Weekend is close and i got no response from Carbide3D so far, so maybe anybody else can help me with my current issue:
After some smaller cuts I start to make “bigger” parts out of T6061 Aluminum.
If have done a lot of test cuts for speed and feed rate and feel now very comfortable with my setting.
(0.125 End Mill, 200-400 mm/Min, 0.12 mm/Cut, Plunge 10 mm/sek, @8000 RPM, with a coated End Mill (2 Flutes).
At the weekend I discover some strange noise from my nomand. After about 30-60 minutes the spindle (maybe the motor, or belt drive)
sounds like a baby bird (high pitch, short period like: https://www.youtube.com/watch?v=s4sFsU8vCqs).
If I let the nomad run, the noise will return in shorter periods until the spindle stops complete.
I discover that it is possible to prevent the spindle from stopping with a little bit of WD-40 (just a little bit, on top of the spindle).
(BTW I use an active cooled spindle/motor/z-axis to keep the temperature below 40-50 °C).
Since the Spindle stops at a run with only 120 mm/Min, I m pretty sure that there is something wrong with my Nomad.
What do you thing? Any suggestions?