P35 Piezo Tip/Tilt Platform User Manual

Declaration

This user manual is applicable to the P35 Piezo Tip/Tilt Platform. For smooth and correct use of this product, please read this manual carefully before using it. Please follow the instructions during installation and use. Improper operation may cause injury to the operator and/or damage to the product. It is required that the entire installation and operation process should be completed by professionals with a certain foundation and understanding of product principles, or under professional guidance. CoreMorrow will not be responsible for any consequences arising from unauthorized disassembly or transformation of the product. False sales of CoreMorrow products or changes to product models are illegal. Users should be vigilant and report or contact CoreMorrow to jointly crack down on illegal acts and prevent fraud and economic losses. CoreMorrow will investigate the legal responsibility of the illegal subject and related parties. With continuous technological development and innovation, CoreMorrow will timely add the latest information to the manual as required. If needed, please contact CoreMorrow or visit the website www.coremorrow.com for download. We apologize for any inconvenience caused.

1. Introduction

1.1 Purpose and content

This manual is primarily for your smooth and correct use of the P35 Piezo Tip/Tilt Platform. It contains all necessary information for the P35 Piezo Tip/Tilt Platform, including precautions during installation and use.

1.2 Symbol and meaning

⚠️ DANGER: Improper handling may cause injury to the operator.

? Attention: Improper handling can cause damage to the equipment.

[No specific order]

[Operate in sequence]

1.3 Users of This Manual

The intended user of this manual has knowledge of piezoelectric products and controllers, and possesses a certain foundation for their installation and use.

1.4 Manual Lost and Reissued

If this manual is lost, please contact CoreMorrow. We will send you the latest version of the user manual.

2. Safety Guide

The P35 Piezo Tip/Tilt Platform is designed with advanced technology and safety standards. For your safety and correct product use, please observe the following points:

• A change in temperature and pressure can charge the piezoelectric actuator. The actuator will remain charged for a period after disconnection from the controller. Operators should be aware of this during use.
• Do not disassemble the P35 Piezo Tip/Tilt Platform.
• Discharge the P35 before mounting by connecting it to the controller.
• Do not unplug the wire connecting to the controller during operation.
• Before use, check if the product's connection wire is in good condition and if the product and controller are effectively grounded.
• During operation, strictly standardize procedures. Do not touch the product (up to 150V voltage) when powered on to avoid electric shock.
• To prevent damage from improper operation:
  • The P35 Piezo Tip/Tilt Platform should be used in a dust-free, oil-free, and lubricant-free environment.
  • As the product has a flexible structure, it is recommended that the load does not exceed its capacity.
  • When loading, DO NOT apply torque force, and DO NOT pry or twist the load surface to avoid damaging the structure.
  • The recommended voltage range for long-term use and lifetime is 0~120V.
  • Do not disassemble the product to avoid damage.
  • Avoid stretching and bending the cable interface to prevent cable damage.
  • Use the dedicated cable provided by CoreMorrow to connect the P35 Piezo Tip/Tilt Platform to the controller. Do not connect via an extension cable casually; if a longer cable is needed, please contact CoreMorrow.

3. Product Overview

3.1 Product Introduction

The P35 Piezo Tip/Tilt Platform offers several advantages:

High performance piezo stack:

The P35 piezo tip/tilt platform is driven by a highly reliable ceramic actuator with a fully insulated structure, providing superior performance and service life compared to traditional actuators. The insulating layer effectively prevents piezoelectric ceramic damage from moisture, ensuring stability even in extreme circumstances. Unlike traditional driving mechanisms, it has no transmission parts or friction, offering characteristics like no rebound, maintenance-free operation, and wear-free performance.

Flexible hinge structure:

Adopting a flexible hinge mechanism, the P35 Piezo Tip/Tilt Platform provides no friction and high positioning accuracy. A flexible hinge is unaffected by static and dynamic friction, relying on the elastic deformation of metal materials (e.g., steel) without rolling or sliding parts. This flexible unit has very high load capacity and stiffness, requires no maintenance, and is suitable for a wide range of temperatures without needing lubricating oil.

Strain sensor:

Strain sensors detect position information through their own expansion. Fixed in proper positions within the transmission part, they measure the displacement of the moving part. This indirect measurement method uses a measuring lever, guide hinge, or piezoelectric ceramic stack to determine the moving platform's displacement. The P35 Piezo Tip/Tilt Platform features a travel range of up to 43mrad in X/Y, fast response speed, high repeatable positioning accuracy, and high flexibility, making it easy to operate and suitable for various applications. The product can also be customized to specific needs.

3.2 Principle

The piezo control principle is illustrated in Figure 1. The P35 Tip/Tilt Platform (two-axis motion) is based on a parallel kinematic design with coplanar axes and a moving platform. Four piezo actuators are positioned at 90° intervals, utilizing paired differential control distribution. Two pairs of differentially driven actuators provide the highest achievable angular stability over a wide temperature range. Its tilt motion is achieved by two pairs of piezo actuators operating in a push-pull manner, controlled by a bridge connection circuit. The deflection angle of the P35 Tip/Tilt Platform can be calculated as follows:

Figure 1: P35 control principle diagram showing two channels (Channel 1, Channel 2) connected to piezo actuators, with a constant voltage source.

