Pilot Crushtec International’s crushers have throughput capacities of between 10 and 700 tons per hour, with feed sizes of up to 1000mm. With the large demand for processed materials locally and internationally, and to meet the requirements of contractors, miners and quarries, we offer fully mobile tracked and semi-mobile skid-mounted crushers.

Pilot Crushtec International (Pty) Ltd supplies a full range of cost-effective, heavy-duty, fit-for-purpose, crushing equipment.

Effects always run at least once. When an effect runs, it tracks any signal value reads. Whenever any of these signal values change, the effect runs again. Similar to computed signals, effects keep track of their dependencies dynamically, and only track signals which were read in the most recent execution.

When you create an effect, it is automatically destroyed when its enclosing context is destroyed. This means that effects created within components are destroyed when the component is destroyed. The same goes for effects within directives, services, etc.

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When creating a signal, you can optionally provide an equality function, which will be used to check whether the new value is actually different than the previous one.

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Effects return an EffectRef that you can use to destroy them manually, by calling the .destroy() method. You can combine this with the manualCleanup option to create an effect that lasts until it is manually destroyed. Be careful to actually clean up such effects when they're no longer required.

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Effects are rarely needed in most application code, but may be useful in specific circumstances. Here are some examples of situations where an effect might be a good solution:

Products Jaw Crushers Cone Crushers Screens VSI Crushers HSI Crushers Double Roll Crushers Conveyors Feeders & Hoppers Recycling Tower Lights Washing Plants

The semi-mobile / modular solutions are comprised of standard, heavy-duty crushers supplied complete and ready to run. Crushers, mounted on skid-frames, do not require concrete foundations and are designed for rapid installation and easy integration with the rest of our product range. Pilot Crushtec International supplies standard modules which are reconfigurable and scalable and therefore allow customers to start small and change or grow their processing plant as demand increases. These tried and tested crushers are designed to handle the harshest conditions and toughest rock in all types of applications.

This example will log a message when either currentUser or counter changes. However, if the effect should only run when currentUser changes, then the read of counter is only incidental and changes to counter shouldn't log a new message.

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When you read conditionalCount, if showCount is false the "Nothing to see here!" message is returned without reading the count signal. This means that if you later update count it will not result in a recomputation of conditionalCount.

As a result, you can safely perform computationally expensive derivations in computed signals, such as filtering arrays.

Signals are useful because they notify interested consumers when they change. An effect is an operation that runs whenever one or more signal values change. You can create an effect with the effect function:

Only the signals actually read during the derivation are tracked. For example, in this computed the count signal is only read if the showCount signal is true:

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By default, you can only create an effect() within an injection context (where you have access to the inject function). The easiest way to satisfy this requirement is to call effect within a component, directive, or service constructor:

Rarely, you may want to execute code which may read signals within a reactive function such as computed or effect without creating a dependency.

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Note that dependencies can be removed during a derivation as well as added. If you later set showCount back to false, then count will no longer be considered a dependency of conditionalCount.

Angular Signals is a system that granularly tracks how and where your state is used throughout an application, allowing the framework to optimize rendering updates.

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Effects might start long-running operations, which you should cancel if the effect is destroyed or runs again before the first operation finished. When you create an effect, your function can optionally accept an onCleanup function as its first parameter. This onCleanup function lets you register a callback that is invoked before the next run of the effect begins, or when the effect is destroyed.

doubleCount's derivation function does not run to calculate its value until the first time you read doubleCount. The calculated value is then cached, and if you read doubleCount again, it will return the cached value without recalculating.

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Writable signals provide an API for updating their values directly. You create writable signals by calling the signal function with the signal's initial value:

If you set showCount to true and then read conditionalCount again, the derivation will re-execute and take the branch where showCount is true, returning the message which shows the value of count. Changing count will then invalidate conditionalCount's cached value.

Pilot Crushtec International (Pty) Ltd is South Africas leading supplier of mobile and semi-mobile crushing, screening, recycling, sand washing, stockpiling, compacting and material handling solutions. Our product range includes jaw crushers, cone crushers, vertical shaft impact (VSI) crushers, impact crushers, screens and conveyors.

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For example, suppose that when currentUser changes, the value of a counter should be logged. you could create an effect which reads both signals:

The Metso mobile solutions we offer are ready-to-run, versatile crushers with instant set-up time, ensuring that customers can generate income immediately. These solutions are diesel-driven and therefore work independently of the electricity grid and require no external power supply. They are cost-effective, as they save installation costs and time, and offer quick and easy reconfiguration of the plant for changing production demands.

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The doubleCount signal depends on the count signal. Whenever count updates, Angular knows that doubleCount needs to update as well.

Our crushing solutions are ideal for primary, secondary and tertiary applications in quarrying, mining, recycling, infrastructure and construction. Pilot Crushtec International’s machines crush millions of tonnes of :

Avoid using effects for propagation of state changes. This can result in ExpressionChangedAfterItHasBeenChecked errors, infinite circular updates, or unnecessary change detection cycles.

A signal is a wrapper around a value that notifies interested consumers when that value changes. Signals can contain any value, from primitives to complex data structures.

When you read a signal within an OnPush component's template, Angular tracks the signal as a dependency of that component. When the value of that signal changes, Angular automatically marks the component to ensure it gets updated the next time change detection runs. Refer to the Skipping component subtrees guide for more information about OnPush components.

Computed signal are read-only signals that derive their value from other signals. You define computed signals using the computed function and specifying a derivation:

To get up and running and to start generating revenue quickly, add Pilot Crushtec International’s crushers to your processing plant.

If you then change count, Angular knows that doubleCount's cached value is no longer valid, and the next time you read doubleCount its new value will be calculated.