The digital control lathe is referred to as the CNC lathe, which is a control technology that applies digital computing technology to lathes. It expresses various control information in the machining process with coded numbers and inputs them into the numerical control device through the information carrier. Through the arithmetic processing, various control signals are issued by the numerical control device to control the movement of the lathe, and the parts are automatically processed according to the shape and size required by the drawings. The CNC lathe of small CNC lathe manufacturers solves the problem of complex, precise, small batch and multi-variety parts processing. It is a flexible and high-efficiency automatic lathe, which represents the development direction of modern lathe control technology. A typical mechatronic product.
"Accuracy" is used to describe the accuracy of the physical quantity, which reflects the error between the measured value and the true value, and the "resolution" is used to describe the division of the scale, which is reflected in the numerical reading process. Small change value read. Jane metaphor: A common scale with a scale of 10 cm, with 100 scales on it, can read the effective value of 1 mm. Then we say that the resolution of this ruler is 1 mm, he can only read the value of 1, 2, 3, 4...100; and its actual precision is unknown, because it is read by this ruler. 2 mm, we don't know the error between him and the true absolute 2 mm. And when we use fire to bake it, and stretch it for a while, then look at it. It's not hard to find that it has 100 scales, so its "resolution" is still 1 mm, just like the original! However, its accuracy has apparently changed.
For the encoder, the "resolution" is not only related to the number of lines, but also due to the influence of the electrical signal. It is adjustable and controllable, which can be changed as the signal is subdivided. The higher the subdivision factor, the smaller the resolution, but the higher the subdivision factor, the greater the error introduced. The accuracy is more biased towards the mechanical aspect. After a product is produced, its accuracy is basically fixed (some high-precision products can compensate the signal to improve the accuracy). This value is detected by it. The comprehensive performance of the workmanship and materials of the product is closely related. It is difficult for us to calculate a specific value as the basis for accuracy. Most of them can only judge the accuracy in the process of use.
Rather than subdividing to get a small resolution, the better, because the subdivision will introduce errors and expand the error, excessive subdivision will not guarantee accuracy! How many times the subdivision is needed, how many times the subdivision can be achieved, the premise must be based on the accuracy of the guarantee, because the accuracy of the invisibility before use and high-power subdivision is irresponsible. The higher the quality of the code disc, the better the reticle, the better the signal quality signal, and the smaller the error generated after subdivision, which is affected by the comprehensive performance of an encoder, which is why it will be under the same parameters. There are different reasons for different brands and different price encoders.
