German Knick encoder Knick model Knick price

Knick encoders use a photoelectric pulse generator synchronized with the spindle, transmitting synchronization via gears on an intermediate shaft at a 1:1 ratio. There is no direct mechanical link between the rotation of the CNC lathe spindle and the feed motion. To machine threads, the number of pulses given to the feed servo motor must correspond to the spindle speed; the spindle pulse generator serves to link spindle rotation with feed motion. A thread consists of continuous ridges and grooves of identical profile shape formed along a helix on a cylindrical or conical surface. Threads formed on a cylindrical surface are called cylindrical threads, and threads formed on a conical surface are called conical threads. Threads formed on the outer surface of a body of revolution are called external threads, and threads formed on the inner surface of a body of revolution are called internal threads. There are many methods for machining threads. When threading on a lathe, the lathe clamps the cylindrical workpiece with a three-jaw chuck and drives it to rotate at a constant speed. The lathe feed mechanism drives the cutting tool (standard thread cutting tool) to move in a straight line at a constant speed along the cylinder axis. The tool tip cuts triangular grooves into the workpiece surface to form triangular threads. During thread machining, there is a trajectory start point (A point, i.e., the tool entry point) and a trajectory end point (B point, i.e., the tool exit point). In the thread machining trajectory, sufficient acceleration entry distance δ and deceleration exit distance δˊ are provided to ensure thread quality and eliminate pitch errors caused by servo lag.

Knick encoder advantages

Encoder advantages: compact size, high precision, high inherent resolution, non-contact and wear-free; the same type can detect angular displacement and, with the aid of mechanical conversion devices, linear displacement; multi-turn absolute optical encoders can detect linear displacement over considerable ranges (e.g., 25-bit multi-turn). Long service life, flexible installation, rich interface options, and reasonable pricing. Mature technology widely applied domestically and internationally for many years. Advantages of magnetostrictive absolute encoders: moderate size, direct measurement of linear displacement, absolute digital coding, theoretically unlimited range; non-contact and wear-free, resistant to harsh environments, usable underwater up to 1000 meters; rich interface options, diverse measurement methods; acceptable price.

Knick encoder component differences

From single-turn absolute encoders to multi-turn absolute encoders. In an absolute rotary single-turn absolute encoder, unique codes are obtained by measuring the tracks on the optical code disk during rotation. When rotation exceeds 360 degrees, the code returns to the origin, which violates the principle of uniqueness in absolute encoding. Such encoding is only suitable for measurements within a rotation range of 360 degrees and is called a single-turn absolute encoder. To measure rotation beyond a 360 degree range, multi-turn absolute encoders are used. Encoder manufacturing employs clockwork gear mechanics: as the central code disk rotates, another set of code disks (or multiple sets of gears and code disks) is driven via gear transmission. This adds turn-count coding to the single-turn code to expand the encoder's measurement range. Such absolute encoders are called multi-turn absolute encoders. They also determine the code by mechanical position, ensuring each position code is unique and non-repeating without the need for memory. Another advantage of multi-turn encoders is that the large measurement range often provides ample margin, so it is not necessary to painstakingly find the zero point during installation; any intermediate position can serve as the starting point, greatly simplifying installation and commissioning.

Knick encoder hybrid type

Hybrid absolute encoders output two sets of information: one set detects magnetic pole position and provides absolute information functionality; the other set is identical to the output of an incremental encoder. An optical encoder is an angle (angular velocity) detection device that converts the angular input to the shaft into corresponding electrical pulses or digital values using photoelectric conversion principles. It offers advantages such as compact size, high precision, reliable operation, and digital interfaces. It is widely used in devices and equipment requiring angle detection, such as CNC machine tools, rotary tables, servo drives, robots, radar, and military target determination.

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