The top 10 skills of machine control design
upfront design can save designers' time and energy, and also reduce many troubles that will occur at the end of the machine life cycle. This paper introduces 10 very useful skills in machine control design
have you ever had such an experience: when using a machine and equipment, you will complain that engineers fail to fully consider the feelings of users when designing products. In order to help engineers design easy-to-use machines, this paper introduces 10 design skills from the aspects of automation, control, 3, overload automatic shutdown experimental instruments, sensors, logic devices and communication technology. Once they master these 10 skills, engineers can save a lot of time and energy in design, and avoid many troubles that may occur in the future
1. Investigate, research and quantify
collect information, make plans, and then move meticulously towards the established goals. This is a portrayal of the machine design process. In order to pursue a high degree of flexibility and adaptability of products, the prospect of industrial new energy vehicles will be 10 points broad. Engineers often spend a lot of time and energy in designing products, constantly adding new functions to products, but ultimately lead to excessive complexity of products
Michael gurney and ED Diehl, the founders of concept systems, an industrial system integrator, said, "in product design, once priorities are determined, we should immediately start from the most cost-effective place. Statistical analysis of process control and quality control is very useful information."
"modular machine design and manufacturing methods can meet the growing customized design requirements on the one hand, shorten the development time of the machine on the other hand, and reduce the manufacturing cost of OEM." Larry komarek, automation product manager of Phoenix Contact, said
komarek also suggested: "Decompose the machine or machine series into different functional components, and each functional component has corresponding machinery, automatic control components and software programs. By combining these functional components, you can create user customized configurations or 'small/medium/large' product series. Pre designed, pre documented and pre tested functional components can be produced quickly, and also reduce production costs."
2. Standards and safety
gurney and Diehl pointed out that with the help of the standard general interface, the product can integrate the best system components, while reducing the problems such as excessive waste of equipment in the special control system
the knowledge accumulated in the design software can be transformed into machine code, thus avoiding the modification of design parameters. Some design software provides data converters for step and IGES file formats. Step, the product model data exchange standard (ISO 10303), defines how to describe and exchange digital product information
"when designing distributed control, we should make full use of article 430.53 (c) of group motor installation provisions in NEC code. The advantage of this is that it can reduce the number of branch circuits, reduce costs, eliminate EMC noise, replace functional modules without rewiring and debugging, and enhance the flexibility of the product." Rich Mintz, electronic product manager of sew EURODRIVE, saidLarry Sunday, machine safety product manager of Schneider Electric Company, said, "in terms of safety, since the 2002 revision of nfpa-79, all general machine designs should comply with IEC category 4 standard. It is the highest standard of Safety specifications, requiring that all machine designs should take into account safety relays and safety interlock devices." At the same time, he said, "the 2002 revision unified nfpa-79 and IEC international standards. The common practice of Americans is to use standard relays in basic control circuits to ensure the so-called 'control reliability'. But for IEC category 4 standard, this is far from enough."
3. Sensors and machine vision
"don't consider the problem of sensors at the end of the design. Small intelligent sensors often bring unexpected benefits. When the space of the component base plate has been determined, a cheap and good sensor sometimes solves big problems", said Joseph dolinsky, technical marketing manager of banner engineering
mark sippel, in sight visual sensor product marketing manager of Cognex, pointed out that the way to deal with detection and process feedback depends on many factors
these factors include: does the feedback information need to be inspected and shared in multi-channel discrete detection, suppression or other systems when measuring PS? Is it necessary to have a controller responsible for the coordination of detection results and auxiliary tasks? How to exchange and use test results? If i/o devices are used for communication, what are the types of other control ports despite the rapid development of production capacity in the plastic flexible packaging industry? Where is the location? Factors such as lighting, power supply and data transmission also need to be taken into account
4. Rahul Kulkarni, product manager of the industrial data acquisition and Control Department of national instruments, said, "the first step in the long journey of machine design is to correctly select a logic platform. Now the commonly used controllers are PLC, PC-104, PCI, PXI or conventional circuit boards. Before deciding which controller platform to use, we must fully consider all the functions that the controller will perform (such as logic control, process control, motion control, automatic detection, machine status monitoring, etc.)
programming tools should be easy to master, and the generated code should be modular, easy to upgrade and reusable. Dan Seger, the global OEM technical consultant of Rockwell Automation, said, "choose a control architecture solution to make the design simple. From controller and network technology to peripheral equipment and operator interface, if you only consider the selection of these components from the perspective of the lowest procurement cost, it will bring trouble to later development. Similarly, good connectivity (such as compact assembly and close communication of various equipment components) It can improve efficiency and reduce costs. On the contrary, if a cheap device communication scheme is adopted in the design, it will not only be difficult to use, but also spend a lot of time in the project initiation and maintenance stages. " In order to achieve the best results, he suggested that control and information sharing should be combined
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