The exhibitors of the SPS 2026 are expected to be published in spring 2026. Until then, you can find the exhibitors and products of the SPS 2025 here.
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Shaft motors with contactless magnetic counterweight
Shaft motors with contactless magnetic counterweight
Description
Shaft motors with contactless magnetic counterweight
When shaft motors are used vertically, a counterweight is required to compensate for the gravitational effect. Without a counterweight, the motor shaft would fall down in the de-energized state. In conventional designs, the spring counterweight is a critical component because the spring ages over time and requires special attention to maintenance. A new, maintenance-free counterweight called gLESS uses magnetic force and enables uniform movement. The counterweight realizes a stable movement and is maintenance-freeCompared to the spring counterweight, the magnetic counterweight offers the following advantages:
- The "spring constant" does not change even after many years of use.
- The shaft does not fall down without current.
- Almost no scattering of magnetic flux
- Compact solution in combination with the manufacturer's shaft motor.
- Constant balancing force.
- Non-contact function ensures that there is no maintenance.
The gLess series is available in 3 sizes in diameter (Ø13; Ø18; Ø18mm), and covers force ranges of 2.66; 6.1 and 19.6N, with a working stroke of 40 mm. The gLESS components are designed as a non-contact solution and can be mounted very close to the shaft motor.
NEW: Based on the scale-free linear motor SX060, manufacturer NPM has launched a complete linear motor unit on the market, which is equipped with gLESS counterweight. The linear motor does not require an external encoder and has almost no magnetic leakage fluxes, which means that compact applications with more than one motor with a distance of only 9mm can be realized
- Pipette Chidori project: (https://youtu.be/JGIOjzdX3lQ)
- gLESS counterbalance: https://www.youtube.com/watch?v=Zl6tVf4Gtho




