The CNC spindle is the heart and soul of your machine tool. Motor City Spindle Repair is here and ready to get your machine back up and running. However, the spindle is just like the human heart inside of a body, and has other components that need to be performed properly in order for the machine to function. 

Ball screws, servo motors, way covers, drawbars, gearboxes, etc. are all machine components Motor City Spindle will want to repair or re-manufacture new for you.

What are some signs that a spindle is fading?

• Vibration felt within the machine.
• Chatter marks showing on the parts/poor finish.
• Producing out of tolerance profile size, taper, roundness of the part.
• Inability to properly dress the grinding wheel.

Spindle jerks/vibrates badly on startup and performs poorly

This indicates single phasing. Verify connections at spindle, VFD, and any connectors.

Send the spindle to us for motor diagnostics and repair.

Spindle is running hot

• Verify that your cooling system (liquid, compressed air, electric fan) is operational.
• Monitor current draw during the cut. Higher than normal current shows a dull tool or excessive feed rate.
• If the spindle is too noisy to rotate by hand, it is likely a bearing problem.

Spindle will not turn

• Attempt to turn the spindle by hand. If it rotates freely, proceed. If not, it has been actuated while running or the bearings are severely damaged.
• Verify sensor logic is correct and reading properly.
• Check that the tool clamp/unclamp valve is not leaking.

Tool is not clamping/unclamping or not holding the tool tightly

• Verify pull studs are the correct type for your spindle.
• Verify sensor logic is correct and reading properly.
• Check for broken clamp group (gripper segments).
• Drawbar/spring pack assembly could be damaged. 

If you are having unusual issues with your CNC spindle, or other components, reach out to us. Email Lauren@motorcityrepair.com or click here to fill out a form.