Hi,
Have a x1c with around 900 hours of print time.
Getting an odd sound almost like a playing card getting caught on the spokes of a bicycle wheel.
After lots of googling. A piece of plastic rubbing against a belt makes sense.
But I can see any, used compressed air on all the pulley wheels. Retentions belt and cleaning carbon rods.
Nothing help. It almost sounds like it’s the extruder that is catching on the belt but that can’t happen.
Any help much appreciated.
Thanks
When was the last time you did a full maintenance clean up?
Especially on the x axis.
Does the x axis feel smooth by moving it by hand with the power off?
Full maintenance a week or so ago.
Cleaned the carbon rods, retensioned belts, cleaned and superlubed Y and Z rods, cleaned and superlubed Z axis screws.
Compressed air the extruded gear and the belt pulleys. Also lubed the idler pulleys.
Think that is the major mechanical things. Some of the above I do weekly.
The only resistance is what I’d expect due to the belts moving the pulley wheels.
Good on you for performing maintenance. I guess it could be a mechanical problem then. Maybe pass your vid on to support.
The only other time i heard something like this was on my printer and it was poop in the rear z lead screw area. I had to buy a one foot long tweezer to get it out. 
Did you check the z-axis belt under the printer?
No tbh.
I’ve read about it but thought as the noise only happens with X axis movement rather than the bed raising and lowering it wouldn’t be that.
That does make sense.
Maybe switching off the printer and moving the toolhead by hand helps in locating the source?
There’s one thing that might help clarify this discussion. Would it surprise my friends here on this forum to learn that there isn’t truly an X or Y movement in the printer? It might sound odd, but try this experiment:
Turn off the printer so you’re not fighting the stepper motors.
If you’re hearing an odd sound or trying to isolate a faulty stepper or pulley, here’s a trick to help identify which belt, pulley, or stepper motor combination is causing the noise:
Create a single-layer test sheet the size of your printer bed. If you don’t know how, here’s a quick guide:
a) Create a cube primitive.
b) Scale it to 200x200x0.20mm and center it.
c) Select the cube from the objects menu.
Adjust the strength settings like this:
This will create a 45-degree test pattern using the default orientation, allowing you to observe the isolated print head movement.
To test in the opposite direction, simply change the angle here:
This will give you a 90-degree offset and let you isolate the other assembly.
If you want to save time, you can create two smaller objects (half the size), which will work similarly. While it won’t give you a full travel test, it should still help diagnose any noise you’re hearing.
Have u found a solution in the end? My x1c has 1300 hours and noticed that sound similar to yours, started at about 1200 hours. I’ve contacted the support and after seeing my logs they send to me an x axis replacement dude to resistance on the carbon rods. Better than nothing, the sound is improved but unfortunately not the sound for the motivation I’ve written to them. Isn’t bad as yours but definitely isn’t there before. Also I’ve changed the x axis and the belts and when I performed this operation and the gantry was free to move there isn’t any sound like this. So I’m assuming is some pulleys or maybe the head, yesterday I’ve unmount al the cover from the head, also the filament cutter, extruder and nozzle to be sure isn’t they fault and noise still here. I’ve also put some lubricant in the front pulley as the tensioner pulley and also x axis pulley. No luck at all, support just want me to print a test file but this don’t resolve my issue. Maybe the printer just print normal (apart for vfa and ghosting) but if I want this machine to live longer I need to fix this mechanical problem. Like I said before I’ve unmounted the head as the rear panel but I’m not able to locate at 100% the problem, at first to me it seems front pulley fault but yesterday it seems is in the head but don’t have any sense because of the facts I’ve changed the x gantry so it can’t be and the belts doesn’t move in the head. When I have some time I take apart also the right and maybe left panels to see if I’m able to locate the source.
