PI's piezo ceramic design and manufacturing division - PI Ceramic - provides the capability and flexibility to offer highly engineered custom sub-assemblies at a very attractive price.ġ00 Billion Cycles of Life Testing, Space Qualified PI's award-winning and MARS-Rover-Proven PICMA® ceramic-encapsulated co-fired piezo stacks are polymer-free and combine superior performance with extremely long lifetime. PI's discrete actuators and the PICMA cofired stacks are available for operating temperatures up to 200 deg C. High Curie / Operating Temperatures: PI's piezo ceramic formulation boasts a high Curie temperature for a wide operating temperature range. For more information on the differences between piezo motors and actuators and their applications watch the video below, refer to the piezo motion tutorial or just contact a PI applications engineer for help. Go to the page with our amplified actuatorįor further information about any of our products, please contact us using the inquiry form on our website.It is important to understand the principles to pick the best type for an application. It is possible to increase the preload or use positive locking of the stacks for specific applications please contact us. Note that maximum recommended load is specified in “active” conditions (bias voltage applied). If the external load reaches the point where it overcomes the preload, the stacks may leave their positions, which will affect operation. Why is there a force limit on Amplified Actuators?Ī high preload on the piezoelectric stacks keeps the components in place through friction. Standard components (preload screw…) are steel but can be changed for low-magnetic applications. ![]() ![]() The piezoelectric material is NCE51F and mechanical parts are stainless steel (equivalent AISI303) and titanium alloy. about 125 N on a 5×5 mm shear plate.Īmplified Actuators What materials are used for Amplified Actuators? Typically epoxies can be used safely at 5 MPa in shear stress, i.e. If the element is bonded using epoxy, the maximum load will depend on the strength of the epoxy that is used. For example 2 MPa pressing force * 0,2 friction coefficient = 0,4 MPa, i.e. If the movement is transmitted by friction, the maximum load will depend on the pressing force and the coefficient of static friction at the interface. In practice it is the interface between the ceramic and the substrate that defines the maximum shear load. The ceramic can withstand very high loads. What is the maximum shear load that can be applied on shear elements? If high pressure is required, we recommend to use contact surfaces (both on the shear plate and on the structure) with superior flatness. This is because small defects in the contact surfaces can lead to stress concentrations and break the element. However in most cases the coating has a low stiffness compared to the piezo element so the impact will be minor (50 MPa) however in practice, we recommend not to apply more than 5 MPa axial load on shear elements. Linear Actuators I want to apply coating on my actuator is that going to reduce motion?Īny additional material in parallel with the piezo element will result in increased load on the piezo element, thereby reducing performance. ![]() The list is divided into the different product categories. On this page you can find a list of frequently asked questions about our products.
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