I am a beginner at 3D printing. There is a a loud squeaking noise when the print head moves rapidly. I have a creality ender v3 Ke about 4 months old. The z and y aixes have been greased. The extruder has been replaced. The fans sound OK. No error messages on the display. The prints are sharp, so I assume the nozzle is ok. The nozzle temperature is set to 210. Any help would be appreciated. Chris