1. Product Overview
The SMC Type MHF2 Series Air Pneumatic Gripper Cylinder is a compact and lightweight pneumatic actuator designed for precise and strong gripping in various industrial automation applications. This series features a double-acting mechanism and is available in multiple bore sizes and stroke lengths to suit diverse operational requirements. It is engineered for reliability and efficiency in automated assembly, material handling, and other robotic tasks.
2. Specifications
2.1 General Specifications
- Motivity Type: Pneumatic
- Type: Cylinder (Gripper)
- Origin: Mainland China
- Certification: CE (where applicable)
2.2 Model Designation and Options
The MHF2 series model numbers indicate specific configurations. Refer to the diagram below for a detailed breakdown of the model designation system.
- Number of fingers: 2 fingers
- Bore size (mm): 8, 12, 16, 20
- Action: D (Double acting)
- Stroke: Nil (Short stroke), 1 (Medium stroke), 2 (Long stroke)
- Body option: Nil (Axial piping type), R (Side piping type)
- Number of auto switches: Nil (Without auto switch, Built-in magnet), S (1 pc.), N (2 pcs.)
2.3 Applicable Auto Switches
The MHF2 series grippers can be equipped with various auto switches. The table below details the electrical entry, wiring, load voltage, and applicable load for each switch type.
Note: Water resistant type auto switches can be mounted on the above models, but SMC cannot guarantee water resistance. Lead wire length symbols: 0.5 m - Nil, 1 m - M, 3 m - L, 5 m - Z. Auto switches marked with "o" are made to order specification. When using the 2-color indicator type, please make the setting so that the indicator is lit in red to ensure the detection at the proper position of the air gripper.
2.4 Detailed Dimensions
Refer to the following diagrams for detailed dimensions of various MHF2 series models and their auto switch mounting grooves.
2.5 Auto Switch Mounting Groove Dimensions
Proper mounting of auto switches is crucial for accurate operation. The following diagrams illustrate the mounting groove dimensions for various models.
3. Setup and Installation
Careful installation is essential for optimal performance and safety. Follow these guidelines for setting up your MHF2 series gripper.
3.1 Mounting the Gripper
- Ensure the mounting surface is clean, flat, and rigid enough to support the gripper and any applied loads.
- Use appropriate mounting screws (refer to detailed dimension diagrams in Section 2.4 for thread sizes and depths) to secure the gripper firmly.
- Avoid overtightening mounting screws, which can deform the gripper body or impair its function.
3.2 Pneumatic Connections
- Connect the air supply lines to the designated ports on the gripper. Refer to Figure 2.1 for axial or side piping types.
- Ensure all connections are secure and leak-free. Use appropriate thread sealant if necessary.
- Verify that the air supply pressure is within the recommended operating range for pneumatic grippers.
3.3 Auto Switch Installation (Optional)
If using auto switches for position sensing, install them into the designated grooves. Refer to the auto switch mounting groove dimensions in Section 2.5.
- Carefully slide the auto switch into the groove until it reaches the desired sensing position.
- Secure the auto switch using its retaining screw, ensuring it is snug but not overly tight.
- Connect the auto switch wiring according to the electrical entry and wiring specifications provided in Figure 2.2.
- For 2-color indicator types, adjust the switch position until the indicator lights up red at the correct sensing point.
3.4 Initial Checks
- Before applying full power, manually check the gripper's finger movement for any obstructions.
- Ensure all pneumatic and electrical connections are correct and secure.
4. Operating Instructions
The MHF2 series grippers operate using compressed air to actuate the fingers for gripping and releasing objects.
4.1 Basic Operation
- Apply compressed air to the 'Open' port to extend the gripper fingers.
- Apply compressed air to the 'Close' port to retract the gripper fingers, thereby gripping an object.
- The MHF2 series is double-acting, meaning air pressure is required for both opening and closing actions.
4.2 Gripping Force Adjustment
Gripping force can typically be adjusted by regulating the air pressure supplied to the gripper. Lower pressure results in lighter gripping force, while higher pressure increases the force. Always operate within the recommended pressure range.
4.3 Using Auto Switches
If auto switches are installed, they provide feedback on the gripper's open or closed position to a control system (e.g., PLC). This allows for automated sequencing and verification of gripping operations.
5. Maintenance
Regular maintenance ensures the longevity and reliable operation of your pneumatic gripper.
5.1 General Maintenance
- Cleanliness: Keep the gripper and its surrounding area clean and free from dust, debris, and corrosive substances.
- Lubrication: Ensure the air supply is properly lubricated if the gripper requires it (check specific model requirements). Many modern pneumatic components are designed for non-lubricated air, but always verify.
- Fastener Checks: Periodically check all mounting screws and other fasteners for tightness. Retighten if necessary.
5.2 Inspection
- Air Leaks: Regularly check for air leaks around fittings and seals. Leaks can reduce efficiency and gripping force.
- Finger Movement: Observe the gripper's finger movement for smoothness and consistency. Any jerky or inconsistent movement may indicate an issue.
- Wear and Damage: Inspect the gripper fingers and body for signs of wear, damage, or corrosion. Replace worn or damaged parts promptly.
- Auto Switches: Verify that auto switches are securely mounted and functioning correctly (e.g., indicator lights responding as expected).
5.3 Storage
If storing the gripper for an extended period, ensure it is clean, dry, and protected from extreme temperatures and corrosive environments.
6. Troubleshooting
This section provides solutions to common issues encountered with pneumatic grippers.
| Problem | Possible Cause | Solution |
|---|---|---|
| Gripper not moving or weak gripping force | Low air pressure Air leaks Obstructed fingers Incorrect port connection | Check air supply pressure and regulator settings. Inspect all pneumatic connections for leaks and tighten. Remove any foreign objects obstructing finger movement. Verify air lines are connected to the correct ports. |
| Inconsistent or jerky movement | Contaminated air supply Lack of lubrication (if required) Internal wear or damage | Ensure air supply is filtered and dry. Check lubricator settings (if applicable). Inspect for internal damage; consider professional service or replacement. |
| Auto switch not detecting position | Incorrect switch position Faulty wiring Damaged switch | Adjust auto switch position in its groove. Check electrical connections and continuity. Replace the auto switch if damaged. |
| Excessive noise during operation | Loose mounting Misalignment Worn internal components | Tighten mounting screws. Check for proper alignment of the gripper and workpiece. Inspect for wear; consider professional service. |
7. User Tips
- Air Quality: Always use clean, dry, and filtered compressed air to prevent premature wear and ensure reliable operation.
- Pressure Regulation: Utilize a precise pressure regulator to fine-tune gripping force, especially when handling delicate objects.
- Finger Design: Consider custom gripper finger designs for specific workpiece geometries to maximize grip stability and minimize damage.
- Cycle Speed: While these grippers are designed for speed, excessive cycle rates without proper cushioning can lead to increased wear. Balance speed with component longevity.
8. Warranty and Support
For information regarding warranty coverage, technical support, or spare parts, please contact your authorized SMC distributor or the seller directly. Ensure you have your product model number and purchase details available when seeking support.