Tag Archive | CNC machine

Anger at wind turbine plan on land that inspired David Hockney

PLANS for a 45m wind turbine in the heart of Wolds – which has inspired artist David Hockney – are being opposed by the Ministry of Defence (MoD).

The owner of Tuft Hill Farm in Woldgate, near Bridlington, has already installed a 34m turbine in the same area after it was granted on appeal.

East Riding Council had rejected the original turbine due to the impact it would have on the Wolds countryside.

Now, there is further opposition and concern raised by the MoD, English Heritage and the Humber Archeology Partnership.

An MoD spokesman said: “The turbine will cause unacceptable interference to the radar at Staxton Wolds.

“The probability of the radar detecting aircraft flying over or in the vicinity of the turbines would be reduced and the RAF would be unable to provide a full air surveillance service in the area of the proposed wind turbine.”

English Heritage is concerned the turbine is close to a number of important sites and could have a detrimental visual impact.

In submitting comments, the organisation said: “The application site is adjacent to a number of scheduled monuments and listed buildings and the Kilham Village Conservation Area.”

English Heritage is calling for the application to be deferred as it does not feel there is enough information.

Humber Archeology Partnership has echoed English Heritage’s concerns and is asking for a geological survey to be carried out to provide more information about the impact of the proposed turbine.

Rudstone and Burton Agnes parish councils have also opposed the application, believing the turbine would spoil the view along the ridge of the Wolds and are concerned because there is already a turbine on site.

But there has been support for the application with more than 20 neighbours backing the plans, claiming that there is an vital need for renewable energy.

In the design statement, landowner Harrison Farms said: “The second turbine would ensure that the energy needs of the farm are met in the long-term, as well as the aspirations of the Harrison Farm business be carbon neutral overall.

“The turbine would provide a number of economic and environmental benefits, enabling the business to absorb the energy demands resulting from its recent expansion.

“The business is also under pressure to introduce sustainable sources of energy linked to an agreement it has with a local growers’ co-operative.”

The first turbine was rejected by East Riding Council planners, who feared it would intrude on views across the countryside.

But, following a public inquiry, planning inspector David Pinner said the turbine’s impact on the area would be “slight”. Read the full story at scfwindturbine web.

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The benefits of being Christian

It is not unusual for large companies to offer great perks. Among the common is a great insurance benefit package with little or no cost to the employee.

Then there are the typical perks of employee discounts on phones, rental cars, dry cleaners, hotel lodging, apartment rentals, computer purchases, auto repair and discounts on tax preparation.

If you are one of the lucky people to have landed a position in the Silicon Valley in California, the perks are out of this world.

A company with 250 employees provides every full-time worker the option to have their homes cleaned twice a month — for free.

Another business in the Silicon Valley offers free take-home dinners and helps find last minute babysitters when your child is too sick to attend school.

A consulting firm offers back-up assistance for the care of an elderly parent or grandparent. They also offer personal trainers, nutritionists and counseling services free to their employees.

One high-tech company offers free food in their impressive food court, dry cleaning services and an added bonus of $500 for new parents and fresh fish delivered to the office every day for the employees to take home.

Some of these companies allow families to come during the evening hours and eat free in their food court when employees work late. They also provide a $3,000-per-year child care benefit.

Other major companies offer free health club memberships for employees and their families. Their outlook is the healthier the employee, the less they will use their medical benefits.

Being a Christian has marvelous benefits. The first is eternal life. Then there’s the added benefit of spending eternity in a mansion prepared just for you and streets paved with gold. Awesome.

While here on earth, you have the benefit of going to Our Heavenly Father in prayer any time of the day or night, knowing He hears and will answer your prayer.

You have the confidence that you are never alone; that He is always with you. No one else can offer that promise.

Then there’s the promise of peace, joy and happiness, no matter what situation you face.

The Great Physician is standing ready to provide healing whenever you need it, at no extra charge.

Unconditional love, even when you don’t deserve it, and a friend who will stick by you to the end.Of all the perks big companies have to offer, they can’t begin to compare.

Illegal use of B&Bs to house homeless soars by 800%

Charities and councils say a combination of welfare cuts and lack of affordable housing has led to the almost ninefold increase. The latest figures show 900 adults and children had been housed in B&Bs for a month and a half at a time, often sharing a single room without a kitchen or any meaningful storage space.

Guest houses and hotels are meant to be a short-term solution while families wait for council accommodation, and local authorities are flouting the law when they families stay for more than six weeks. Such decisions are subject to judicial review.

These emergency measures are expensive for the taxpayer. Councils are spending in some cases more than a thousand pounds a week to house people in hotels.

