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The core: the saw carriage body
In the course of developing the steel-plate body, HOLZMA attached great importance to a torsion-resistant, heavy-duty, compact basic design. Computer-aided finite element calculations allowed the ideal combination of rigidity and weight saving to be determined. The result is maximum dynamics and precision.
Another aspect that underwent scrutiny was the overall size of the saw carriage. The goal was "as compact as possible"; this was the only way to achieve the ergonomic, comfortable working height of 920 mm. Furthermore, the size of the saw carriage also has a positive effect on the overall size of the machine body and thus on transport costs – an important aspect when shipping saws in containers.
Running smoothness
The new 3 series owes its running smoothness to the two guides (guide rods) on the machine base and the rollers on the saw carriage, on which the latter moves. HOLZMA used to use "eccentric rollers", but has now replaced these by "spring-loaded rollers" (patent pending). "The spring load ensures that the rollers maintain contact with the guide. They are far better able to compensate for production tolerances and wear," Peter Gröning explains. "The result is the running smoothness that is so appreciated by users of the new 3 series and that we are able to ensure for years."
Patent pending:
New vertical postforming
In addition to normal postforming, for example for the production of kitchen fronts, HOLZMA now makes "vertical postforming" possible. This allows the edges of entire books of parts to be scored. The technology, for which a patent application has been filed, allows scoring to a maximum depth of 15 mm, making it particulary suitable for veneer, paper and ABS edges.
For this new optional extra, it must be possible to raise the scoring saw to achieve 90 mm saw blade projection. This required extensive changes to the saw carriage and redesigning of the machine body in the angular fence area,
Patented:
Fully-automatic, camera-controlled scoring saw adjustment
This award-winning, patented optional extra is familiar from the 5 series. It caused quite a stir at its launch in 2007. HOLZMA has adapted this time-saving technology and now also offers it for the 3 series. By doing so, the machine manufacturer makes the work involved after changing saw blades a lot easier for small and medium-sized companies too.
"Although this is the classic 'top-down approach' of a well-known technology," comments Head of R&D Peter Gröning, "it was not quite as simple as it sounds. This was because the saw carriage of the 5 series offered a lot more space than was available in the new 3 series. We had to think in completely new directions. The envisaged selling price posed another challenge for the new saws; it was to be on a par with the price of the old 3 series. But we managed it and found a new solution for which we also have a patent pending."
Energy efficiency
20% less energy consumption than the previous models – that was the target the HOLZMA managerial board set the engineers for the new 3 series.
As originally implemented in the 5 series, and now in the 3 series too, it is no longer the main saw motor that is raised but only the saw blade – saving energy and increasing dynamics. The main saw blade is positioned by means of linear guide with rocker (patent pending); this is continuously variable, fast, precise, entails little wear – and saves energy. In addition to this, HOLZMA has replaced the pneumatic system with a hydroneumatic system. This system does not work solely with air pressure, but also with oil pressure. This guarantees long-term precision of the saw blade projection, because oil can be controlled with a greater degree of precision than is possible with air.
HOLZMA saves expensive compressed air on the one hand at the main saw, by now raising the saw blade by means of just one cylinder, and on the other hand at the scoring saw, which is no longer raised pneumatically, but by an electric motor.
The new design of the saw carriage has allowed HOLZMA to redesign the extraction system to achieve much greater efficiency here too. Furthermore, the "light sensor with blower unit" now no longer uses expensive compressed air, but instead makes use of the dry wind resulting from the blades of the main saw motor.
Proven features retained
Proven HOLZMA technologies are also to be found in the new saw carriage. These include the Power-Loc system for fast, easy saw blade change and the continuously variable saw carriage speed.
The side aligner, which ensures material is precisely positioned before cutting, is another of the classic HOLZMA features. The engineers have implemented further improvements to this technology: the contact pressure with which parts are aligned can now be varied – depending on whether a single part or a book of parts is being aligned. The height of the parts/book is measured fully automatically via the pressure beam. The contact pressure can then either be entered manually or stored for each specific material, with the "material-dependent parameters" option, and then automatically retrieved when needed.
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