:We actually answered that a few weeks ago Wikipedia : Reference desk / Archives / Science / 2011 July 25 # Lead screws primarily using the article ATG linked above talk ) 17 : 57, 28 August 2011 ( UTC)
22.
Some multiturn potentiometers have a linear resistive element with a sliding contact moved by a lead screw; others have a helical resistive element and a wiper that turns through 10, 20, or more complete revolutions, moving along the helix as it rotates.
23.
For electromechanical linear actuators used in laboratory instrumentation robotics, optical and laser equipment, or X-Y tables, fine resolution in the micron range and high accuracy may require the use of a fractional horsepower stepper motor linear actuator with a fine pitch lead screw.
24.
The advantage of linear motors is that they can produce linear motion without the need of a transmission system, such as a ball-and-lead screw, rack-and-pinion, cam, gears or belts, that would be necessary for rotary motors.
25.
It's essential for forming threaded parts like screws, but it contains as one of its essential components a long lead screw, so there's a nicely-encapsulated bootstrap problem there . talk ) 15 : 03, 5 May 2007 ( UTC)
26.
A recirculating ball nut and lead screw assembly ( on say a large motor car with five and a half turns of the steering wheel between lock and lock ) gives a lot of mechanical advantage without the backlash inherent in other gearing systems such a rack and pinion.
27.
A lead screw is sometimes used with a split nut also called half nut which allows the nut to be disengaged from the threads and moved axially, independently of the screw's rotation, when needed ( such as in single-point threading on a manual lathe ).
28.
A low lead screw pitch ( i . e . 5 turns per inch or fewer ) means when the driving motor power is removed such as by turning the machine off, the weight of the spindle will cause the lead screw to rotate as the spindle motor falls down.
29.
A low lead screw pitch ( i . e . 5 turns per inch or fewer ) means when the driving motor power is removed such as by turning the machine off, the weight of the spindle will cause the lead screw to rotate as the spindle motor falls down.
30.
A traveling-nut linear actuator has a motor that stays attached to one end of the lead screw ( perhaps indirectly through a gear box ), the motor spins the lead screw, and the lead nut is restrained from spinning so it travels up and down the lead screw.
