Computer technology development has an impact on manufacturing technology development. CNC Lathe machine is a combination of computer technology and mechanical technology. This technology produces precision manufacturing products and fast processing times. Computer Numerical Control (CNC) is a machine controlled using a computer program to simplify the machine work process and make product results more uniform and acurates. A researcher makes this CNC Lathe machine from the Department of Mechanical Engineering Tanjungpura University Pontianak. It is named Small CNC Lathe machine with specifications, two axes (X and Z), and it has small dimensions to make it easier to move. This Small CNC Lathe Machine uses a spindle motor of 1 HP, 1500 rpm and a torque of 3.5 Nm, to move the X and Z axes using two stepper motors with a torque of 0.76 Nm for the X-axis and 1.2 Nm for the Z-axis. It has a motion limit of 215 mm for the X-axis and 75 mm for the Z-axis. This research was conducted to obtain the accuracy and error of the dimensional product made in this machine. The results of 16 workpieces with four different types of programs ware the average error percentage rate of 1.840%, so that it has an accuracy level of 98.160% for the X-axis and the average error percentage rate of 0,396% so that it has an accuracy level of 99.604% for Z-axis.
This paper presents a robot concept which is the robot can play the instrumental Gamelan music. Gamelan is a percussive instrument. Instrumental Gamelan music keys are consist of 2 octaves in 15 tones. Robot Gamelan music is using proportional-derivative (PD) control system. PD control of the robot is by controlling DC gear motor position to desired Gamelan key position. Robot Gamelan music using ATmega 16 microcontroller as a controller. Feedback of PD control is using magnetic rotary encoder (MRE) sensor. PD control is using the constant. The constant functions of PD control are determining the pulse width modulation (PWM) toward DC gear motor velocity in order to reposition a gamelan key position and pushing down the errors.
Pondok Pesanren Islam Hidayatunnajah Bekasi Jawa Barat belakangan ini menjadi idola para orang tua dalam menitipkan anaknya untuk dibimbing, dibina, dan ditanamkan nilai-nilai akhlaqul karimah, golobalisasi menjadi tangtangan manusia dalam menempuh hidup di dunia sehingga banyak orang tua untuk mengamankan anaknya dari sikap yang jelek dikehidupan kaula muda. Penelitian ini bertujuan untuk mengetahui upaya orang tua menyekolahkan anaknya di pesantren, dan nilai demokrasi apa saja yang dapat tertaman dalam diri santri. Metode penelitian ini menggunakan kualitatif diskriptif. Hasil dari penelitian ini menerangkan bahwa banyak orang tua yang ingin anaknya diterima di berbagai pesantren dengan alasan kehidupan diluar telah tercemari arus globalisasi karakter barat, pergaulan bebas, nontonan yang tidak terkendali,tidak kenal haq dan bathil, fitnah, penghalang kebaikan dan nilai-nilai demokrasi yang tertaman dalam santri dengan kokoh,tegak dengan semboyang bisa ala terbiasa, itulah Pendidikan ala pesantren yang menjadi idola para orang tua.
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