Operating the machine in this way is basically identical to doing so in the driver's platform: As soon as the remote control was activated, a specially developed lamp console above the cab indicated whether the roller was ready for operation. If the light was "green", the roller could be started, stopped and steered by remote control. Furthermore, the vibration frequency and working speed could be adjusted, and the dozer blade could be operated. "A large display on the remote control displays the driving direction and speed at all times. Furthermore, the operator can clearly see the operating data from the drum and engine, meaning that they can guarantee that the roller operates safely. Basically, with this remote control, we are moving the driver's platform outside," observed Hans-Peter Patzner, who is responsible for this special project at HAMM as an engineer for control technology. In the meantime, there were already additional applications for the remote-controlled compactor: From time to time, it is used on surfaces where mining or special geological cavities in the ground are to be expected.
Process optimisation thanks to a new dozer blade
However, the two H 20i C P compactors in the Wilhelmsglück quarry still had more to offer because HAMM also developed a new dozer blade for this project. The background: In peak times, up to 6500 t material is delivered to the quarry each day and spread using caterpillar vehicles. To cope with these enormous volumes, an additional caterpillar vehicle and an additional roller would have had to be procured. Two machines would also mean two drivers. But this would be problematic because, according to Sabine Voß, Procurement Manager for Compaction Technology in Construction Machine Technology at LEONHARD WEISS: "Qualified personnel are a rare commodity these days. In particular, it is difficult to find new people to operate special machines. It was therefore important to us to master the backfilling with one machine that can be operated by our current employees."
Developed for the job in hand, in dialogue
This therefore led to the idea of modifying the dozer blade from HAMM's product range for the new compactors. In particular, this involved increasing the dozing volume, and a shape that is adjusted to the heavy material. A prototype was built very quickly. LEONHARD WEISS tested it on various construction sites with different operators. "We have a lively, balanced dialogue with HAMM, in which the developer takes on board the feedback from the operators and the Logistics team, and incorporates this into the design. This ultimately led to the very machine that we need in our quarries," says the representative from the Special Technology department. "The roller drivers are satisfied. They are happy to work with the H 20i C P dozer roller."