In large-scale CNC machinery or precision heavy-lifting applications, a single central drive can often lead to “crabbing” or structural deflection. This Two Ball Screws Drive Simultaneously CAD drawing provides a robust mechanical solution for driving wide carriages or heavy loads with balanced force. By utilizing two parallel ball screws driven by a single motor via a specialized transmission system—such as a common timing belt or a linking shaft—this design ensures that both sides of the moving assembly travel at the exact same velocity. This synchronization is critical for maintaining perpendicularity and preventing the binding of linear bearings in wide-span gantry systems.

By downloading this professional drawing, you get a complete engineering layout that focuses on rigidity and timing accuracy. The design includes detailed mounting configurations for the ball screw supports, the motor interface, and the synchronization components. This setup is ideal for high-precision tasks like large-format 3D printing, laser cutting, or automated pick-and-place systems where mechanical stability is non-negotiable. The blueprint also accounts for thermal expansion and alignment tolerances, providing a field-tested framework that reduces the risk of mechanical vibration and extends the lifespan of the precision screw threads.

Key Features:

  • Perfect Mechanical Synchronization: Employs a single-motor input coupled with a high-strength timing belt or torsion shaft to ensure zero lag between the two screws.
  • High-Load Load Distribution: By splitting the driving force across two screws, the system can handle significantly heavier payloads without increasing the diameter of the individual ball screws.
  • Anti-Deflection Gantry Support: Specifically designed to prevent the “skewing” effect common in wide-span gantries, ensuring the bridge remains perfectly square to the guide rails.
  • Precision Tensioning System: Includes integrated belt tensioners or shaft couplers that allow for fine-tuning the phase alignment between the two screws.
  • Integrated Bearing Blocks: Features detailed specifications for fixed and floating support units (BK/BF style) to manage axial loads and allow for thermal expansion of the screws.