Planning
Are you planning to use an electromechanical drive product? Here you will find the essential planning information crucial for successful application. Discover how precision and accuracy, smart space utilization, innovative bearing concepts, and the right choice of rotation prevention can revolutionize the performance and reliability of your drives.
FAQs about Planning
What's the difference between static and dynamic self-locking?
Both terms describe the ability of a spindle not to "slip" on its own when at a standstill.
Static self-locking refers to a thread angle between 2.4°-4.5°. In standstill, the spindle does not slip on its own, but it might not come to a stop on its own from motion. Dynamic self-locking occurs when there is an additional braking action from the dynamics. The thread angle is then smaller than 2.4°.
What is a rotation prevention needed for, or when is it necessary?
A rotation prevention is always necessary. Due to the sliding friction in the thread, the applied load would simply rotate along with it, and there would be no relative motion (linear motion).
The higher the axial force on the thread, the higher the frictional force, as Fr = FN * µ.
When does a lifting drive have self-locking?
Self-locking is achieved with a pitch angle below 4.5 degrees.
How accurately can the linear chain position?
- When under pressure load: depending on the control, 100% repeatability can be achieved.
- Under changing loads: the control system must consider the backlash at the sprocket and manufacturing tolerances in the chain links.
What needs to be considered in the planning of linear chain systems?
- The load must always be guided
- Acceleration should be controlled via a ramp
- The chain cannot perform a swiveling movement
- The permissible buckling length must not be exceeded
What is the function of pillow block bearings?
Pillow block bearings are used in lift systems with mechanical coupling (i.e., connecting shafts). The bearings shorten the free length of the connecting shafts, thereby preventing oscillation at high speeds.
Can the fixed bearing be omitted?
No, a fixed bearing is fundamental in any drive system. Without a fixed bearing, reliable axial movement cannot be performed.
Can the floating bearing be omitted?
Yes, for short spindles or low speeds, the spindle is sufficiently dimensionally stable without additional radial bearings at the spindle end.
What do I need to consider in my system when transporting people?
When transporting people, DIN EN ISO 17206 applies. This standard for event technology defines the required safety measures, safety devices, and system-relevant shutdowns.