@Whosa_whatsis They said that they had to move the bowdens tube from the left rear to the right when they moved the unit. A tech noticed that the curve changed direction. That’s when they started making changes. I know what you mean about bend radius as I’ve seen that on smaller units. And not just deltas.
@Matej_Rozman , all the pulleys are concentric. That was one of the first things we looked at. We were also worried about stretching the belts - we did have them tight enough that one snapped, so we eased off a little and the problem changed. It’s somewhere in the motion system; pulleys, belts, etc.
@ThantiK this reminds me, I run T2.5 belts and have changed to GT2 and was really dissapointed. The way GT2 are constructed is very bad (Neoprene Rubber, Fiberglass Reinforced GT2 vs Polyester with steel wire reinforced T2.5) , they are wery strechy things, mine machine is pretty big, uses almost 2m of belt for one tower, and the GT2 acted almost like bugee. Have switched back to T2.5, much happier with it. And, maybe, just maybe, bad belt(s). Could be…, but this pattern you are getting is most definately from the drivetrain…somewhere. Hope you solve it, interested to hear what is/was really the issue.
One of my 2.5 belts has a spot where apparently the belting spliced. It was substantially harder than the rest and would make issues going round the pulley. Could pull the belts off and see if they are like that.
I do not know the structure of your glide rail bearings. I have the Rostock Max and therefor the cheapskate bearings. With them, too much tension on the sides or the front/back will cause noise that should be quite easy to hear. You may try clipping a microphone to your tower with the air holes covered or just stick your ear to the top of the tower. I like using a microphone and the SpectralView Android app so I can See the sound of the issues. You should be able to diagnose and quality test your machines much better that way, since you will see ever little issue that pops up in certain audio frequencies. If you care to humor me there, give it a shot and tell me how you like it.
One other possible cause for the wave distortions could maybe be the motor, I suppose, but I doubt that is the case.
@NathanielStenzel v-rail (makerslide) with delrin V-wheels. The whole assembly has nearly no friction and doesn’t make a sound.
Trust me…a cellphone with a clip on microphone (tape over air holes) and SpectralView will pick up something in the movement. If not the sliding, then it would pick up the sound of the belts moving.