The only thing that keeps the gantry down is gravity. The gantry on my current machine weighs around 30kg, so I'm expecting this one to be around 50kg. I'm sure my router will not be able to lift that. (In fact, I hope those cheapo skate bearings will hold up.) The bearings are spaced far apart (28cm) while the gantry is as low as I could get it. The centre of gravity is mid betweed bearings and only some 12cm above the rails, so that a sudden stop after a rapid move will not cause the gantry to fall over.
John |