Typicallife is about 10 million cycles. Pneumatic actuators on their own are inexpensive. However, they do require an air compressor system installation which can be ordered from Air compressor dealers.
High speed is possible with wide screw pitch, though such geometry compromises speed and positioning precision. Cycle life is comparable to that of pneumatic cylinders. Electric actuators first replaced hydraulic actuators as mentioned above but are now facing direct competition from linear motors due to the speed- precision tradeoff and cycle life. These devices cost about three times what pneumatic cylinders cost.
Linear-motor actuators are servo devices with programmable position and speed capabilities. They can have a much longer life (to 100 million cycles) than air cylinders or ball screw actuators. To get relatively high speeds, the actuators need current to 5-A+ range, this being needed due to mass of the moving magnet. Force level is comparable to pneumatic devices. The price is about eight times that of pneumatic devices.
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The New Sebatron THORAX is an evolution from previous models most notablely in Frequency Response , Dynamic Range , improvements over noise floor and compression characteristics. Quality components and build make this Valve Microphone preamp and Compressor a must for any Professional recording setup.
There are numerous advantages to housing preamp/EQ and compressor under the same lid. Most notably is the fact that buffer circuitry (which is used to enable core circuits to drive long cables) can be minmized or eliminated. This contributes to a streamlined audio path. Additionally, processing sections can be incorporated into the gain stages themselves further streamlining the audio path.
The new Thorax has both these benefits which contribute to a low noise floor and wide bandwidth. The added advantage of High Voltage rails and discrete Class A circuitry make the Thorax deal with audio signals with a huge amount of headroom and minimal sound degredation.
Thorax preamp:
The Thorax preamp features six way selectors for pad/gain and shelf EQ. This allows for quick recallable settings and improved performance. Both High and Low shelf EQ have been intergrated into the preamp circuit to preserve signal purity. The frequency bands chosen are the ones which resonate best with this configuration. The High shelf EQ is smooth and never brittle and can be used to open up signals for increased clarity and definition. The Low shelf EQ adds or subtracts low frequency response to the signal and can be subtle or obese depending on the setting. The Equalizer sounds natural and classic leaving surgical manipulations to be done in the box. Adjusting the pad/gain selector not only changes the amount of amplification of the preamp but changes response and colour. The ranges overlap so there is more than one way to get to the gain required with a different response.
Thorax compressor:
Loosely based on our SMAC optical compressor, the Thorax compressor section has been designed for vesatility and ease of use. Sounds can be compressed from different angles to achieve the required result. To squash sounds even further the Thorax is equipt with a pump setting that extends ratio control and in feedforward mode creates a slight duck. The two compression curves, feedforward and feedback, have different processing charactersitics most obvious at higher ratios. Each one applicable to a certain situation and easy to set up. Another valuable feature is the comp mix control which can allow one to retain some of the dynamics of the original signal.
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