Redesain Mesin Pengiris Singkong dengan Mekanisme Counterweight Gravity Feeder untuk Meningkatkan Produktivitas UMKM Keripik “Pak Ipul”. (Redesigning a Cassava Slicing Machine with a Counterweight Gravity Feeder Mechanism to Increase the Productivity of "Pak Ipul" Chips MSMEs).

Dewi, Wiranti Kusuma (2025) Redesain Mesin Pengiris Singkong dengan Mekanisme Counterweight Gravity Feeder untuk Meningkatkan Produktivitas UMKM Keripik “Pak Ipul”. (Redesigning a Cassava Slicing Machine with a Counterweight Gravity Feeder Mechanism to Increase the Productivity of "Pak Ipul" Chips MSMEs). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.

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Abstract

The Bojonegoro Cassava Chip MSME "Pak Ipul" has limited production capacity because the cassava slicing machine can only process 30 kg of cassava per hour. This studyaims to redesign the cassava slicing machine by improvingseveral key components such as the cassava inlet, cutting blade, frame,motor + reducer, and drive system. The redesign of the machine is based on anthropometric data of the operator, referencing body dimensions such as elbow height in a seated position (64,46 cm), polypteal height (40,85 cm), knee height (50,33 cm),distance from elbow to fingertip (74,66 cm), and hip width while seated (45,15 cm), to create an ergonomic and safe design for the operator. The newly designed machine has a production capacity of 60 kg per hour, which is more efficient than the old machine. The total cost of manufacturing the new machine is Rp 6.000.000, with raw material costs amounting to Rp 3.900.000 and labor costs of Rp 2.100.000. Test results showed a 50% increase in productivity, with a reduction in the time required to slice 75 kg of cassava from 2,5 hours to 1,25 hours. The depreciation analysis shows that the new machine has a longer economic life Depreciation analysis indicates that the new machine has a longer economic lifespan of 5 years, with annual depreciation of Rp 1.080.000, compared to the old machine, which only has a lifespan of 1 year. The Net Present Value (NPV) calculation for the new machine yields Rp 1.060.798,76, significantly higher than the old machine, which only yields Rp 24.235,45. Thus, although the initial investment for the new machine is higher, it provides greater long-term benefits and is worth investing in.

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