Applimotion Infinity Arc-Segment Direct-Drive Motors Review: Specs, Price and Applications
Applimotion Infinity uses thin arc-shaped motor segments for partial-arc or full-rotation direct drive. Electromate’s listing describes a family with 112–765 mm outer diameters and 20–40 mm axial lengths. The segments give a machine designer unusual freedom around a large aperture, while transferring guidance, support and thermal integration to the OEM mechanism.
Quick Verdict
Worth considering for large-aperture rotary mechanisms where a conventional cylindrical motor or gearbox obstructs the layout. Size the required arc and force-to-torque relationship explicitly; this is an engineered motor integration rather than a ready-made rotary stage.
Applimotion Infinity Arc-Segment Direct-Drive Motors at a Glance
Specification | Details |
Family | Infinity arc-segment motors |
Manufacturer brand | Applimotion |
Listed supplier | Electromate |
Listed continuous torque range | 0.65–63 Nm; family/configuration dependent |
Listed peak torque range | 1.95–190 Nm; family/configuration dependent |
Listed outer diameter range | 112–765 mm |
Listed axial length | 20–40 mm |
Motion geometry | Partial-arc segments or combined full rotation |
Design and Engineering Assessment
Torque depends on tangential force and the effective radius. Changing the arc diameter or the number of active segments alters the useful torque and thermal design, so a family maximum should not be applied to every custom geometry.
The motor segments do not replace the bearing system or establish runout and wobble specifications. Guidance, encoder placement, air-gap control and differential thermal expansion belong in the OEM design and should be checked together with the drive.
The Motor Kit and the Finished Axis
A frameless motor supplies the electromagnetic rotor and stator, leaving the machine designer to provide the surrounding axis. Bearings, encoder, housing, retention and electrical protection remain essential parts of that assembly. The direct-drive arrangement can remove transmission backlash, but mechanical compliance and feedback error still influence performance at the load.
Diameter, active length, air gap and winding choice interact with the required torque and speed. The available central opening can be a major design advantage for routing services through a joint. It also affects the surrounding structural layout, so motor selection and bearing selection should progress together instead of treating the motor as a late add-on.
Thermal and Mechanical Integration
Continuous torque depends on the thermal conditions of the integrated assembly. Holding position can produce substantial winding losses without useful mechanical output, while a repeated acceleration cycle imposes its own RMS current demand. The stator housing and cooling path must be designed around those operating conditions. A peak-torque figure is not a continuous-duty allowance.
Rotor retention and concentricity are fundamental to reliable operation. Assembly forces, magnetic attraction and thermal expansion require appropriate fixtures and tolerances. For a high-speed design, balancing and containment become important alongside the electromagnetic calculation. These are responsibilities of the finished axis design, not features that can be assumed from the motor kit alone.
Feedback, Control and Acceptance
A direct-drive axis needs a suitable encoder and a drive capable of controlling the chosen winding. Encoder mounting and reference alignment affect commutation and position control. Evaluate torque ripple, settling and tracking with the real load and structure; removing a gearbox changes the balance between motor torque, inertia and mechanical stiffness.
Acceptance should include the intended motion cycle and stationary holding periods at operating temperature. Check the full mechanical envelope and the behavior of cables or services routed through the center. Preserve the winding data, encoder alignment and drive parameters so that a later motor or feedback replacement can restore the qualified axis.
Applications and Selection
Large-aperture gimbals, scanning mechanisms, metrology and imaging assemblies requiring a thin direct-drive motor arrangement.
For Applimotion Infinity Arc-Segment Direct-Drive Motors, define the actual machine duty before selecting an ordering configuration. Include the required operating point, available installation space, environment and control interfaces. The specification table describes the product or family; the surrounding machine determines which of those features matters for the intended job.
Price and Value
Price: Request a quote for the exact configuration. Compare the product, compatible control equipment, required mechanical parts, cabling and commissioning as one installed system. A component price alone does not represent the cost of a working automation axis.
Evaluate an alternative against the same duty and acceptance criteria. Match the continuous operating requirement first, then compare transient capability, feedback, mechanical fit and support. This avoids choosing between superficially similar products whose ratings describe different operating conditions.
Pros and Cons
Advantages
Partial-arc geometry and large central access
Thin direct-drive construction without a reduction gearbox
Limitations
Requires OEM bearings, feedback and motor integration
Torque and dimensions refer to different family configurations
Who Should Consider Applimotion Infinity Arc-Segment Direct-Drive Motors?
Consider Applimotion Infinity Arc-Segment Direct-Drive Motors for large-aperture gimbals, scanning mechanisms, metrology and imaging assemblies requiring a thin direct-drive motor arrangement. Establish the required operating point and installation interfaces before choosing the configuration, and use a representative loaded cycle as the acceptance basis.
Applimotion Infinity Arc-Segment Direct-Drive Motors FAQ
What is Applimotion Infinity Arc-Segment Direct-Drive Motors?
Applimotion Infinity uses thin arc-shaped motor segments for partial-arc or full-rotation direct drive.
Which specifications matter most?
Family: Infinity arc-segment motors. Manufacturer brand: Applimotion. Interpret the remaining ratings within the selected configuration and operating duty.
What applications should it be considered for?
Large-aperture gimbals, scanning mechanisms, metrology and imaging assemblies requiring a thin direct-drive motor arrangement.
What is the main advantage?
Partial-arc geometry and large central access. Thin direct-drive construction without a reduction gearbox.
What limitation affects integration?
Requires OEM bearings, feedback and motor integration. Torque and dimensions refer to different family configurations.
What is the price?
Request a quote for the selected model, options and delivery terms. Any stated example price applies only to its identified seller configuration and may change.
How should an alternative be compared?
Use the same operating duty, installation envelope and acceptance requirements. Compare the complete system, including the compatible drive or controller, mechanical interfaces and commissioning effort.
What should be specified when ordering?
State the complete model or configuration, intended operating point, mechanical interfaces and required control equipment. Include the relevant environment, accessories and quantity so that the quotation describes a usable system.
Prices are indicative and may change. Confirm the final configuration, commercial terms and delivery schedule before ordering.