Figure 2: Schematic of a Tip/Tilt Platform showing two piezo actuators (PZT1, PZT2) and their positions relative to a pivot point 'a'.

The deflection angle in X is calculated as: θx = ΔX (LPZT1 - LPZT2) / a

Wherein:

• LPZT1 - PZT1 Displacement
• LPZT2 - PZT2 Displacement
• a - The distance between the two piezo actuators.

Similarly, the deflection angle in Y is calculated as: θy = ΔY (LPZT3 - LPZT4) / b

Dynamic characteristics of P35 Tip/Tilt Platform:

The operating frequency of the P35 depends on its resonant frequency. To estimate the resonant frequency after loading a mirror (moving surface and mirror), the moment of inertia of the mirror must be considered. The moment of inertia of a cylindrical mirror is calculated as: Im = m/12 * (3R² + 3H² + 4T²). The moment of inertia of a rectangular mirror is calculated as: Im = m/12 * (L² + H² + 12T²).

Wherein:

• m - Quality of mirror
• Im - The moment of inertia of mirror
• L - Length of the mirror perpendicular to the rotation axis
• H - Thickness of mirror
• T - Distance between the axis of rotation and the surface of the platform
• R - Radius of mirror

The resonant frequency after loading a mirror can be calculated using the unloaded resonant frequency and the moment of inertia of the mirror. The calculation formula is as follows:

f' = f0 / sqrt(1 + Im / I0)

Wherein:

• f' - Resonant frequency after loading mirror
• I0 - The moment of inertia of the unloaded moving surface
• f0 - Unloaded operating Frequency
• Im - The moment of inertia of the mirror

3.3 Product Features

Deflection Angle up to 43mrad, High precision sensor, High positioning accuracy, Sub-mrad resolution, Fast response.

3.4 Motion Direction

Figure 3: Diagram illustrating the motion directions (AXIS1, AXIS2) of the P35 Piezo Tip/Tilt Platform.

4. Operating environment

Operating temperature: -20~80°C. Environment should be free of dust, clean, and non-corrosive substances. Relative humidity: <60%. Recommended voltage between 0 and 120V for long-term and high-reliability operation.

5. Installation and operation

Safety checks should be carried out before installation, such as verifying that the connection wire is not damaged or broken, and that the drive power supply is properly grounded.

5.1 Installation and Precautions

Figure 4: P35 Installation diagram showing mounting holes (M2.5) and lead wire exit.

1. Before attaching the mirror, please clean both the mirror and the motion surface. After the mirror is glued, allow sufficient time for the adhesive to solidify. A mirror adapter can also be used, as shown in Figure 5.
2. You need to use M2.5 screws for mounting the P35, or you can use an adapter. CoreMorrow offers various adapters. Before mounting, clean the mounting surface and the adapter.
3. Mount the P35 directly onto the mounting surface or via an adapter. Please contact CoreMorrow if you intend to mount it without a stand (e.g., lean or lateral mounting).

Figure 5: Illustration of mirror adhesive application and a mirror adapter.

Figure 6: Illustration of a transfer adapter for mounting.

4. Connect the P35 connector to the controller. The wiring mode for the LEMO connector is shown in Figure 7.

Figure 7: Connector diagram showing LEMO connector for sensor output and PZT drive output, with labels.

Mounting notes:

• Do not knock the moving part of the P35 to prevent flexure hinge deformation, which could affect movement accuracy or damage the product.
• Do not allow mirror adhesive to drop into the gap at the moving end, nor should other objects obstruct the motion, to avoid affecting accuracy or damaging the product.
• Please select appropriate screws for mounting connections to ensure firm mounting and prevent mirror detachment, which could cause permanent damage.
• Please pay attention to standard operation during the entire mounting and operation process. Users should carry out relevant operations under the guidance of professionals.

5.2 Load

When mounting the load, ensure that the load mass is less than the maximum load capacity of the P35, and try to mount the load in the center of the moving surface. Figure 8 illustrates the correct position for applying the load.

Figure 8: Illustration showing the correct way to apply load to the center of the moving surface.

For product protection, it is not recommended to use excessively high loads. If a high load must be used, please lower the position of the load's center of gravity appropriately. Figure 9 shows an incorrect mounting way where the center of gravity is too far from the active platform.

Figure 9: Illustration showing an incorrect way to mount a load with a high center of gravity.

It is forbidden to mount the load on one side of the moving platform, as this can cause serious damage to the product, as shown in Figure 10.

Figure 10: Illustration showing an incorrect way to mount a long load on one side of the platform.

