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  • Записи с меткой ‘load’

    Your dishwasher’s guardian angel

    Your dishwasher’s guardian angel

    If you have an older 3 Phase dishwasher it is most likely that your wash motor is not protected very well…

    What I mean is that there are a couple smaller parts which control the motor and they easily can become faulty. When they go faulty you may not even notice, but the motor will. And the damage begins. You will keep on using the dishwasher without major faults thinking that everything is ok, but the motor inside will be getting hotter and hotter and eventually it will give its last breath.

    Well, then nothing else can be done except to get a new motor in. And this can cost easily up to a 1/3 of your dishwasher value.

    But if you smart enough, you can avoid all that by simply getting a technician to check it out and see if the motor has got one of these: Control relay RSTB

    What does this relay do?

    Electronic timer is designed to monitor 3-phase supplies and to protect motors and other loads against the faults listed below.

    · Monitoring of rotational direction of phases

    · Detection of complete failure of one or more of the phases

    · Undervoltage detection (-10%)

    · Overvoltage detection (+10%)

    · Detection of phase asymmetry (imbalance) (±10%)

    The relay operates if any of the conditions occurs.

    The relay releases if any of the conditions fails.

    There is a Time Delay between the relay action and the condition occurs (except rotational direction of phases error ) to avoid very short interruptions or other momentary failures.

    A selector switch allows selection of an adjustable time delay from 0.1s to 10s.

    When the supply returns towards its rated value, the relay is re-energized according to the hysteresis value (5%).

    So just by having one of these, which cost only a fraction of a new motor price, you can avoid a big breakdown, big bill and huge losses for your business.

    ACT NOW!!! Every day you hold over may be crucial to your machine, get it checked, get one installed and have a peace of mind.

    The Not So Ingenious Side Of Industrial Design

    The Not So Ingenious Side Of Industrial Design

    When it comes to industrial design, there has been some of the best inventions the likes of you and I would never dream of. From engines and machinery to vehicles and everyday stuff that makes life so much easier, such as can openers.
    However, there are people that sit and come up with ideas that call themselves geniuses, designers, inventors and it makes you wonder how they ever got this idea about themselves. It also makes you wonder how some of these ideas ever got past manufacturers and testers and out onto the open market. But what type of industrial design would bring about such scorn?
    Well, fridge design is not something we give much thought to. We buy one that fits, we plug it in, fill it full of our favourite munchies and forget about it. However, what happens when we go to load in our weekly shop and open our box of six eggs to put in the specially shaped tray and find it only has room for five? Everybody knows that eggs come in boxes of six so why oh why would a manufacturer put in a holder for five? Bosch did!
    Zanussi brought out their product of industrial design in the form of a washing machine that automatically washed synthetics at 60 degrees. Not such a great design and a wonder that nobody noticed before it went on sale. All synthetic garments come with a recommendation to wash at 40 degrees, this is standard, so what is the point of an automatic setting, supposedly to save time, that is wrong?
    Staying in the kitchen of useless industrial design, we have the Kenwood dishwasher who’s spray arm was prevented from working once normal sized dinner plates were put inside. If the spray arm cannot move then dishes on the top shelf cannot get washed, kind of defeating the object somewhat! I suppose if you have such limited dishwashing capabilities you might as well buy a table top dishwasher. As long as it’s not the the Carlton table top dishwasher which cannot fit standard size mugs inside.
    LM Tech’s battery heated gloves should be a good idea if only they heated the whole hand. However, they only heat a small part of the hand which is pretty pointless!
    The control knobs on the Elba gas oven overheat and Hotpoint produced a larder fridge without a light.
    A television has also been released onto the open market that won’t switch off. The plug has to be removed from the wall before the TV can be turned off and how many people want this inconvenience? Uni media have brought out a TV that, when you try to adjust the picture, the picture adjustment box covers the entire screen so you can’t see what you are doing.
    Whatever you do, do not buy your child a yellow slide! The Easy Store Large slide, in a delightful shade of bright yellow, disappears in summer for the weight of bugs that are attracted to its colouring.
    So where is the quality control of these products? If the basic quality of a product is so poor can we be sure about its safety or will that be lacking in quality too? Product reviews are a good way of finding out whether a product does exactly what is says on the tin or not and are well worth researching before you delve deep for anything.

    Qc Software Wcs Outlined in Dc Velocity

    Qc Software Wcs Outlined in Dc Velocity

    According to Jerry List, vice-president of Cincinnati-based QC Software, “The WCS evolved for food distribution because the warehouse management system was just trying to do too much and technology just couldn’t keep up. Routing, sorting and processing cartons through a conveyor system are very different than tracking inventory and orders.”

    According to manufacturing journalist Thomas R. Cutler in a recent issue DC Velocity, “WCS technology solutions provide information used to ensure efficient operation of scheduling, picking, loading and delivery, thereby reducing costs and increasing customer satisfaction levels. Many WCS systems provide real-time access of a common database, continually apprising the operations staff of the status of order processing, enabling compression of the customer order cycle. Scheduling of staff, loading docks and equipment are optimized by the on-line capabilities and comprehensive reporting offered in most WCS shipping control modules.”

    A leading distributor of food and foodservice products uses the QC Enterprise WCS which provides case and pallet routing for the state-of-the-art distribution system. The pallet system consists of 9 aisles of high-rise (100 feet high); double-deep Automated Storage/Retrieval System (AS/RS) cranes interconnected with a pallet handling conveyor system. The WCS automatically routes pallets to the designated aisle for put-away. The WCS also receives other commands from the WMS including stock rotation, pick aisle replenishment, and full pallet shipping transactions. The WCS is responsible for managing the overall activity of the cranes to obtain the highest level of utilization.

