I've noticed that there are some abnormal noises developing in the machine and would like to get ahead of the issues prior to a major failure.
One is a chatter at the start of a carving while the spindle is moving up and down at the left side of the rail checking board depth; it doesn't do it at any other time. A second noise that just started is hard to explain but sorta like a bad bearing (perhaps) and there has developed with this noise a very high frequency vibration that is quite noticeable when touching the cover over the motor vents. This last issue has developed in just the last two days of use. No problem with carving quality and everything seems to be tight and clean.
Where should one start to identify the source and correct. Machine has 132hrs on the cut motor and 156hrs of servo time; to date no parts have been replaced. Flex shaft running cool on a two hour carve. Seems to be quite early for needing motor brush or bearing replacement according to the maintenance schedule.
Appreciate any guidance.