Bob,
Good piece of work. Have you started lapping the ways and have you been able to check your table for flatness.
I'm sorry, Bob. I know it seems like I'm trying to give an extremely busy man, more tasks.
I'm also courious as to where Bill's backlash is growing. With Aaron's Zaxis Mod, I believe he stated the the attachment piece that goes through the plate, that supports the head, can pull all the way through (I can't think of the correct name for this Z axis ball nut mount). If that is the case (assuming that I understand correctly what he said) then without that mod it could be dangerous, if this piece pulled all the way through and it could allow the head to drop.
I hope that I stated my concern that correctly.
I was just giving Z axis backlash some thought and I would think that with the Z Axis, and the weight of the head, that you would have a minimal backlash, where the weight of the head would essentially preload the ball screw and on the angular bearings. I could see having backlash when using a single ball nut with a Gas spring, but am having problems visualizing backlash with 200lbs riding on the ball nut and the angular bearings.
Feel free to straighten out my thinking process!!
Ron  |