Using the new control knob option, the pitch may be adjusted while the drive is moving without changing motor speed; there no need for gear reduction. The pitch adjustment option enhances both positioning accuracy of the drive unit and control over linear speed in linear motion applications. The pitch control option bypasses the previous notched settings on a scale by using a worm gear and threaded rod design. To change linear pitch, the operator turns a control knob on the end of the threaded rod. This may be done safely while the drive is operating-there is no need to stop the system or adjust any other controls. A pitch indicator moves along the scale as the control knob is turned. The worm gear option permits virtually infinitely adjustable pitch throughout the 10:1 adjustable pitch range. This fine tuning capability means the operator has more accurate control over the drive unit's linear position along the travel path. This affords both operators and designers a variable speed linear drive system that does not require clutches, cams or gears. Once the linear pitch is set on a drive, it remains constant, regardless of the drive motor speed or other control settings. The new pitch control option may also be retrofitted to existing linear drives.
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