V-MAC (Virtual of Mechanical Engineering Article)

Analisis Miskonsepsi Mahasiswa Pada Matakuliah Fisika Teknik untuk Rekayasa Otomotif Melalui Pembelajaran Berbasis Kasus

2025-01-13T05:08:48+00:00

Penelitian ini bertujuan untuk menguraikan miskonsepsi mahasiswa pada pembelajaran fisika teknik. Miskonsepsi adalah pemahaman yang salah dan beralih arti dari konsep yang sebenarnya. Analisis miskonsepsi dilakukan dengan cara tes diagnostik berbentuk pilihan ganda berbantuan CRI (Certainty of Response Index). Jenis penelitian ini adalah penelitian kuantitatif dengan pendekatan deskriptif. Penelitian dilaksanakan di Program Studi Sarjana Terapan Teknologi Rekayasa Otomotif Jurusan Teknik Mesin Politeknik Negeri Malang Kampus Lumajang. Instrumen yang digunakan dalam penelitian ini adalah soal tes multiple choice berbantuan CRI dan lembar aktivitas pembelajaran berbasis kasus. Hasil analisis data menunjukan bahwa pada materi kinematika gerak terdapat beberapa mahasiswa yang mengalami salah konsep. Rata-rata miskonsepsi pada materi gerak vertikal sebesar 29% dan miskonsepsi pada materi gerak melingkar sebesar 31%. Beberapa faktor penyebab miskonsepsi mahasiswa adalah kemampuan akademik mahasiswa yang masih rendah, minat belajar yang kurang, dan cara belajar mahasiswa yang tidak tepat.

Kata kunci: Miskonsepsi, Fisika Teknik, Pembelajaran Berbasis Kasus

Analisis variasi rpm motor listrik terhadap variasi dimensi produk pada mesin pemotong bakso kotak

2025-01-13T05:06:01+00:00

In the food industry, the dough cutting process is needed to shape the dough as desired, such as square meatballs. Manual cutting of dough squares is done by cutting vertically and horizontally, but this method is time consuming. Therefore, mowers with electric motors are used for efficiency. Setting motor rpm is very important for optimal cutting results. If the rpm is too fast or slow, the results will not be appropriate. This research aims to find the right rpm range for a box meatball cutting machine. The research method was carried out by directly testing the machine at various conveyor motor rpm variations (2800, 2700, and 2600 rpm) and cutting motor variations (1400, 1350, and 1300 rpm) then measuring the dimensions of the resulting dough pieces. The research results showed that the combination of conveyor motor rpm of 2600 rpm and cutting motor rpm of 1350 rpm gave the best average cutting dimensions with a deviation value of 1 because at that rpm the conveyor and cutting knife had a speed difference that was not that big.

Analisis pengaruh variasi kecepatan motor induksi dan jumlah mata pisau terhadap kinerja mesin pencacah botol plastik

2025-01-13T05:06:38+00:00

The aim of this research is to determine the effect of variations in motor rotation speed and the number of blades on plastic bottle chopping machines, in order to help human work in recycling plastic bottles by finding the highest level of machine effectiveness, because along with technological developments in the field of mechanical engineering, humans think about how how to make a tool that can provide convenience, comfort, environmentally friendly, and so on. This research method creates a plastic bottle chopping machine that works by cutting plastic bottles into small pieces, using a flat type AISI 420 Stainless Steel knife, and as a driver a single phase AC electric motor with a maximum speed of 1420rpm. The results of this research are regarding the effectiveness of production results from plastic bottle chopping machines. This discussion and testing aims to obtain the following data: 2 blades (800rpm=96kg/day), (1100rpm=172.8kg/day), (1420rpm=192kg/day). For 4 blades (800rpm=134kg/day), (1100rpm= 211.2kg/day), (1420rpm=2429.6kg/day). And 6 blades (800rpm=153.6kg/day), (1100rpm=230kg/day), (1420rpm=288kg/day). The results of this data and machine will certainly really help operators in increasing the effectiveness of plastic bottle chopping machines.

Keywords: Blades Chopping, Machine Electric Motor, Plastic Bottle