DGShape Italia created a video on replacing the spindle unit (11 minutes):
The instruction sheet from Roland can be found as a downloadable PDF at the bottom of this article.
NOTE: If you replace the spindle unit immediately after some milling activity, do not touch the spindle unit or the surrounding areas immediately after milling. The spindle unit and surrounding areas are very hot immediately after milling, and touching them may result in burns. Either let the unit cool down, or be extremely careful with where you put your hands and fingers.
1. Prepare Spindle for Replacement
1. Check the Spindle Unit and the Milling Bur.
Move the spindle unit into the standby position, and turn the power on.
If the milling bur is attached to the spindle unit, press the operation button on the main unit to remove it. Contact with the bur can cause injury, so it's important to remove it.
2. Set the Spindle Position to Spindle Replacement.
VPanel will appear.
If you cannot find VPanel in the task tray, start it from the Windows Start screen/menu.
How to start VPanel from the Windows Start screen/menu
Right-click the background of the Start screen. The app bar will appear. Click
All Apps/Roland DWX-51D/VPanel for DWX-51D.
From the Start menu, click
All Programs (or Program)/RolandDWX-51D/VPanel for DWX-51D.
Click the Tools icon .
Click Maintenance tab, then Spindle replacement. This will move the spindle into the correct position for replacement.
Once the spindle has moved into the replacement position, switch off the main unit's power, and remove the power cord from the unit.
When performing replacement work, switch off the main unit's power, and remove the power cord from the unit. Replacing the Spindle while the machine is connected to a power source may result in injury or electrical shock.
2. Replace the Spindle Unit
1. Open the maintenance cover.
Open the front cover, then the maintenance cover.
2. Loosen the screws securing the motor stay.
Loosen the three screws about two turns: you do not want to remove them, just loosen them.
3. Remove the belt from one side.
Push the milling machine toward the left at the location indicated to remove the belt from the motor pulley.
4. Remove the spindle unit.
Remove the four screws, and slowly pull both the spindle belt and the spindle unit straight out.
NOTE: When removing the parts, make sure that the spindle unit does not come into contact with the conductive plate.
3. Attach the New Spindle Unit
1. Set the belt onto the new spindle unit.
Using an appropriate new belt, make sure the white line is on the outside of the belt.
2. Attach the spindle unit.
Set the spindle unit onto the pins.
Note: Make sure the belt is not pinched behind the spindle unit. Make sure the spindle unit does not come into contact with the conductive plate.
3. Secure the spindle unit.
Secure the spindle unit with the four screws.
4. Set the belt on the motor pulley.
Push the milling machine toward the left at the location indicated to set the belt on the motor pulley.
5. Adjust the belt position.
Rotating the motor pulley will cause the belt to move. Rotate the pulley back and forth to adjust the belt to the correct position.
6. Secure the motor stay.
Tighten the three screws.
4. Adjust the position of the conductive plate
1. Check the position of the conductive plate.
Verify the following. Do not proceed unless all three are true. If your current setup does not meet the three requirements below, do not proceed.
- The conductive plate and the spindle unit are not in contact with each other.
- The conductive plate and the spindle unit do not come into contact with each other or produce an abnormal noise when the motor pulley rotates.
- The distance between the conductive plate and the spindle unit is 0.7 mm or less. (For your reference, the conductive plate is 0.2 mm thick.)
Once your setup meets the above three requirements, proceed to the next step.
2. Adjust the position of the conductive plate.
Loosen the screw.
Rotate the adjustment screw to the left or right to move the conductive plate to a position that meets the requirements.
3. Secure the conductive plate in position.
Tighten the screw to secure the conductive plate in position. Verify that the conductive plate is in a position that meets the requirements.
4. Close the maintenance cover, and then close the front cover.
5. Operation after Replacing the Spindle Unit
1. Reset the work time of the spindle unit.
Display VPanel. Click the Tools icon, click Maintenance tab, and finally the Reset button.
2. Run in the spindle unit.
Failure to run in the spindle may result in unstable spindle rotation. Refer to the manual included with the milling machine for how to perform the work.
Check for abnormal noise during run in. If an abnormal sound is generated, the conductive plate may be in contact with the spindle. Review the steps in Section 4. Adjust the position of the conductive plate and try again.
3. Perform automatic correction of the milling machine.
If automatic correction is not performed, the cutting results may be undesirable. Refer to the manual included with the milling machine for how to perform the work.