Internal grinding spindle 80MD120Y1.5:Voltage,380V Frequency,2000HZ Motor Model Three-phase asynchronous motor, constant torque Rotation speed,120000RPM Rated Power,S1:0.9KW,S6:1.5KW

80MD120Y0.9 Spindle Manual

1.Safety and Storage

Safety Instructions

• High Voltage Protection
  The spindle is driven by high voltage from a frequency inverter. Protective measures in compliance with VDE100 regulations must be taken when connecting to the machine power supply. The spindle housing must be grounded to ensure safety from direct and indirect contact. The safety of the equipment during operation is the responsibility of the machine manufacturer.

• Hazard of Rotating Parts
  Contact with rotating parts of the spindle may cause serious personal injury or even death, as well as severe property damage. It is the responsibility of the machine manufacturer to install the required safety structures and provide corresponding alarm signals.

• Protective Devices
  Protective devices must be installed and operated by specialized personnel (e.g., emergency stop switches).

Safe Transportation

• Upon receiving the goods, immediately inspect the packaging for visible damage.
• Carefully open the packaging to check for external damage to the spindle. If damage is found, notify the carrier immediately.

Safe Assembly and Maintenance

• Initial installation and maintenance of the spindle must be carried out by qualified professionals.
• The spindle should only be installed and operated in the specified position with appropriate protection.
• Before operation, ensure all pipeline connections meet the requirements of the outline drawing.
• Prior to maintenance, disconnect the machine from the main power supply and ensure the spindle will not restart. After maintenance, reinstall all safety protection devices such as shields.
• Cleanliness must be maintained during all operations.

Safety Inspection

• The machine and its electrical/mechanical safety devices, as well as high-voltage equipment, must remain in a safe condition and be inspected regularly. Operational and environmental factors should also be considered.

Safe Operation

• Adhere to accident prevention regulations.
• The spindle should only be operated after all prescribed safety devices are engaged.
• Do not touch the rotating spindle.
• Before maintenance, disconnect the power supply and ensure the spindle cannot restart. After maintenance, install all safety devices, such as shields.
• Depending on the grinding wheel diameter, higher rotational speeds lead to greater circumferential velocity, which generates significant centrifugal forces. Therefore, the spindle must operate in a relatively enclosed space.
• When using larger or wider grinding wheels, pay attention to their natural frequency to avoid spindle damage. If such conditions occur, shut down the spindle immediately.
• Only balanced grinding wheels with a residual imbalance ≤ 1.2 g/kg are allowed to operate at high speeds.
• During the entire speed range, the vibration velocity of a spindle equipped with a grinding wheel and freely rotating should not exceed 1.5 mm/s.
• Spindle vibration is classified into three categories based on velocity:

• Possible causes of increased vibration velocity:

  • Unbalanced grinding wheels or rods at high speeds.
  • Improper grinding parameter selection.

• Do not use hammers or similar tools to strike the spindle, as this may damage the spindle bearings.

• Do not rotate the spindle without securing it properly, as this may cause injury.

• Only use replacement parts specified by the manufacturer.

2. Motor Configuration Parameters

3. Power Connector Wiring Instructions

The power connection for the spindle motor is from INTOCONTEC (model: 6FX2003-0LA00-I, 6FX2003-0LU00-I). Pin definitions and descriptions are as follows:

4. Motor and Spindle Cooling

The spindle motor utilizes an internal water-cooling structure. Simply connect the water pipes as per the wiring diagram.

Cooling Water Requirements:

• Inlet temperature: 18–25°C
• Corrosion inhibitor: Add 25% anti-corrosion rust inhibitor
• Flow rate: 3L/min
• Cooling capacity: 350W
• Solid material filtration: <400 μm

The maximum mixing ratio for the anti-corrosion rust inhibitor is 25% by volume. If the operating environment temperature is below freezing, it is recommended to add antifreeze. Avoid installing and preparing cooling water under extreme conditions to prevent sedimentation, corrosion, or freezing of water.

Before operating the spindle, verify that the motor temperature and cooling water signals are functioning properly.

5. Technical Requirements for Oil Mist Lubrication System

• Before using the spindle, compressed air must be connected to the oil mist lubrication system. Allow oil mist to enter the spindle before starting it. (To observe the oil mist condition, it is recommended to use a transparent PU pipe for the oil delivery pipe leading into the spindle.)

Technical Requirements:

• Compressed air must be filtered and dried.
• Filtration precision: 0.5 μm
• Water and oil removed; residual oil content: 0.5 mg/m³

3. Installation and Operation

1. Installation

Upon delivery, inspect the transportation packaging for any external damage. Carefully unpack and inspect the spindle for visible damage. If damage is found, contact the carrier immediately.

2. Preparation

• Use a hoist or lifting device with sufficient carrying capacity to handle the spindle.
• Only fiber straps around the spindle housing or lifting eye bolts should be used to lift the spindle. Do not lift it by the rotating shaft.
• Clean all holes and pipelines before connecting them to prevent debris from entering the spindle.

3. Mechanical Connection

• The spindle must not bear excessive pressure during installation. Excessive pressure on the housing may cause deformation, increase the bearing load, and affect operational precision, temperature, and lifespan.
• The spindle should only operate in its designated installation position.

4. Electrical Connection

• The spindle must be grounded. Ensure conductivity and apply anti-corrosion protection during grounding.
• During installation, connect the ground wire before connecting the power supply phases; during disassembly, disconnect the phases before disconnecting the ground wire.
• All sockets must be properly and fully inserted or unplugged.

5. Sensor Connection

The spindle is effectively controlled through multiple sensors. Ensure all sensors are connected as specified to ensure proper operation.

6. Test Operation

Pre-Operation Checklist:

• Verify the following before each operation:

Operation Steps:

If the spindle has been stationary for a long period (more than two weeks) at room temperature or below, protect the bearings by gradually increasing the speed during startup:

4. Maintenance and Repair

1. Maintenance

The spindle should be maintained monthly according to the table below:

2. Common Faults and Analysis

3. Repairs

After a period of use, if the spindle bearing or shaft accuracy fails to meet requirements, repairs are necessary.
High-speed spindle assembly and repairs require professional technicians and proper testing conditions. If these conditions are unavailable, send the spindle to the manufacturer for repairs to ensure quality.

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