For example, a linear actuator using an integral horsepower AC induction motor driving a lead screw can be used to operate a large valve in a refinery.
12.
Master recordings are cut on a recording lathe where a sapphire stylus moves radially across the blank, suspended on a straight track and driven by a lead screw.
13.
The bearings support axial loads of thousands of newtons in either direction, and must hold the ball lead screw to ?.002 mm across that range of loads
14.
A special case of this cam is "'constant lead "', where the position of the follower is linear with rotation, as in a lead screw.
15.
Another advantage is that they do not have a lead screw, so they can be drilled successfully in a chair leg without having the lead screw peek out the other side.
16.
Another advantage is that they do not have a lead screw, so they can be drilled successfully in a chair leg without having the lead screw peek out the other side.
17.
A second drive technique is illustrated by the Squiggle motor, in which piezoelectric elements are bonded orthogonally to a nut and their ultrasonic vibrations rotate and translate a central lead screw.
18.
The solution to prevent back-driving is to use a finer ( higher ) lead screw pitch ( i . e . 10tpi or greater ) or have a locking mechanism.
19.
Precision stages such as those used for optics do not use a lead screw, but instead use a fine-pitch screw or a micrometer which presses on a hardened metal pad on the stage platform.
20.
In early days, before televisions came standard with 75? coaxial antenna connectors, cable boxes came with adapters that would allow the coaxial cable to connect to the 300? twin lead screws used with traditional antennas.
