Hi, I am just powering up the spindle for the first time on my self-designed CNC milling machine.
I bought a 2kW water-cooled, chinese VFS and spindle. I have a provisional clamping and water cct filled but not pumping.
I ran up for about 20s to 50Hz max ( 3000 rpm ) , just enough time to attain control speed and power off again. On stopping I notice a dry squeaky noise. I suspected my clamping maybe distorting the body so slackened right off. Still there.
These have pretty low runout spec and ( allegedly ) german bearings, so fairly tight.
I wondered if anyone with experience of these spindles can tell me whether it is normal and well run-in , or if I have a problem.
I did a quick video of a quick stop/start. The squeak is heard at beginning and end.
TIA.
http://www.solaire-chauffe-eau.info/cnc/00008.mp4
BTW Firefox internal player seems not to produce the audio. Save and view with VLC or similar if that happens