Minimal surface roughness value is the performance to be achieved in the process of CNC NLX 2500, is necessary to regulate variables NLX 2500 CNC process in order to obtain the proper response surface roughness of the workpiece is minimal.research that has been done is to determine the contribution of these variables NLX CNC process in 2500 to reduce the variation of the response surface roughness of the workpiece simultaneously. Moreover, it also made the determination that the proper setting of the variables NLX2500 CNC process in order to obtain the surface roughness of the workpiece is minimal.machining process variable is varied spindle rotation, motion eat, and in the funeral. The experimental design is determined based on the Taguchi method and form of orthogonal L9 (33). Optimization method is used Taguchi. The randomized trial with replication 2 times to overcome interference factors that occur during the machining process.the results showed that to reduce the variation of the response simultaneously, eat motion has the largest percent of the contribution, which amounted to 99.48%, spindle rotation has a percent contribution of 0.0974%, the feeds have a percent contribution of -0.126%.to obtain a surface roughness of the workpiece is minimal, spindle rotation is set at 2748 rpm, eating motion is set at 0.15 mm / rotation, the funeral was adjusted to 0.5 mm.

Minimum surface roughness results are a desirable objective in the CNC NLX 2500 Y process, a precise adjustment of CNC NLX 2500 Y process parameters should be obtained in order to obtain minimal roughness of the workpiece surface. The research has been conducted to determine the contribution ofCNC NLX Y 2500 process parameters to reduce the variation of the work surface roughness response simultaneously. And the determination of the exact setting of CNC NLX Y 2500 process parameters in order to obtain minimal roughness of the workpiece surfaces. parameters of machining process are variedspindle rotation, cutting speed, the dept of cut. The experimental design is based on the Taguchi method and is an orthogonal matrix L8 (2³). The optimization method used is Taguchi. The experiment was conducted randomly with replication 2 times to overcome the disturbance factor that occurred during machining process. The results showed that to reduce the variation of the response simultaneously, the the dept of cut has the largest contribution, that is 82.6%, the spindle speed has a contribution percentage of 61.9%, the cut rate has a contribution percentage of 9.2%. To obtain a surface roughness of the workpiece is minimal, the spindle rotation is set at 2866 rpm, the cutting speed is set to 0.40 mm / rotation, the dept of cut is set to 1 mm.

Community service activities( PKM) carried out in collaboration with soy milk business partners in Parit Padang Village, Sungailiat District, Bangka Regency, Bangka Belitung Islands Province. The production process carried out by partners still uses manual methods with simple equipment so that to make soya milk in the amount of 3 kilogram takes approximately 30- 60 minutes. The purpose of this activity is to assist partners in increasing the productivity of soya milk businesses. Through this (PKM) activity, it is expected to improve the performance of partners in soya milk production. This (PKM) activity is carried out through several stages, namely: survey of partner problems, procurement of soybean grinding machines, and brief training on machine operation and maintenance. This program runs well and smoothly with training and assistance to partners. After this activity, partners get appropriate technology in the form of machines and maintenance services if the machine experiences problems or damages and there is an increase in the quality and quantity of soya milk production with an increase in production capacity of 6 kilogram per hour.

The development of various processed cassava with good quality will support local government programs in realizing food security through the development food diversification of local, namely cassava. This Community Partnership Program (PKM) activity is the Ubi Flour Processing Business Group in Tempilang Village. The sweet potato flour produced is made of processed products such as aruk rice, sweet potato noodles, and cakes. From the survey and analysis together with partners, the problems faced by partners, namely regarding production problems related to increasing production capacity and aspects of business management. So far, the process of the production stage is done manually which requires a lot of manpower and time so that it is less productive. From these conditions, the solution taken is first to procure a cassava flour squeezer which has a function to squeeze the sweet potato flour with the help of a threaded shaft drive system and a hydraulic pump with a tool capable of 5 Kg at a time, second is to carry out training on machine operation and maintenance so partners understand about the use and maintenance of tools properly and correctly, and third is to evaluate and monitor partners to measure the success rate of production problems, whether there has been an increase or not. During monitoring, before the press, the production process takes 30 minutes to produce 5 kg of sweet potato flour. However, with the squeezer it takes only 5 minutes to produce 5 kg of sweet potato flour.

Fused Deposition Modeling (FDM) is a technique of 3D Printing machines that is popularly used to print products. The printed product certainly has the ideal tensile strength characteristics if it has a precise size and good shape according to the standard. One of the materials that can be processed in a 3D printing machine is ST PLA. Research in terms of tensile testing has been carried out on PLA/ABS materials. However, tensile testing with annealing process using ST PLA filament is still very rarely done. From these problems, it is necessary to research to obtain optimal process parameters on 3D printing machines, to obtain the highest tensile strength from the annealing process using ST PLA material. This research was conducted using a 3D printer DIY Prusa model with a printing area of ​​XYZ, 300 mm x 300 mm x 350 mm. The material used is ST PLA filament with a diameter of 1.75 mm in green. The process parameters in this research are layer thickness, nozzle temperature and flow rate. For annealing media use beach sand, coffee and wheat. The shape of the test specimen follows the ASTM D638 type IV standard. As for the design of the process parameters using the Taguchi L9 method (33). The process parameter values ​​that produce the highest tensile strength without annealing are layer thickness 0.3 mm, nozzle temperature 205oC, and flow rate 100%. The annealing process parameters that produce the highest tensile strength are annealing time of 15 minutes, oven temperature of 110oC, for annealing media using coffee.