JBEC router system UNDER THE BONNET

[JAZZCNC]

I think JAZZ would agree that we provided timely and comprehensive details when asked (if a bit waffley ey Jazz? )

Yep I agree on both counts Esp the Waffley. .

There is a video of me perched on the machined bed. And subsequently on the Gantry. I''m tipping the scales at over 90kg... 90kG is about 880N. no rude comments please... ... So that is 90kg going through the surface area of my scruffy shoes in the middle of the machine - and then around the machine a bit. I then stood on the gantry in the middle - somewhat precariously.

Nice Video not sure of the point has it's mostly meaning less.? . . . It's a CNC machine not a sit on lawn mower.!!

If your going to bother with this stuff then Better IMO to apply some lateral tests simulating real world cutting forces. . . . . Push & pull on the bugger in all directions and lets see how it jiggles.!!

Regards the Motion control card then I'm a big fan of them and thou I haven't tried the one your using I have most others and they can make a huge difference to speed performance (which doesn't mean much to me.!) but more importantly how smooth the motors accelerate and perform.
That said I much prefer Ethernet over USB has it's much more reliable, USB can be touchy and shouldn't be relied upon for providing power has it's very flaky.
Edit 2: Not all motion control cards are equal thou so anyone seeing this and thinking to buy then please checkout before doing so has while they all tend to offer smoother pulse train etc they can lack or be flaky on over features they have to take over from PP, like spindle control, Homing/limits functions, Backlash comp etc.

EDIT: Ok years of tuning race engines has taught me that the ear is a highly tuned indicator showing when things are running nice and smooth.!! . . . When I ear growling noise's I get concerned to why.? (growling = vibration)
The growling I'm hearing I believe to be those linear rail bearing blocks on the Rails.?

So with that I'd request a Video of all Axis disconnected from the ball screws being manually worked both fast and slow.!!