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Megatron 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 connection 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 is a continuous series of ridges and grooves of identical profile 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 are called internal threads. There are many methods for machining threads. When cutting threads 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 turning tool (standard threading tool) to move in a straight line at a constant speed along the axis of the cylinder. The tip of the tool cuts triangular grooves into the workpiece surface, thereby forming 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.

Megatron Encoder Introduction

A detector that outputs angular data within one motor revolution to an external target. Absolute encoders can generally output 360 ° with a resolution of 8 to 12 bits. Incremental encoders have a disadvantage: they lose axis position in the event of a power failure. However, absolute encoders do not lose axis position even if a power failure occurs. Various codes can be output, such as binary code and BCD code. Absolute encoders are more expensive, more precise, and larger than incremental encoders. The optical code disk of an absolute encoder has many light channel tracks. Each track is arranged sequentially with 2 lines, 4 lines, 8 lines, and 16 lines. At each position of the encoder, by reading the light and dark states of each track, a unique 2-bit code (Gray code) is obtained, ranging from the zeroth power of 2 to the n-1th power of 2. The absolute encoder determines the code based on mechanical position; it requires no memory, no reference point search, and no continuous counting. The position is read whenever it is needed. Absolute encoders have a measuring range and are suitable for use in certain special-purpose machine tools.

Megatron Encoder Working Principle

It consists of a photoelectric code disk with a central shaft, featuring concentric light and dark tracks. Photoelectric emitting and receiving devices read these tracks to obtain four sets of sine wave signals, combined as A, B, C, and D. Each sine wave has a phase difference of 90 degrees (relative to one cycle of 360 degrees). By inverting the C and D signals and superimposing them on the A and B phases, signal stability is enhanced. Additionally, one Z phase pulse is output per revolution to represent the zero reference position. Since the A and B phases differ by 90 degrees, the direction of rotation (forward or reverse) can be determined by comparing whether the A phase leads or the B phase leads. The zero reference position of the encoder is obtained via the zero pulse. Code disk materials include glass, metal, and plastic. Glass code disks have very thin tracks deposited on glass, offering good thermal stability and high precision. Metal code disks use direct light and dark tracks, are not fragile, but have limited precision due to metal thickness, and their thermal stability is an order of magnitude worse than that of glass. Plastic code disks are economical with low cost, but their precision, thermal stability, and service life are somewhat inferior. Resolution refers to the number of light or dark tracks provided per 360 degrees of rotation, also known as analysis division or simply the number of lines. It is typically 5 to 10000 lines per revolution.

Megatron Hybrid Encoder

Hybrid absolute encoders output two sets of information: one set detects magnetic pole positions with absolute information functionality, while the other is identical to the output of an incremental encoder. A photoelectric encoder is an angle (angular velocity) detection device. It converts the angular input to the shaft into corresponding electrical pulses or digital values using the photoelectric conversion principle. It features 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 measurement.

Weidou Intelligent Technology specializes in selling German Megatron rotary encoders, Megatron incremental encoders, Megatron absolute encoders, Megatron photoelectric encoders, Megatron magnetic encoders, Megatron shafted encoders, Megatron hollow shaft encoders, Megatron contact brush encoders, Megatron angle encoders, Megatron linear encoders, Megatron digital encoders, Megatron draw-wire encoders, Megatron position encoders, Megatron hollow bore encoders, and Megatron spindle encoders. Megatron products are original imports from Germany. Customers are welcome to inquire and place orders.