John's Alu Profile build

[Evengravy]

Hi John, It's looks great. In relation to the resonance you are experiencing in the Y axis are you running the machine with the Y axis unmounted to a surface or base? Do you only experience this when running the machine with the spindle on or off? Your selection of steps per revolution will also come into play with resonance as I myself experienced something similar. Endless tweaking and trying different combinations of steps per rev and mucking about with acceleration and deceleration settings got rid of it for me. Where are you based in Ireland? Liam.

Hey, thanks. Currently no base, I'm still considering the best approach for building the base at the moment. Some are quite unconventional lets say but I want to run high flow flood coolant for milling aluminium so I'm going to think about liquid capture etc. I'm going to try and CAD design some ideas over the weekend. I'm a bit limited with the current lockdown in sourcing what I would need anyway so no stress just yet. The vibration was really just coming from the screws themselves without the spindle running, which weren't great quality and not straight either. So, partly crappy ball nuts with lots of friction and play, partly non straight ballscrews plus a coupled hollow cavity = resonance. I'm not too concerned with the resonance part, that's in my field of expertise (I'm an acoustics/audio specialist) more concerned with the smoother motion that the new screws will provide plus hopefully less play (I'll need to measure that again today). I intend to fill the Y rails with either sand, pea gravel or epoxy granite to get rid of that resonance. I'll probably go cheaper options first and see where it is. I can measure the natural resonant frequency pretty easily and try to tune around it too. I'll keep those points in mind for sure though on tweaking, thanks for that.

I'm based in Donegal buddy, you?