|
In cricket a bowling machine is a device which enables a batsman to practice (usually in the nets) when there is no-one available to bowl to him, or no one of the desired style or standard. For the insect, see Cricket (insect). ...
Cricket batsman A batsman in the sport of cricket is, depending on context: Any player in the act of batting. ...
Cricket nets are practice nets used by batsmen and bowlers to warm up and/or improve their techniques. ...
Darren Gough bowling In the sport of cricket, bowling is the action of propelling the ball towards the batsman. ...
There are a number of different types of bowling machine available to cricket coaches, each quite different in the ways they achieve the required delivery, though most allow you to use a remote control, so that a coach can be closer to a batsman when he plays a stroke. Darren Gough bowling In the sport of cricket, bowling is the action of propelling the ball towards the batsman. ...
“Bola” Type Bowling machines
This type of machine is by far the most common, and that’s probably because it’s simple, strong and hence reliable, as well as being able to bowl a useful range of deliveries.
How it works The main mechanism of the machine consists of two heavy wheels, between 30 and 50 cm in diameter, shod with solid or pneumatic rubber tyres, each driven by it’s own electric motor. These are mounted in a frame such that the wheels are in the same plane, about 7 cm apart (slightly less that the diameter of a cricket ball). A ball joint allows the machine a wide range of movement. The whole assembly is mounted on a sturdy tripod or other frame so that the plane of the wheels is roughly at the same height that a typical bowler would release the ball from. A chute delivers the ball between the wheels, protecting the coach’s hands. Pneumatics, from the Greek πνευματικός (pneumatikos, coming from the wind) is the use of pressurized air in science and technology. ...
Rotating magnetic field as a sum of magnetic vectors from 3 phase coils An electric motor converts electrical energy into kinetic energy. ...
Cricket ball A cricket ball is a hard, solid ball used to play cricket. ...
Look up tripod in Wiktionary, the free dictionary. ...
Two intersecting planes in three-dimensional space In mathematics, a plane is a fundamental two-dimensional object. ...
The motors are typically powered by a deep cycle battery, and turn in opposite directions. An controller allows variation of the speed of each wheel, allowing the machine to be slowed down for less experienced batsmen, or when the motors are not running at the same speed, swing or spin bowling can be simulated. Lead-acid car battery A car battery is a type of electric battery that supplies electric energy to the starter motor and the ignition system of a vehicle’s engine. ...
These machines will work with any ball of roughly the right size and weight, such as normal cricket balls or tennis balls. However, they usually work best with their own balls, which are made of hard plastic, and are covered in dimples. These dimples are to help with the swinging characteristics when this type of delivery is desired.
Simulating different deliveries
This is fairly obvious. Simply set both wheels to the same speed, as fast as the batsman is able to deal with, and the coach can move the machine around slightly to vary the line and length of each ball. Fast bowling, sometimes known as pace bowling, is one of the two approaches to bowling in the sport of cricket. ...
The plane of the wheels is flat, and the motors are set to run at slightly different speeds. This means the ball will be spinning about an axis perpendicular to the ground. The will cause the ball to swing due to the Magnus Effect. If the ball is spinning anticlockwise (looking from above) the ball will swing from right to left; clockwise spin results in a swing from left to right. This mean that the coach should slow down the wheel on the side he wants the ball to swing to. Note that this sort of swing is different to normal swing bowling, it’s much more like a curling football. Swing bowling is a technique used for bowling in the sport of cricket. ...
To achieve spin, the machine should be tilted to one side, and the wheels set to different speeds as per spin bowling. It will also probably be necessary to make the machine bowl significantly more slowly. The combined action of the spin imparted by the wheels, and the non-perpendicular axis of that spin will cause the ball to bounce up at an angle. Spin bowling, sometimes known as slow bowling, is a technique used for bowling in the sport of cricket. ...
Is possible, but difficult due to the unpredictable way the ball will roll into the machine and between the wheels. However, it’s possible that the ball will eventually come out at the right angle and bounce unpredictably. Seam bowling is a technique used for bowling in the sport of cricket. ...
To get balls that bounce unnaturally high or low, the plane of the machine must be set so that it is vertical. Not all machines can do this, simply because their ball joint doesn’t give the required range of movement. To get balls that that bounces higher than normal, the lower wheel should spin slightly faster than the upper. Deliveries that boucle much lower than normal are less common and usually the result of the ball striking a broken-up patch of ground. These balls can still be simulated though, by increasing the speed of the upper wheel. In the sport of cricket, a bouncer (or bumper) is a type of delivery, usually bowled by a fast bowler. ...
