They contend that automating the cutting process brings profits and that customers want accurate parts, with less waste, less labor and shorter lead times. Technological advances There is more upbeat news in CNC technology. Experts observed that advancement in software, the 4 and 5 axis capabilities, and other related technological progressions are born faster and that the machinery is getting more versatile. Samples of specialty routers are engraving machines, 3D engraving machines and PCB routers. The PCB router is used to create circuit boards. Several CNC features would include having separate heads. CNC machines that have multiple heads mean that there can be two programs running but it is controlled with one user interface. CNC machine allows the operator and manufacturer to see a printed image of how the processed wood work would look like. The CNC operator can check the designs or make necessary adjustments before running the machine, this would help them avoid possible errors. Intricate and delicate designs would no longer entail too much labor, it would be replicated easily, with accuracy and precision using the CNC routers and machines. If the first part was programmed using G41 and climb milling, machining the mirrored part needs at least an extra 0.01 to the rough cutter. The reason is that on the mirrored part you will be doing conventional milling. This is where the cutter tends to go into the finished surface. Machining both ends Sometimes, a job requires you to machine both ends of a part held on a vise and you also need to try using one of the tools for the stop. There are also CNC router kits and plans. However, some builders feel that following the directions, exactly as they are, fails to meet their needs. Since they have to follow the plan, considerations in designs and sizes (or whatever the builder needs or wants) may not be accommodated by the plan. This would leave builders operating with CNC routers that they do not want or need. Would a CNC machine be a good investment nevertheless? Standard manufacturing concepts stated that machines should be operating at all times for maximum efficiency. That mindset was changed when the router they purchased became operational and produced in a few hours what their employees took two days to make.