CNC Spindle Not Working? Check These First.

Spindle's stopped. Machine's stopped. Production's stopped. Before you reach for the phone — give this two minutes first. 

• Alarm code on screen? Write it down. Don't just click past it. 

• Door fully shut? All interlocks happy? Check before anything else. 

• Open the cabinet — is the spindle drive showing fault lights? 

• Check air pressure. No air = no tool change = spindle won't play. 

• Look at the toolholder. Swarf on the taper or a damaged holder causes grief every time. 

 

Drive faults usually show as a clean alarm code. Mechanical faults — worn bearings, dodgy drawbar — show up as noise, heat, or a surface finish that makes you wince. 

If it's grinding or running hot: stop it now. Every minute you keep running costs more in repairs. 

 

Stop resetting and hoping. If the same fault comes back, it's not having a bad day — it's telling you something's wrong. 

Third reset and you're gambling with an expensive part.