I have recently built my second VC3.1 500 and have added FMMM and an extrusionless X. My resonance and accelerations are quite a bit lower than the first machine I built and I'm scratching my head as to why.
The tool head doesn't move at all when I manually move the gantry forwards and backwards, the belt does walks up and down a bit on the pulley but it doesn't seem to be chewing it up. Checked all bolts and tried to keep the umbilical cables tight. They're in a nylon sleeve with 1mm piano wire. The machine is sitting on a table but it's pretty sturdy... I will try and put it on the floor and test but anything else I should look in to? Thanks!