day one of my first reprap build! (Prusa)
The lower part of the Y belt loop (teeth side) is making contact with the middle threaded bar - is this normally that close and/or touching? I've even reversed the direction of the vertical smooth rod clamps to try and maximize the clearance... still slightly touching... in the meantime, I've covered the threads with electrical tape to at least keep the travel smooth.
I've tried to look at other's builds, but that part is usually obscured by the build platform. I'll take a picture if needed.
