Unanswered Z-axis squeals like a pig

Hello,

In another post a while ago someone mentioned tightening the z-axis dudes (which require a tiny allen wrench, which I have). I tightened them as much as possible, and it didn't change my results. It also squeaks very loudly. I've tried oiling the threaded rods everywhere, and it has no change on that sound.

Any advice is appreciated.

Thanks

 

oil or silicone lubricant usually resolves that issue. Maybe try some more oil and run the machine up and down 10-20 times to break it in