RATTMMOTOR MMP25 3D Trigger Edge Finder Touch Probe

1. Product Overview

The MMP25 probe is a precision 3D contact measuring sensor specifically developed for CNC milling machines, engravers, and machining centers. It utilizes optical signal transmission without wired connection for various applications, including workpiece zero setting, edge finding, hole positioning, contour measurement, and automatic tool setting. This device accurately detects X/Y/Z three-axis coordinates, significantly improving machining accuracy and reducing manual positioning errors.

Figure 1: RATTMMOTOR MMP25 3D Trigger Edge Finder Touch Probe

2. Package Contents

The standard package includes:

• 1 x 3D Precision Tool Setting MMP25 Probe

Please note: The package does not include batteries. Due to customs regulations, products with batteries cannot be transported.

3. Technical Specifications

Figure 2: Product Components (Probe, Probe connector, Pilot tape, Grip part of the handle, Probe front cover, Adjusting screw, Battery cover)

4. Product Features

• High Precision: Higher alignment accuracy and repeatability up to 0.001mm.
• Omni-directional Trigger: Features an elastic trigger mechanism with sensitive response and no dead angle for measurement.
• Wireless Transmission: Infrared optical wireless signal transmission eliminates cable winding interference during spindle movement.
• Robust Construction: High-precision aluminum alloy shell with mirror finish, suitable for precision molds, aluminum alloy, and metal parts.
• Integrated Power: Built-in rechargeable lithium battery for convenient USB charging, removing the need for frequent battery replacement.
• Standard Shank: Ø25mm cylindrical shank, compatible with ER32, ER25, and other common CNC machine tool holders.
• Durable Design: Dustproof and oil-proof sealing structure, designed to withstand workshop cutting fluid and iron filings environments.
• Enhanced Z-axis Measurement: Provides more comprehensive Z-axis measurement capabilities.
• Ceramic Probe: Adopts a ceramic probe for better accuracy retention and stability.
• Optimized Oscillation: Larger probe oscillation amount helps prevent errors that could lead to probe damage.
• Non-Conductive Material Measurement: No need to rely on conductive principles, allowing measurement of non-conductive materials or when the machine tool spindle is not conductive.
• Replaceable Stylus: Features a replaceable stylus assembly, allowing users to switch different length/diameter probes according to processing needs.

Figure 3: Probe with battery and ceramic tip highlighting product features

5. Setup and Installation

5.1 Initial Installation

1. Mount the Probe: Clamp the MMP25 probe firmly into the machine tool spindle tool holder, ensuring no shaking during high-speed movement.
2. Install Infrared Receiver: Install the infrared signal receiver on the machine head side. Align the probe's emission window with the receiver's receiving window.
3. Receiver Wiring: Complete the receiver wiring according to your CNC system's signal definition. Connect the trigger signal to the machine's input port.

5.2 Probe Adjustment (Calibration)

After mounting the 3D Photoelectric edge probe on the machine:

1. Check Runout: Rotate the spindle to check the runout of the probe ball.
2. Adjust Runout: The ball of the probe is adjusted with four M3 set screws until a runout of 0.01mm is obtained.
3. Tighten Screws: Once the desired runout is achieved, tighten the M3 set screws. The probe is now ready for use.
4. Power On and Calibrate: Power on the probe. Calibrate trigger repeatability by manual jog before formal measurement.

6. Operation Guide

6.1 Application Functions

• Automatic workpiece origin zero setting (X/Y/Z axis zero point quick calibration).
• Edge finding: Quickly detect workpiece left/right, front/back boundary position.
• Inner/outer hole center positioning, circular workpiece coordinate centering.
• Height measurement, step surface difference detection.
• Automatic tool length offset correction.
• Batch processing coordinate automatic compensation, reducing manual operation time.

6.2 How to Use the Probe

To use the 3D Photoelectric Edge Probe:

1. Positioning: According to the position of the workpiece to be measured, move the probe to the approximate position of the workpiece.
2. Approach: Use a step-by-step approach to gradually bring the probe closer to the workpiece until contact is made.
3. Macro Programs: Write macro programs according to your CNC system to realize automatic edge finding and zero-setting cycles.
4. Retract Probe: After measurement, retract the probe to a safe height to avoid collision between the stylus and workpiece fixture.

Figure 4: The probe indicating contact with a red light

Figure 5: Step-by-step approach of the probe to a workpiece

6.3 Compatible Equipment

• CNC milling machines, mini engraving machines, machining centers.
• Control systems: Mach3, GRBL, Siemens, Fanuc, MITSUBISHI, and other mainstream CNC systems with probe signal input.

7. Safety & Maintenance Instructions

1. Control Feed Speed: Strictly control the probing feed speed. Always slow down the approach speed to prevent stylus bending and damage to the probe's internal elastic structure.
2. Avoid Impact: Prevent strong impacts, heavy collisions, or axial overload pressure on the tungsten steel ball stylus.
3. Regular Cleaning: Regularly clean the probe body, stylus, and infrared transmitting/receiving window to remove cutting fluid, metal dust, and oil stains.
4. Battery Management: Charge the built-in battery promptly when a low power prompt appears. Do not store the probe with a completely discharged battery for extended periods.
5. No Unauthorized Disassembly: Do not disassemble the probe body privately. Internal precision elastic components will lose accuracy after disassembly.
6. Replace Stylus: Replace the stylus assembly immediately if the tungsten steel ball is worn, deformed, or loose, to ensure measurement precision.

8. Troubleshooting

For detailed troubleshooting steps and common issues, please refer to the comprehensive user manual PDF. If you encounter problems not covered in this manual, contact customer support.

9. User Tips

• The MMP25 probe is highly accurate; users have reported excellent repeatability, often achieving 0.01mm accuracy across X, Y, and Z axes when properly calibrated.
• Ensure the probe is securely clamped and calibrated for optimal performance and accuracy.

10. Warranty and Support

For detailed warranty information, service terms, and additional support, please refer to the official user manual PDF available at: MMP25 User Manual (PDF).

You can also contact RATTMMOTOR customer service for further assistance.