Issue(s):
- While running, the spindle is making loud whirring sounds
- The spindle is making noise but not moving
Resolution(s)
Spindle rotates but makes noise
If the spindle is rotating while making noise, please ensure you have run the Spindle Break-in g-code to redistribute the grease at the spindle bearings. It should take about 2 hours for it to complete. Grease can solidify in cool environments or after long periods of sitting
Spindle makes noise but doesn't rotate
If the spindle is making noise but isn't rotating, there could be an electrical issue with the cable, the spindle, or the VFD.
To test which component is causing the issue, you will need a multimeter to test continuity. Touch the multimeter probes to the pins noted.
Spindle Test
With the multimeter set to continuity, remove the connector at the top of the spindle to gain access to the electrical pins. Tip: Move the spindle to the front of the machine and lower it to the spoil board for easier access.
Note the orientation of the connector locating slots (green arrow). This is important for correct PIN identification.
You should get a response if the connections are good. It doesn't matter what probe touches what pin; there is no positive or negative orientation. Please note that if you touch the unmarked pin, you will not get a response.
With the probes, test the following order pins
Test 1 - Pin 1 & Pin 2
Test 2 - Pin 2 & Pin 3
test 3 - Pin 3 & Pin 1
If the multimeter beeps for each test, the spindle is functioning correctly. Reconnect the spindle cable for the next test.
If any of the tests fail, the spindle is the issue and will need to be replaced.
Enclosed VFD Cable Test
Testing the spindle cable for customers with the enclosed VFD is similar to testing the spindle. Undo the spindle cable from the VFD.
The pins are marked in the connector, but can be hard to see. Pin 1 is by the large notch. Note the orientation of the notches (green arrows).
With the probes, test the following order pins
Test 1 - Pin 1 & Pin 2
Test 2 - Pin 2 & Pin 3
test 3 - Pin 3 & Pin 1
If the multimeter beeps for each test, the spindle and cable function correctly. The VFD has failed and will need to be replaced.
If one of the tests fails, the issue is with the cable and it will need to be replaced.
Unenclosed VFD Cable Test
For this test, the VFD will need to be removed from the machine and unplugged from power. Be sure to allow 5-10 minutes for the power to discharge from the capacitors. Remove the small front cover to expose the wires. The spindle cable should be plugged into the spindle for this test.
With the probes, test the following order pins
Test 1 - Blue wire & Yellow wire
Test 2 - Yellow wire & Red wire
test 3 - Red wire & Blue wire
If the multimeter beeps for each test, the spindle and cable function correctly. The VFD has failed and will need to be replaced.
If one of the tests fails, the issue is with the cable, and it will need to be replaced.
Example of a damaged spindle cable at the spindle connector