Equipped with industry-leading Magnetek® IMPULSE®•G+ Mini drives, STAHL CraneSystems STF chain hoists provide infinitely variable speed for applications requiring precision control, ensuring greater operator safety and lower stress on the crane’s mechanical and control components.

The STF hoist combines the high-performance and reliability you expect from a STAHL CraneSystems chain hoist with the industry-leading design and control features Magnetek provides. The frequency inverter can be connected to field bus systems, such as Modbus, Profibus, or Ethernet. The control technology of the IMPULSE drive not only enables precision movement, but also provides valuable diagnostic and performance information, such as hoist status, through communication with IoT networks.

The STF chain hoist delivers expanded safety options. If the hoist controls detect unintentional movement, (ex: the motor brake slips under load) the hoist drive will stop, and it can no longer be operated until the issue has been resolved. This helps prevent the load from dropping and potentially damaging equipment and injuring the operator. In addition, an overspeed protection device prevents the motor from exceeding its maximum allowable speed range in the event of a drive malfunction, which further protects the hoist from a possible load drop.

The hoist features a 1024 PPR encoder with a simplified mounting for reliable feedback in rugged operation and permits rapid evaluation of speed signals. The quick programming feature of the Magnetek frequency inverter paired with the ease of chain hoist commissioning gives customers a safe, highly reliable, and simple plug-and-play application.

Like all STF chain hoists, the new variable speed model is designed for ambient temperatures from -10° C to 40° C (14°F to 104°F), optionally up to 50°C (122°F) and is suitable for all available mains voltages with a large number of adaptation options.

In addition, the STF chain hoist meets the special requirements of protection class IP54 (optional IP65 / IP67 for outdoor use), which prevents the ingress of water and moisture. The STF is also extremely durable and maintenance friendly, featuring hard-wired control elements in place of commonly used board controls.

Magnetek drives can be parameterized using external software and directly using the input on the display.