A double-sided grinder is a machine grinding device consisting of two rotating faces that rotate each clockwise. The first spinning face is commonly referred to a fixed face, the other spinning face is called a variable-face grinding face, which contains an adjustable auger for grinding or milling accessories, and a grip extending above the hand for grasping large chunks of material. In some cases, a single-sided grinding face is used in place of the variable-face grinding face. A chuck or blade assembly allows the use of interchangeable grinding blades on both the fixed and variable-face grinding machines.
The workpiece to be ground is attached to the grinding machine with a chuck plate or slide. The sliding plate, which includes a grinding wheel and grinding surfaces, is slid along a preset path inside the chuck, and the grinding components are held in place by clamps. The two faces of the double-sided grinder may be aligned in succession by manually sliding each component of the workpiece against the adjacent face in a separate commissioning face. Alternatively, the alignment of the face may be automatically aligned using one or more hydraulically controlled alignment bars.
A popular type of double-sided grinder is the dongle-type device, which attaches directly to a computer or other device via a USB port. Dongle devices allow users to precisely grind fine and detailed pieces, including small woodturning bits. They are designed to be used with handheld and medium size woodturning tools, but can also be used on larger workpieces. The latest technology enables the user to manually align the grinding faces in either a clockwise or counterclockwise motion. Some dongle models are equipped with a magnetic head, which allows for a greater degree of precision than magnetic fences. The two types of fences are most often found in digital grinders; they have comparable results and perform in nearly identical ways.
Another fine grinder used in home grinders is the double-sided blade grinder, which utilizes two spinning blades to grind fine materials. The best performance is achieved with modern diamond cutting machines; however, the blade alignment can still be manually adjusted using potentiometers. The best grinders use two of the latest technologies: high-speed electric motors and computer controlled microprocessors. The high-speed motor is capable of providing extremely high velocities, which allows the blade to rapidly grind both sides of the material at once. The computer is capable of adjusting the speed and other parameters simultaneously.
The latest technology used in these fine grinders is the pc-based programmable variable geometry (PCG) grinding system. This unique grinding method incorporates both a cutting tool and a computer chip that is designed to automatically adjust based upon the type of material being worked with. In addition, the chip is capable of performing the diverse functions of the cutting tool, such as drilling, routing, grinding, etc. The most noticeable benefit of utilizing this technology is the nearly intuitive operation. This grinder is very similar to a large coffee maker; therefore, all that is required is a single command, which tells the machine to grind. It is capable of adjusting the temperature, speed, force, center grind, travel speed, temperature, and even the timing of the blade rotation.
A high-precision direct contact measuring system includes high-speed infrared (IR) light energy delivered via a computer circuit to the inside surface of the material being printed. The computer reads the heat flux from the inside of the material and precisely positions the contact. High-precision continuous flow grinding or CFCG is performed by using a small pump that is controlled by a variable pulse width modulation that precisely controls the flow rate and temperature. The integrated circuit also controls the timing of the grinding blade rotation and thereby provides accurate, high-precision grinding results.
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