Tory-run Wellingborough spent 1,961 in one week for a family. Lib Dem-controlled Eastleigh spent 1,932 for a family with seven children for a seven-day stay. Labour’s North East Derbyshire district council shelled out almost 700 for a week. Tory-run Dartford said it spent 616 for one week for a family of five. However, the family stayed there for almost eight months, an apparent cost of 21,355 to taxpayers.

Of the 125 local authorities that placed homeless families in hotels for more than six weeks, more than half (54%) were Tory-run. About a third (35) were Labour. The problem is most acute in London, where there is no spare council housing and private rents are soaring. The result is that many local authorities are subsidising private hotels.

Last week it emerged that the Tory flagship borough of Westminster is spending almost 85,000 a week housing families in 10 West End hotels, with more than 22,500 a week paid to the Central Park Hotel, two minutes’ walk from Hyde Park, and more than 17,000 a week to the Copthorne Tara Hotel in Kensington. Labour pointed out that this would work out at almost 4.5m a year. The Guardian spoke to one mother of three who was placed for nine weeks in four different hotels and bed and breakfasts last year after her husband’s building business collapsed. Westminster council was paying almost 1,000 a week to house her family inside the borough and in Lambeth, south London.

“We had a big five-bedroom house in Maida Vale. I have three children and we were put up in one room. My kids were going to school north of the river and we were put south of it. My eldest had exams so we had to send him to my mother’s.

“There’s no place to cook, no fridge, no Wi-Fi, no washing machine, no place to put our things. The whole place ends up smelling.”

She said she blamed both the local authority for not having enough council housing and “greedy landlords who think nothing of asking for 1,500 a week in rent”. Her family ended up on a council estate after three months of being moved around. “We are grateful, obviously, for the support but the conditions here are awful. Damp and cramped. They obviously don’t want to help.”

Jack Dromey, Labour’s shadow housing minister, whose staff collated the survey, said it was “an absolute disgrace that on this government’s watch there has been an 800% increase in families with children and pregnant women living in bed and breakfasts for months on end.

Complete CNC Board Implementation

Computer numeric control (CNC) is a computer-based system used to control tools such as milling machines, lathes, routers, lasers, punches, water jets, and 3D printers. For a long time, CNC equipment remained constrained to the industrial shop. With the recent proliferation of personal computers, however, CNC has managed to move into the home environment with an ever-increasing number of do-it-yourself (DIY) enthusiasts and hobbyists building their own CNC equipment. The reason this technology enjoys such a large acceptance is because it has the accuracy and repeatability that only a computer-controlled system can offer. In this article, I detail an implementation for a set of electronics that can be used to control pretty much any small or midsized CNC machine.

I call this implementation the CNC motherboard, as it revolves around a backplane that accepts motor driver modules to drive the CNC machine axes. In this incarnation, the CNC motherboard can support up to four axes, which is more than enough for the great majority of CNC equipment topologies being built today. The motor driver modules typically are based on bipolar stepper motor drivers with a step/direction interface. In essence, any motor topology can be used, as long as it works by moving according to STEP commands. Since the number of stepper motor power stages with an inherent step/direction interface is always growing, we see the stepper motor ruling the great majority of DIY CNC equipment implementations.

The control of these four axes is supported by a series of blocks. The brain of a CNC machine is a computer called the CNC controller. It is in charge of sending a series of STEP pulses and setting the ENABLE and DIR control lines to the motor driver modules according to a command better known as G code. A G code command can be anything like “move in a line to coordinates X,Y,Z at speed F,” “move in a curve,” “drill a hole,” and so forth. The CNC controller interprets this command and generates the respective combination of STEP/DIR pulses, and at the right frequency, to achieve the required motion.

The CNC controller for our DIY CNC machine can be any personal computer (PC) with a parallel port. Although PCs are no longer being fabricated with parallel ports, adding this resource in the form of an expansion card is very simple. The PC connects to the CNC motherboard through this parallel port, granting us a total of 12 output functions and five inputs.

Before we start distributing the control signals in and out of the different control functions, we add an isolation block for two main reasons. First, this isolation stage protects the computer in case something goes very wrong. Since the motor drivers can be employing high voltages that can hurt the computer, it is best to make sure the computer side cannot come in contact with this higher form of energy. Second, the isolation helps to decrease the control line’s noise caused by ground bouncing.

The control of four motor modules claims nine control signals: one ENABLE, which will be shared among the four modules; one STEP; and one DIR per module. The remaining outputs are distributed as follows. Two are used to control two 250V AC/30A relays. The other output runs a watchdog protection block, often referred to as the charge pump.