“Kanon” Type bowling machines This design is significantly less common.
How it works The mechanism for delivering the ball is very different to the machines described above.
Most of the space in the machine is a hopper that contains the balls. At the bottom of the hopper, near the front, is a rotor with space for 6 balls. The balls slot into the spaces on rotor by gravity, which then takes them into the innards of the mechanism. The rotor passes over a trapdoor, which the ball opens due to its weight, and falls into a small chamber.
An air pump is used to provide a flow of air into the chamber that the ball drops into. The airflow pushes the ball along the chamber to a ring of rubber, where the hole in the centre of the ring is slightly smaller than the ball. The ball presses up against this ring, and the pressure builds up, until the pressure becomes too great and the ring releases the ball. The ball flies along a tube, which carries the ball up to the normal height a bowler releases from.
Simulating different deliveries
Fast bowling A system exists that allows air to escape from the barrel shortly after it’s passed the ring of rubber. This reduces the pressure on the ball, reducing it’s muzzle velocity. Closing this increases the speed to it’s maximum.
Swing Bowling To do this a curved piece of tubing is attached to the end of the barrel. The ball rolls around this causing is to spin, and swing as described above.
Spin Bowling The tubing used for swing bowling can also be used for spin bowling, by pointing the curve somewhere between vertical and horizontal.
Seam Bowling Seam bowling is impossible on this machine as it only accepts tennis balls and slazballs (a hard, small, heavy ball, tennis ball, usually red, used for cricket training). Neither of these types of ball have a seam.
Bouncers The tubing can again be used, this time to simulate high and low bounce by mounting the tube vertically.
Merlyn Merlyn is the creation of a man called Henry Pryor, a dedicated Cricket coach in [[Hertfordshire[[, England. It has only recently come to public attention, as it was used by the English cricket team in the run-up to and during the 2005 Ashes Series. The logo of the England Cricket Team which shows the three Lions of England below a five-pointed crown The England cricket team is a cricket team which represents England and Wales, operating under the auspices of the England and Wales Cricket Board (ECB). ...
...
The machine is utterly different to anything that has come before it. Both of the types of machines described above are fairly simple designs, intended for regular, hard use by clubs, are hence simple to operate and reliable. They can also only simulate one type of delivery with the machine in a given configuration. The also have their limitations, particularly with spin bowling, that limit their usefulness to players at the highest levels of the game.
Merlyn by contrast was designed with the intention of creating a machine that “could bowl any ball known to man.”[1] The mechanism used to do this has not been publicly revealed, though it is safe to assume it is much more complex than the other machines.
Crucially, the machine is claimed to be able to emulate Shane Warne's leg breaks, and although he is dismissive of its usefulness[2], the England batsmen disagree, and consider their ability to play spin bowling significantly improved. Shane Keith Warne (born September 13, 1969 in Ferntree Gully, Victoria, Australia), is an Australian cricketer, and captain of Hampshire. ...
A leg break is a type of delivery in the sport of cricket. ...
The machine, as well as its mechanical abilities, also has significant elements of computer control built in. It is claimed that it can reproduce an over from a bowler if fed the correct data.
One of the more unnerving aspects of the machine is that it provides no indication of the type of ball it’s about to bowl until the ball has left the machine. This forces batsmen to work on their instinctive batting, rather than trying to second guess the bowler.
An improved version is currently in development at Loughborough University, which will add visual feedback by showing a representation of the bowler projected onto a screen. The ball will be released as the virtual bowler’s hand reaches the hole from which the ball is released. The version of the machine will be designed for mass production, so it can be sold to cricket clubs around the world.[3] Loughborough University is a University located in the market town of Loughborough, Leicestershire in the East Midlands region of the United Kingdom. ...
Makers of Bowling machines
BOLA type
Kanon Type
Merlyn - The Merlyn Bowling Company - http://www.merlynbowling.com/
See also A pitching machine is a machine that automatically pitches a baseball to a batter at different speeds and styles. ...
References - The history page at Merlyn’s Official Website.
- "Defeat will make England hungry – Warne" by Jenny Thompson Cricinfo, June 7, 2006 retrieved July 21, 2006
- "England await Merlyn's heir" by Pranav Soneji, BBC, June 5, 2006, retrieved July 21, 2006
- "Merlyn proves a triumph for man and machine" by Matthew Pryor, "The Times" July 23, 2005
| 
Feeds |
Contact