the process activities. dry coffee grinder production. The manufacturing process for the dry coffee grinding machine has been successfully carried out by following the design that has been made and the stages in accordance with the machine design rules. The results of the dry coffee grinding power analysis with a power of 0.835 kW (1.12 HP) obtained a coffee grinder tooth capacity of 8.76 kg/hour from a total output capacity of 58.2 kg/hour.

Shallot peeling activities in small scale industry are still manually done. This process takes huge time and effort. Therefore, shallot dehuller was designed and developed to increase effectivity and efficiency. The objectives of the study were to develop shallot dehuller machine and conduct functional tests. Identification tests indicated workshop tools needed for machine development were grinder, rulers, scales, and various machines such as drilling, welding, roll and bender, and cutting plasma machine. Machine development started from manufacturing the frames, dehuller hopper and inlet, rotating disc, outlet for shallot hull, and outlet for shallot. Functional tests indicated that the machine construction was according to the design plan.