General-Purpose Door Drive

This Product Spotlight looks at an evolved version of a previous door drive. 

In the last eight years, Zagro AG, together with Computec S.r.l., has developed the Computec Door Drive 6 (CDD6), including a new handset, app and CANopen. This is a general-purpose door drive and is an evolved version of the previous door drive, CDD5. Some additional features are implemented, such as the addition of Wi-Fi and new motor control with the ability to drive multiple motors together. CDD6 is able to drive DC brushed and brushless motors up to 40 V with or without encoder feedback.

Parallel to this, the IP54 protected Dunker motors and SIBONI 1Nm and 2Nm DC motor with encoder were launched. The CDD6 supports the regulatory requirements of both EN 81-20, as well as EN 81-1 (selectable via the software settings).

The company offers adapter kits, compatibility replacement kits for other door drive types and replacement/modernization sets. 

Zagro AG

After several years of experience in various management positions in Switzerland and Italy, Rudolf Grob decided to step into self-employment in 1987 and founded Zagro AG in Uitikon Waldegg. Based in the idyllic agglomeration of Zurich, Switzerland, the owner-managed family business has been active in the elevator industry worldwide for more than 35 years. The company specializes in the following core competencies, among others: 

• Trade in products of all kinds, especially consumer and capital goods 
• Sales, marketing and product development 
• Mediation of commercial transactions and production orders  

Grob said:

“Over the years, we have built up an extremely well-founded and strong network in the international lift industry and have a broad customer portfolio. These years of maintaining contacts, as well as our distinctive know-how, make us the ideal partner in consulting, mediation and support in all areas of the elevator world.” 

Zagro AG has five employees located in Zurich, and the company’s typical clients are door manufacturers and elevator companies. The company is looking to expand its modernization solutions in the future. 

The company’s mission is to create real added value for its customers through innovative solutions and the highest quality in everything we do. It strives to develop long-term partnerships by working reliably, creatively and being customer oriented. As a small team, Zagro AG attaches great importance to close cooperation, flexibility and individual support in order to always offer the best possible service. 

Computec 

Computec S.r.l. was founded in 1992 by brothers Paolo and Ugo Lagi. Computec S.r.l. is a small company dedicated to the sale of services and products for the IT market and the realization of small projects for the electronics sector. In 1993, Computec S.r.l. began working with Sematic Italia SpA to develop drives for controlling lift door motors: the company’s main market for many years. In 1998, Computec S.r.l. entered into a partnership with Sematic Italia SpA, opening up potential new growth prospects; thus, Computec S.r.l. was born.

In 2012, Computec S.r.l. certified its quality system to IS0 9001; in the same year, it qualified its personnel to the IPC Standard. In 2016, the first Computec-branded door drive was born (CDD5). Then, production technology was improved by introducing a high-performance SMT line (FUJI NXTIII). In 2025, Ugo and Paolo Lagi acquired the minority stake held by Sematic, confirming Computec S.r.l.’s intention to operate in the lift sector independently. 

Computec S.r.l. has approximately 90 employees located in Lonato del Garda (Brescia), a town near Lake Garda, Italy. The total area of the company reaches 6,500 m². The company’s clients include B2B, companies operating in different sectors, especially lift, motor control drive and industrial automation. Thanks to the collaboration with Zagro AG, Computec S.r.l. is able to sell its products worldwide. 

The CDD6 will be on exhibition at LIFTEX in London on June 11–12 — Stand A10 and at interlift 2025 in Nuremberg, Germany, on October 14–17 — Hall 4A, Booth C402.