Sanders featuring at least one cross belt unit, either inside or outside of the machine body. These machines are mainly used for lacquer/high-gloss work or the sanding of cross veneered surfaces.
The cross belt unit located at the machine outlet, also known as high gloss unit, is mainly used for intermediate lacquer sanding up to high gloss work. Thanks to decades of experience and constant development the high gloss unit features a wide array of features that make it the first choice of surface specialists with highest demands.
The only 22mm (0.85 inch) thin segments in the segmented pad are electronically controlled by one of the most advanced softwares in the industry. In order to prevent rounded or damaged corners the sanding pressure can be precisely controlled for each workpiece edge (front/back, left/right). The belt speeds for the sanding belt as well as the chevron sanding belt conveyor can be individually adjusted in order to control sanding trace length. Another unique feature is the automatic machanical lowering and raising of the whole sanding unit which prevents the well known issue of workpieces crashing with the slightly bulged (due to humidity) sanding belt.
The cross belt unit X is located either within the machine body somewhere between the other sanding units or at the machine entrance. Just like the H unit it is meant to supplement our oblique sanding technology in order to create high end surfaces. The X unit can also be used to sand cross veneered parts as well as for pre-sanding purposes like removing plastic or glue residue. The X unit features, just like the H unit, a chevron conveyor belt system, steplessly adjustable belt speeds as well as the automatic raising and lowering feature in order to prevent workpieces from crashing with bulged (from humidity) sanding belts.
This version of our cross sanding units allows the use of extra long sanding belts. The standard X and H units, which are already aimed at users with the highest demands, are even surpassed by these extended versions. Depending on the working width and unit type, up to 80% more belt length is available. This increase in sanding belt length means even better sanding results on cross-grain wood and lacquer. Especially when sanding varnish, the improved cooling of the sanding belt is advantageous. Furthermore, a much improved belt life can be expected, which is very relevant especially in industrial production.
Compared to the Xg unit, the Hg unit is distinguished by the fact that it has a separate second motor to drive the chevron belt. With the individual adjustment of the speeds of sanding belt and chevron belt, the sanding track length is influenced, which means another valuable level of control over the sanding result, especially in high-gloss lacquer sanding.
The Xd unit combines our revolutionary oblique sanding procedure with cross belt technology. Our engineers observed that a significant number of customers are using their cross belt unit in combination with a large grain sanding paper in order to achieve a rough sawn finish. The only weakness of this otherwise ingenious hack: The operator has to place the workpiece at a slight angle to correct for the conveyor speed and get a saw finish perfectly perpendicular to the workpiece. This is a risk because it is very difficult to know exactly at which angle to place the workpiece. And by rotating it on the conveyor belt you're loosing precious working width too. Therefor Kündig came up with the solution of putting the cross belt unit at an angle to provide a professional solution for a widespread application. This technology now finds use in door and window production.