| 摘要 |
A winder has an extra section. The extra section includes a gripper; and a brake, for controlling a wire force without having to change a pitch diameter of the gripper or a sprocket. The wire winder, is controlled by, as a tower travels around a tank, generating a square wave from the wheel drive; feeding said square wave to a counter and counting the square waves; comparing the number of counts with a number selected by an operator for a spacing location; powering a proportional hydraulic valve, and thereby pressurizing fluid into an elevator hydraulic motor; thereby rotating the motor until the spacing counter has counted the pre-selected number; and shutting the hydraulic flow. Epoxy is used to protect seismic cables from liquids.
|
