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10 - VF/VM - 40T - Spindle Motor

VF/VM-Series - Service Manual


  • 1 - VF/VM - Introduction
  • 2 - VF/VM - Specifications
  • 3 - VF/VM - Installation
  • 4 - VF/VM - Umbrella Tool Changer
  • 5 - VF/VM - HSK - SMTC
  • 6 - VF/VM - 40T/50T - SMTC
  • 7 - VF/VM - Axis Motion
  • 8 - VF/VM - HSK - Spindle
  • 9 - VF/VM - 40T - Spindle
  • 10 - VF/VM - 40T - Spindle Motor
  • 11 - VF/VM - 40T - Gearbox
  • 12 - VF/VM - 50T - Spindle
  • 13 - VF/VM - 50T - Gearbox
  • 14 - VF/VM - Lubrication Systems
  • 15 - VF/VM - Electrical Control
  • 16 - VF/VM - Chip Removal and Coolant
  • 17 - VF/VM - Workholding
  • 18 - VF/VM - Maintenance
  • 19 - VF/VM - Autodoor
  • 20 - VF/VM - Robot and Automation
  • 21 - VF/VM - Enclosure

Go To :

  • 10.1 40T Pin Drive Motor - Replacement
  • 10.2 40T Spindle Motor - Troubleshooting
Recently Updated

40T - Pin Drive Motor - Replacement


Applies to machines built after August 2016

Introduction

New motors ship with non-contact encoders (NCE's). If you have an early NGC machine you may have a magnetic encoder and will need to order the new cable for the NCE encoder before you make any repairs.

Replacement

1

Remove the sheet metal surrounding spindle motor [1].

Remove TSC or air purge assembly [2].

Unplug encoder cable and ground [3].

Remove terminal block cover and disconnect wires from terminal black.

Note: Remove motor mounting screws and rotate motor 90° for easy access to terminal block.

connect lifting hooks to bracket.

Remove motor.

Note: Make sure transfer tube is still fully seated into spindle drawbar after removing motor.

2

Lift new motor from shipping crate.

Lightly stone mounting surfaces [1],[2] with alcohol and wipe clean.

Apply Red-I Grease to motor coupling groove [3] and motor coupling pins [4].

 

 

 

 

3

Verify the 3 rubber bushings for the pins are still installed to the spindle coupler and are not crushed [1].

Ensure transfer tube is seated on drawbar [2].

Align pins in motor coupler to holes in spindle coupler and lower slowly with caution.

Lightly rotate spindle nose to help align if necessary.

Once motor is fully lowered and seated, install motor plate screws hand tight.

Re-connect wiring for encoder and terminal block.

Re-install TSC or air purge.

4

To align motor to spindle:

Run spindle at 1000 RPM clockwise/forward for 30 seconds.

Run spindle at 1000 RPM counterclockwise/reverse for 30 seconds.

Run spindle at 1000 RPM clockwise/forward for 1 minute.

Snug mounting screws while motor is running.

Note: When motors stops it will jolt to the side and misalign if not snugged down.

Note: The Octavis Vibration Analyzer can be used when aligning motor to find where vibration displacement spike is the smallest.

Torque screws per Haas Torque Specifications.

Run the mill spindle vibration test per Mill - Spindle Vibration - Tolerances.

Re-install the sheet metal assembly.

Introduction

  1. Drive shaft
  2. Power leads
  3. Over-temp sensor connector

Symptom Table

Symptom Possible Cause Corrective Action

Alarm 123 SPINDLE DRIVE FAULT

Alarm 236 SPINDLE MOTOR OVERLOAD

Internal short circuit. Test the spindle motor.
Failed temperature sensor. Test the overheat sensor.
Over-aggressive application. Adjust the program.
Vector drive shorted. Test the vector drive.
Vector drive fans failed.
Cable connection incorrect or loose. Inspect cables and connections.
The spindle motor cable is shorted.
Wye/Delta contacts burnt or shorted. Test the Wye/Delta.
Spindle encoder belt worn or damaged. Examine the encoder belt.
Alarm 254 SPINDLE MOTOR OVERHEAT Over-aggressive application. Adjust program.
Spindle fan failed. Check spindle fan and cable.
The input cable for the spindle head does not have a ferrite filter. Make sure the 33-9090 cable has a ferrite filter installed at connection P39 on the I/O PCB. If the cable does not have a ferrite filter installed, install one. (P/N: 64-1252).
There is a problem with the temperature sensor on the spindle motor. Remove the spindle head cover. Examine the temperature sensor on the spindle motor. Make sure that the cable is not damaged and that it is firmly connected.

