Vibration/Squeaking noise when moving on the X axis during print
This is my first print with the MK4. When the external the extruder moves on the X axis for the first perimeter, it moves smoothly, but when the internal perimeter is printed it sound very different and there is an extra vibrating + squeaking noise.
How can I troubleshoot this? When moving the axis manually I don't hear it.
RE: Vibration/Squeaking noise when moving on the X axis during print
On my MK4, I have very similar noises, on the x, z, and y axes. I'm uncertain about the squeaking noise ( I get some of the those also), but I've convinced myself that these loud vibration noises are resonance frequency vibrations being generated by the motors and, amplified by the belts and the plastic to metal interfaces. I haven't setup up any accelerometers to test this theory, but it holds true for me because the noises are absent when moving manually, and in my case, the increased noises peak at specific motor speeds. and your can feel the vibration by touching the motor when operates at the specific speeds. I tested the y-axis across a range of speeds that encompass those where the noises were observable and they demonstrated noise peaks at various speeds that were harmonics of each other. The Z-axis and X-axis noise are also speed specific, but I have not spent as much time on those.
There are numerous threads discussing these noises on all three axes, that often focus on the linear bearings, one way or another. I don't agree that the noise you recorded (which is very similar to what others have posed) could be related to the linear bearing. Typically slow speed linear bearing noise produces a scratching/dragging sound, not a vibration unless the bearing is worn and doesn't have enough grease to prevent the bearings from rattling around. Even then, for the bearing to vibrate something else would have to transmit that vibration to the bearing, because the roller balls are not moving fast enough to cause this noise. If the bearing is dragging on the shaft, this increased drag could cause motor vibration, but you would be able to detect this when moving the axis manually.
On the Y-axis, I was able to reduce the peak noise levels from 80db down to about 60db by increasing belt tension. It seems to tight to me, but this did reduce the peak noise level. It also shifted the speed at which the peak noises occur.
You could try belt adjustments on the x-axis. Others have been able to isolated the part amplifying the vibration and added sound dampening material to deal with it.
Ultimately I think these vibrations are an artifact of the 400 step motors and how the firmware is operating the TMC driver, or maybe the steppers themselves are not up to the challenge of quiet operation.
Post back with any successes you produce so we can all stand to be in the same room as our beloved printers.