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Four-channel numerical control system ENDAT2.2 interface

A numerical control system and four-channel technology, applied in the field of numerical control machine tools, can solve the problem of waste of pins and chip logic resources, and achieve the effect of improving flexibility, scalability and integration.

Active Publication Date: 2013-06-19
中国科学院沈阳计算技术研究所有限公司
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AI Technical Summary

Problems solved by technology

However, most of the existing absolute encoder interfaces at home and abroad only support one data interface, which causes a waste of pin and chip logic resources. Therefore, it is very necessary to develop a multi-channel absolute encoder digital interface.

Method used

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  • Four-channel numerical control system ENDAT2.2 interface
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  • Four-channel numerical control system ENDAT2.2 interface

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] A four-channel absolute encoder digital interface based on ENDAT2.2, through the data transceiver circuit to send commands to the photoelectric encoder supporting the ENDAT2.2 protocol to read the position value and other information, and then the lower computer will obtain the information through the drive After being processed by the FPGA module, it is fed back to the host computer through the PCI bus. Such as figure 1 shown.

[0032] As the control core of the four-channel digital interface, the FPGA module sends commands to the photoelectric encoder through the data transceiver interface circuit, and at the same time receives the feedback data of the encoder, and transmits the feedback data to the host computer through the PCI bus, and the host computer encodes the photoelectric The control signal of the encoder is output to the a...

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Abstract

The invention relates to data acceptance of an absolute type encoder in the field of numerically-controlled machine tool, in particular to a four-channel numerical control system ENDAT2.2 interface. A 32-bit embedded type soft-core processor Nios II is used as a data processing core. ENDAT2.2 is an encoder digital interface protocol. Based on a system on programmable chip (SOPC), hardware design and corresponding driver design are finished. Control and data acquisition of an optical-electricity encoder are finished through cooperative work of a peripheral component interconnect (PCI) bus and a personal computer (PC) numerically controlled upper computer. Through test and verification, requirements of a high-grade numerical control system for motion control are met by high-speed performance and reliability of the ENDAT2.2 interface. The ENDAT2.2 interface is capable of timely providing accurate positional value and diagnostic messages for the numerically controlled upper computer.

Description

technical field [0001] The invention relates to the data reception of an absolute encoder in the field of numerical control machine tools, in particular to a four-channel numerical control system ENDAT2.2 interface. Background technique [0002] The traditional encoder interface used in CNC machine tool systems can only support the relevant communication protocols of incremental encoders. When the system is powered off during work, the position data is often lost because it cannot be saved in time. Due to the loss of position data after the power is turned on again, the system cannot continue to process the unfinished workpiece, resulting in a loss of production. Each position of the absolute encoder has a unique identifier, so there is no need to memorize data. Most of the existing absolute encoder interfaces at home and abroad only support one data interface, which causes a waste of pins and chip logic resources. Therefore, it is very necessary to develop a multi-channel ...

Claims

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Application Information

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IPC IPC(8): G05B19/18
Inventor 郑一麟林浒陶耀东郑飂默陈龙
Owner 中国科学院沈阳计算技术研究所有限公司
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