Design
Installing the Elliptec Motor is as simple as it gets. It is mounted by its spring so that its tip is pushed against the movable object.
The motor must be installed with the correct mounting geometry in order to insure proper performance and function.
- rotary installation
- linear installation
linear configuration rotary configuration
The driven element can have a linear or rotary configuration. You find linear and rotary drive solutions under services in the download sector.
Physical dimensions
Due to its small dimensions, the Elliptec Motor can be integrated into the tightest spaces.
Driven Element – Material
As motor power strongly depends on the rotor material, materials with high stiffness and sufficient dimensional stability under heat should be used.
Polymers are particularly suitable, primarily thermosets (duroplastics) with a graphite/carbon filler (e.g., PF7595 by Hexion Specialty Chemicals GmbH).
For some applications, thermoplastics with at least 50% glass-fiber content are also suitable (IXEF 1032 by Solvay).
Glass, ceramics, and steel may be used as well but often generate running noise.
Soft materials such as non-anodized aluminum or wood are not suitable.
www.hexion.com www.solvay.de
Friction Losses in Bearings
The spring maintains a force of up to 4N between the motor tip and the driven element. The bearings must be able to support this load without causing excessive friction losses in them. Low bearing friction is optimal both in linear and in rotary applications.
Linear bearings
The support for a push rod can have a simple design. Antifriction bearings are recommended. In low-cost applications, three to four balls (e.g., made of polymer) may be used. Slide bearings are not recommended for linear applications.
Rotary bearings
Since rotary friction loss depends on the bearing material and the diameters of the axle and the wheel, the following rule of thumb should be considered: The diameter of the axle should be no more than one twentieth of the wheel diameter. For wheel diameters of 15-30mm, we recommend axles with 1mm diameter.