Notice:

When installing the load, tighten it slowly. The torque should not be too large to prevent damage to the mechanism. Avoid stretching and bending cables; use the dedicated cable provided by CoreMorrow to connect the P35 and the controller. Do not connect via an extension cable casually; if a longer cable is needed, please contact CoreMorrow.

5.3 Operating

Before turning on the power, please reconfirm the following:

• The P35 piezo tip/tilt platform has been grounded.
• The operating environment meets the requirements for the P35.
• Fixed screws must be tightened.

After confirming the above, relevant controller operations can be performed:

1. Please read the user manual of the controller carefully before operation, and then start the controller.
2. Set the controller's output voltage to zero first.
3. Check for any abnormal phenomena, then input the voltage value (via keyboard or analog control) according to the specified input voltage range.
4. Operate normally within the rated voltage range of the piezoelectric ceramics (0~120V, maximum 150V).
5. After use, please perform a voltage reset operation.

Take light steps when the P35 is in operation; do not knock the product to avoid affecting its use or causing damage. To achieve better motion precision of the P35, it is recommended to use CoreMorrow's supporting controller. Please refer to the controller's user manual for specific operations to ensure correct usage.

Notice:

The driving voltage shall not exceed the voltage range of the P35. If any abnormal noise or oscillation occurs during use, turn off the power immediately and check the parameter settings.

6. Transportation and inspection

6.1 Transportation

This product is packed in cartons and transported under these packaging conditions. It can be transported by various means of transport under normal circumstances. During transportation, avoid direct rain and snow, corrosive substances, strong collision, extrusion, irregular placement, and other improper behaviors as much as possible.

6.2 Open-Box Inspection

Inspection content:

• Before opening the package, please check the outer packing carefully for any breakage, wetting, dampness, deformation, etc.
• Please check the completeness of package contents one by one according to the supply contract and packing list.
• Check whether the surface of the product has obvious damage.
• Check whether the product identification is clear and complete.
• Check whether the connector is loose and the connector wire is broken or damaged.

In case of any of the above, please make a detailed record, take a photo, and contact CoreMorrow for processing immediately.

Attention:

• Please handle with care when opening the package to avoid knocking against the product and causing permanent damage.
• Please do not use heavy tools or rough methods to open.
• Please do not discard all packaging materials, as they are needed for repair and return.

7. Maintenance and Treatment

7.1 Problem Handling

Common problems and their solutions are shown in the table below:

If the user cannot resolve the problem independently, please record the problem in detail and contact CoreMorrow. Professional technical personnel will assist in solving it. Problems caused by improper operation are not covered by the warranty. CoreMorrow is not responsible for any problems caused by dismantling products without permission.

7.2 Daily maintenance

If the product is not used for a long time, please store it in a dust-free, well-ventilated, clean, and non-corrosive indoor environment after packaging. During daily maintenance, do not loosen the bolts on the product structure to avoid affecting the movement accuracy. Daily cleaning: Please disconnect the product from the controller before cleaning its surface. When cleaning, gently wipe the surface with a towel dipped in a small amount of detergent, and then clean it with alcohol. Do not use an ultrasonic cleaner. When cleaning the surface, try not to pick up the product. If you must pick it up, it is best to place sponge underneath for protection. The product should not be too high from the sponge to prevent it from falling.

7.3 Disposal

Waste products should be disposed of according to national and local rules and regulations. To fulfill its responsibility as a product manufacturer, CoreMorrow disposes of all old equipment on the market in an environmentally friendly manner. If you have equipment that cannot be disposed of, you can ship it to CoreMorrow. Address: Building I2, No.191 Xuefu Road, Nangang District, Harbin, HLJ, China. Tel: +86-451-86268790.

8. Connector

8.1 Driving and Sensor Connector

There are three types of cable connectors: LEMO connector, D-SUB15 three-row pin connector, and DB13W3 connector. The driving and sensor connectors are LEMO joints. The driving connector uses a 1-contact LEMO connector, model ERA.00.250.CTL, as shown in Figure 11. The sensor connector uses a 4-contact LEMO connector, model ERA.0s.304.CLL, as shown in Figure 12.

Figure 11: Illustration of a 1-contact LEMO connector.

Figure 12: Illustration of a 4-contacts LEMO connector.

The bridge connection mode and pin definition of the strain gauge are shown in Figure 13.

Figure 13: Diagram showing the pin definition and wiring for the 4-contact LEMO connector to a strain gauge, including sensor feedback signals and ground.

9. Customer Service

If you have questions about the products you are currently using, please provide the following information:

• Product model and relevant number
• Controller model
• Software driver version
• Computer operating system where the supporting software is installed

10. Contact us

Harbin Core Tomorrow Science & Technology Co., Ltd.
Tel: +86-451-86268790
Email: info@coremorrow.com
Website: www.coremorrow.com
Address: Building I2, No.191 Xuefu Road, Nangang District, Harbin, HLJ, China
CoreMorrow Official and CTO WeChat are provided for further assistance.