    The solutions provided by QC Software (www.qcsoftware.com) enables companies to streamline their warehouse operations with the lowest total cost of ownership in the industry ensuring increased corporate profitability. With a commitment to total customer satisfaction QC Software is the obvious choice for warehouse control, order management, and inventory management needs.

    Rfid Remodels Supply Chain Management

    Rfid Remodels Supply Chain Management

    Can you imagine 100% visibility of product in a Supply Chain with RFID tags to whole warehouse? RFID is major advancement in supply chain management. Although large range of applications supported by the radio-frequency identification technology, now supply chain management is on its focus. RFID is taught as the ultimate Supply Chain solution that will drive millions if not billions of savings throughout the supply chain and other areas. The question in the air is: Does RFID really has this “healing” power? From the ordinary process, such as moving goods through loading docks, to the complex, such as managing huge amount of data as information about goods is collected in real time makes RFID as an ultimate supply chain solution.
    The way we handle products in the Supply Chain will radically change the transformational RFID technology. It brings transparency in supply chain by cut out-of-stocks, counterfeit and shrinkage. Manpower savings is one of the most important features of the RFID supply chain management system. It is flexible for all kind of applications; range will grow when RFID combined with other sensors.
    Initially RFID is used to manage the large amount of goods like pallet and cartoon labels, identification. So RFID tags must have unique serial identifier for each batch of the product at the lading time, on the bill. It makes the less possibility of redundant data entry by scanning the RFID tag. The reason is RFID tag reader can scan many tags during a 1-second period.
    There are 2 types of RFID tags: passive and active. When reader reads the passive tag, Reader received the energy through tag’s antenna and transmits the data in the form of energy back. The main reason of widely used passive tags is its low cost.
    Active tag uses own power supplies mostly battery and transmit data to the reader. Battery is also used with other devices. For e.g. Active tags may be used with some kind of unpreserved goods that have thermometers to ensure the goods are kept at an acceptable temperature.
    It is very difficult to standardize the encoding information on RFID intelligent tags for supply chain management for bar codes.
    The standards for basic product information are encoded in RFID chips and standard to manage UPC information in bar codes are presented by EPCglobal Inc.
    The entire standard for information passing from RFID readers to other applications and from application to application, in supply chain are established by EPCglobal.
    These standards become useful when goods are ship from one company to company in terms of electronic transaction that will occur in between organization’s enterprise resource planning systems. These standards maintain every time when middleware handles data scanned by an RFID reader as goods enter a warehouse and will pass the data to an enterprise application.
    On the other hand it includes costs to the supply chain. But the investment in front of good ROI is not matter in case of RFID solutions.

    Scalability testing and 7 ways to improve performance

    Scalability testing and 7 ways to improve performance

    Systems that work well during development, deployed on a small scale, can fail to meet performance goals when the deployment is scaled up to support real levels of use.

    An apposite example of this comes from a major blue chip company that recently outsourced the development of an innovative high technology platform.  Though development was behind schedule this was deemed acceptable.  The system gradually passed through functional elements of the user acceptance testing and eventually it looked like a deployment date could be set. But then the supplier started load testing and scalability testing.  There followed a prolonged and costly period of architectural changes and changes to the system requirements. The supplier battled heroically to provide an acceptable system, until finally the project was mothballed.

    This is not an isolated case.  IT folklore abounds with similar tales.  From ambulance dispatch systems to web-sites for the electronic submission of tax returns, systems fail as they scale and experience peak demands.  All of these projects appear not to have identified and ordered the major risks they faced.  This is a fundamental stage of risk based testing, and applies equally to scalability testing or load testing as it does to functionality testing or business continuity testing. With no risk assessment they did not recognise that scaling was amongst the biggest risks, far more so that delivering all the functionality.

    Recent trends towards Service Oriented Architecture (SOA) attempt to address the issue of scalability but also introduce new issues.  Incorporating externally provided services into your overall solution means that your ability to scale now depends upon these external system operate under load. Assuring this is a demanding task and sadly the load testing and stress testing here is often overlooked.

    Better practice is to start the development of a large scale software system with its performance clearly in mind, particularly scalability testing, volume testing and load testing.  To create this performance testing focus:

    1. Research and quantify the data volumes and transaction volumes the target market implies.  Some of these figures can be eye openers and help the business users realise the full scale of the system. This alone can lead to reassessment of the priority of many features.   

    2, Determine the way features could be presented to users and the system structured in order to make scaling of the system easier.  Do not try and have the same functionality you would have for a single user desktop solution provide an appropriate scalable alternative.

    3. Recognise that an intrinsic part of the development process is load testing at representative scale on each incremental software release.  This is continual testing, focusing on the biggest risk to the project: the ability to operate at full scale. 

    4. Ensure load testing is adequate both in scope and rigour.  Load testing is not just about measuring response times with a performance test.  The load testing programme needs to include other types of load testing including stress testing, reliability testing, and endurance testing.

    5. Don’t forget that failures will occur. Large scale systems generally include server clusters with fail-over behaviour.  Failure testing, fail-over testing and recovery testing carried out on representative scale systems operating under load should be included.

    6. Don’t forget catastrophic failure could occur. For large scale problems, disaster testing and disaster recovery testing should be carried out at representative scale and loads.  These activities can be considered the technical layers of business continuity testing. 

    7. Recognise external services if you use them. Where you are adopting an SOA approach and are dependent on external services you need to be certain that the throughput and turnaround time on these services will remain acceptable as your system scales and its demands increase.  A smart system architecture will include a graceful response and fall-back operation should the external service behaviour deteriorate or fail.

    © Acutest 2005 – http://www.acutest.co.uk/