CNC Milling machine
What is this CNC stuff anyway?
CNC stands for Computer Numeric Control and is usually attributed to any Numerically Controlled device. A CNC has been around since the early 1970's. Prior to this, it was called NC, short for Numerical Control.
Below you will find information on the electronics, motors, parts, plans, machines, kits, and distributors associated with building or buying CNC machines. If your looking for help, or you want to build a machine continue reading
Do you have a CNC machine?
What is (NC)
Numerical control (NC) refers to the automation of machine tools that are operated by abstractly programmed commands encoded on a storage medium.
Manual machines (moved by hand) opposed to numerically controlled machines (moved by computer) are operated using hand wheels or levers, or mechanically automated by means of pneumatics (Air) or gears.
What is a CNC Milling Machine?
A Milling Machine has three axis, one to move the spindle up and down, and two horizontal axis to move the part on two plains.. Milling machines are often classed in two basic forms, horizontal and vertical, which refer to the orientation of the main spindle. The Spindle is the part of the Mill that holds the tooling, sometimes it is a Dremel tool and others a pencil.
What is Direct Numeric Control?
A very good example of a direct numeric controlled (DNC) machine would be a sewing machine pre-programmed to perform the same pattern each time.
The operator simply loads the machine and hits a foot pedal for the machine to activate. Once started the sewing machine will sew one pattern, this is good for repetitious work a prime example would be the "Seat belt"
What is a CNC Breakout board?
A "Breakout Board" interfaces your computer with the outside world; it allows you to connect your computer to external devices like a set of lights, a switch, or a drill press. You can make your own or purchase breakout boards.
What is a CNC Driver Board?
A driver board is used to connect a motor to a breakout board, the breakout board interfaces with the outside world, the driver board connects to the breakout board to control stepper motors. Encoders can also be used to determine motor shaft location.
What is a CNC Power supply, how to select the proper power supply?
The power supply needed depends on the power required from the stepper motors; it is also reliant on what the breakout board requires. Most of the time two power supplies are used to run a machine, one for the breakout board one for the motors.
What is CNC backlash, What is Backlash, how do you eliminate it?
Backlash is the movement found in lead screws, nuts when they are loose on a bolt or ready/ rod. Sometimes it is almost not noticeable to the naked eye or by feel but it can influence the item your cutting. Backlash does not compound over distance.
What is a CNC phase converter?
A phase converter is used in machines powered by a dc motor, stepper motor info is available below, the phase converter provides smooth power to the motor, it protects electronics and provides a smooth sine wave.
What is a CNC machinist and what does a machinist do?
A CNC machinist is a person who controls and operates a CNC machine; they load parts, unload parts, and calibrate the machine. Some even program the machine.
What is a CNC Open loop and closed loop system?
A closed loop system, and an open loop system, what the difference is and what you should use.
a closed loop system uses a feedback system to operate, usually a dc setup. Open loop is usually a stepper motor setup; no feedback is provided to the computer.
What is a CNC PLC?
A programmable logic controller is still used today; most people just use a pc to operate a CNC these days. Thanks to some programs known today.
What is a CNC Stepper motor?
The most common motor used in CNC machines is the stepper motor, there are three kinds of stepper motor, but most today are hybrid. Contained here you will find lots of data on the motor, including history, benefits of each kind, the math behind operation, and how to control them.
What is a CNC contactor?
DIY CNC Lathe
This lathe is in the process of being constructed. Updates will follow as the construction progresses, the spinal motor used and now fiber glassed to a steel frame is out of a blower. Stepper will cut and feed the material.
What is a CNC limit switch?
There are many different kinds of limit switches, some are electric and others are mechanical you can even find wireless limiting switch. So why is it called a limit switch?
An encoder is a device used to measure the location of a shaft, it is used in a closed loop system and is based on an initial reference point. They are used in very precise applications.
A 3D printer is a machine that melts plastic and forms a part from the melted plastic. You can get a 3D printer running with a single Arduino open source micro controller board and a couple of driver boards.
Many different machines exist today, some are very expensive and others are very reasonable in fact you can even build your own for less than a thousand dollars (for a parts list). A good open source printer is the Rep-Rap 3D printer this printer is open source and everything you need to build your own can be found at the Rep-Rap wiki
For another source of information try Tech News
Or wikipedia.org/wiki/Numerical_control .
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