ballscrew z axis
Ok, this may be a stupid question, but I'm confused. A ballscrew moves very easily, I just got one in for my z axis, the rest of the router is R&P. The slightest bit of force moves the nut down the screw, it's very cool actually.
Right now I have a 1/2-10 acme screw on the z axis. I am in the habit of getting my piece cut, letting the router move itself back to 0,0,1" and shutting off the control box/stepper motors. In its current setup, the router sits there, the acme screw makes it stay put. If I put a ballscrew on it, and shut down the steppers with the router at 1" on the z, it will come crashing down...
So... how do you prevent this? I guess you could zero out the z every time, but without taking the bit out each time, the router would just be resting on the bit... that can't be good for it...
What do others do with this situation?
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