Motor noise.

Poor finish on parts (Inline only).

Determine if the problem is mechanical or electrical.
  1. Run the spindle to where the noise is heard.
  2. Turn off the machine.
  3. If the noise is still heard then the problem is mechanical.
  4. If the noise goes away then test all the electrical components in the spindle drive system.
Vibration due to damaged bearings. Do a vibration analysis.
Coolant contamination. Inspect the TSC union for leaks.

Spindle Motor Test

Corrective Action:

Disconnect all the wires from the terminal block that come from the electrical cabinet.

Use a multimeter to check these terminals on the motor:

  • Measure between motor leads or terminals (1-4) (2-5) (3-6). If the difference between each pair is more than 0.1 Ohms, replace the spindle motor.
  • Measure between motor leads or terminals (2-4 and 3-4) (1-5 and 3-5) (1-6 and 2-6). If the multimeter reading is not open (O.L.), replace the spindle motor.
  • Measure between each individual motor lead or terminal and the motors armature. If the multimeter reading is not open (O.L.), replace the spindle motor.

Vector Drive Test

Corrective Action:

Press [POWER OFF].

If the vector drive voltage indicator light is on, do not touch the electrical components. The high voltage in the control cabinet can kill you. Wait for the voltage indicator LED on the vector drive to go off completely.

Inspect the vector drive.

Disconnect terminals 2 and 3 and check for a short to the spindle motor circuit by measuring the resistance of terminal 2 to 9, 10, and 11. Measure terminal 3 to 9, 10, and 11.

Go to Vector Drive - Troubleshooting Guide to troubleshoot the vector drive.

Wye/Delta Inspection

Corrective Action:

Check for loose connections or burn marks.

Go to Wye-Delta Contactor - Troubleshooting Guide to troubleshoot the Wye/Delta contactors.

Spindle Motor Cables Test

Corrective Action:

  1. Disconnect all the spindle motor cables from the amp/vector drive (terminals A, B, C. + GND).
  2. If machine is equipped with a Wye-Delta contactor, disconnect the cable going to the motor. (L1,L2,L3 + GND).
  3. Disconnect the spindle motor cables from the motor, including the ground cable.

     Important: At the motor end put electrical tape to each lead to make sure the leads do not touch each other.

  4. At the electrical cabinet end, using a meter test for resistance across each lead. Take the same readings from the cable that goes to the motor from the Wye-Delta contactor.
    • If the meter reads O.L. then the cable is good.
    • If the meter reads a short circuit or low resistance the cable needs to be replaced.

Make sure all cable connections are not damaged. Use a multimeter to test each cable connection.

Regen

Corrective Action:

Disconnect the REGEN load leads from the vector drive at terminals 1 and 2. Measure the resistance across the leads. The reading must be as follows:

  • 2-resistor box: between 9.5 and 12.5 ohms.
  • 3-resistor box: between 6.3 and 8.3 ohms ohms. (As shown in the illustration.)
  • 4-resistor box: between 4.6 and 6.6 ohms.

Go to Vector Drive - Troubleshooting Guide to troubleshoot the vector drive.

Go to REGEN - Troubleshooting Guide to troubleshoot the REGEN resistors.

Spindle Fan

Corrective Action:

Check for airflow on top of the spindle enclosure. Make sure there is air flow out of the spindle enclosure when the spindle is commanded to run. DT/DM were setup to blow air down onto the motor but it should now be blowing out the top. Change the fan direction to blow out the top.

Run this command in MDI: S50 M03;

Check the voltage across the black and red wires on the I/O PCB at this location:

  • P32 if the machine has a Next Generation Control

The voltage should be 120 VAC. If no voltage is present, the I/O PCB is bad.

Encoder Belt

Corrective Action:

Make sure the encoder belt is adjusted correctly and is not damaged. Replace a damaged or worn belt.

Make sure the encoder pulley is not damaged. Make sure the set screw is tight.

Program/Application

Corrective Action:

Reduce the axis feed rate, or adjust the spindle rpm in the program.

Check for dull or damaged tooling.

Coolant (TSC Only)

Corrective Action:

Remove the head cover and inspect the TSC union for leaks. A leaking coolant union may cause coolant to get into the motor and wash the grease out of the bearings.

Bearings

Corrective Action:

Damaged bearings in the spindle motor can cause finish issues on the part. Contact your local HFO for a vibration analysis to see if the bearings are damaged.

Electrical Diagrams: Spindle Encoder Feedback / Drive Command

FIND DISTRIBUTOR
Feedback
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