Development status

  • Increase in the transmitted torque (rotation) from 5 (generation 1) to 7 Nm (generation 2) in continuous operation. (Damage in the one-off fracture test at > 24 Nm)
  • GFRP and CFRP rods now available in profiled version. Maximum length of 1 m. See price list. Weight CFK: 170 g/m, GFK: 200 g/m, Aluminum 270 g/m

Development status

Our beta tester special offer has been running since the end of December. So far approx. 30 customers have been sent samples and approx. 20 customer-specific tests are running. More samples are being produced to keep up with the demand.

Applications areas / industries:
research centers (Fraunhofer, DLR, international universities), robot builders (service, maintenance, handling), camera work, antenna alignment, medical technology, rehab, orthotics, industrial handling systems.

Provisional datasheet (German / English) to download (PDF)

Current status of the product development

The revised, new version of the articulated robot joint is now available as a prototype. The following product improvements have been achieved:

  1. lower cable friction due to less narrow cable guide for the rotational motion (newly laid Bowden cables with optimized friction couple => see figures)
  2. New design of the transition from articulated joint to rod, creating transfer of torques in the region of up to approx. 15-20 Nm (or 5-10 Nm in continuous operation). There will also be three versions of articulated rod from the end of December 2009: aluminium (affordable), CFK (extremely light, but expensive) and GFK as an intermediate solution.
  3. Integration of magnetic sensors to measure and transfer the current angle positions in the articulated joint. Work is still being done on this point. Space for the sensor system is provided, the technical design of the sensor mechanism should be completed in spring 2010 and integrated in the samples.

After extensive trials we assume that at least the following torques can be transferred with the articulated joint in continuous operation:

  • Transferable torque for the pivot movement: 10 Nm
    drive force (cable tensile strength) for this: max. 400N
  • Transferable torque for the rotational movement: 5 Nm
    drive force (cable tensile strength) for this: max. 400N


  • Weight 1 robolink incl. cables: 380 g
  • Weight of aluminium rod: 270 g/m
  • Weight of carbon fiber rod: 150 g/m

 The articulated joint has the basic dimensions shown below:


First articulated joint by the end of this year

We originally wanted to manufacture injection molded tools in connection with the HMI in order to produce the product as shown.Increase the transferable torques by means of design improvement to the transfer between articulated joint and rod, reduce cable friction by making changes to the design and materials, but above all: integrate magnetic sensors to measure and transfer the current angle positions in the articulated joint.

These, in our view, necessary improvements will, however, delay the planned injection molding production. We assume that by the end of this year we will be able to present the first finished articulated products, which are then produced by injection molding.

We would like to apologize to you for having published a production deadline in the euphoria of the Hanover Messe, which we have not kept.
We ask for your understanding over the technical development of the products and the associated delay.

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