Upfrontdesign can save designers' time and energy, and also reduce many troubles at the end of the machine life cycle. This paper introduces 10 very useful skills in the control design of machine lubricating oil and antirust oil
have you ever had such an experience: when using a machine and equipment, you will complain that engineers do not 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, instrumentation, 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 set goals. This is a reflection of the machine design process. In order to pursue a high degree of flexibility and adaptability of products, engineers often spend a lot of time and energy in designing products, and constantly add new functions to products, which eventually leads to excessive complexity of products
michaelgurney and eddiehl, the founders of conceptsystems, an industrial system integrator, said: "in product design, once the priority is determined, it should start from the most cost-effective place. Statistical analysis on process control and quality control is very useful information."
"modular machine design and manufacturing methods can meet the increasing 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." Said larrykomarek, automation product manager at Phoenix Contact
komarek also suggests that: "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 the production cost can be reduced."
2. Standards and safety
gurney and Diehl pointed out that with the help of the standard universal 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, namely product model data exchange standard (iso10303), defines how to describe and exchange digital product information
"article 430.53 (c) of the groupmotorinstallationprovisions in neccode shall be fully used in the design of distributed control. The advantage of this is that it can reduce the number of branch circuits, reduce costs, eliminate EMC noise, replace each functional module without re wiring and commissioning, and enhance the flexibility of the product." Richmintz, electronic product manager of sew EURODRIVE, said
larrysunday, machine safety product manager of schneiderelectric company, said: "in terms of safety, since the release of nfpa-79 revised edition in 2002, all general machine designs should comply with ieccategory4 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 also mentioned: "the 2002 revision unified nfpa-79 and IEC international standards. It is a common practice in the United States, but this unit adopts the imported alumina that can not be painted or coated in time for household appliances and automobile related products. It uses standard relays in the basic control circuit to ensure the so-called 'control reliability'. However, for ieccategory4 standard, this is far from enough."
3. Sensors and machine vision
"don't consider the problem of sensors at the end of 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 josephdol2, technical marketing manager of bannerengineering
marksippel, 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 shared among multiple discrete detection, suppression or other systems? Is it necessary to have a controller responsible for the coordination of test 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? Where is the location? Factors such as lighting, power supply and data transmission also need to be taken into account
4. Rahulkulkarni, product manager of the industrial data acquisition and Control Department of nationalinstruments, 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.)
the programming tools should be easy to master and the generated code should