Widebelt sanders

The Premium model series of wide belt sanders uses customary, well-proven parallel sanding technology and delivers great results from solid timber sanding up to lacquer sanding applications, provided the requirements don’t include high gloss.

Durable and reliable

The construction of the Premium series of wide belt sanders has been refined for decades and provides great sanding performance even after many years in service or under harsh conditions. The moving upper section of the machine allows for a fixed working height. The machine can bear processing workpieces of up to 1000 kg (2000 lb) without any modifications. Versions with inlet height of up to 500 mm (20 inch) are available.

Easy handling

All operations and adjustments are easily attainable, depending on preference, Kündig machines can be operated fully automatically, with custom automated sanding programs, or manually, by adjusting all relevant parameters on the go. The user interface is very intuitive and motivates each user to explore advanced options and features and thereforee using these precision sanders to their full potential without hesitation. Built-in safety measures eliminate the risk of major accidental operating errors. Kündig sanders are well known and appreciated for their easy handling.

The Brilliant series of wide belt sanders are often found in joineries, interior fitting companies and the like. They offer the same features as the Premium series but contain at least one unit with Kündig's patented oblique sanding technology. Simply put, Kündig’s exclusive oblique sanding technology does what experienced woodworkers do instinctively: Through pivoting of the sanding unit, the sanding grit’s cutting ability and belt life improves and undesirable sanding traces, which are so typical for almost all wide belt sanders, don’t show on the workpiece.

Oblique is better

When sanding conventionally with oscillation, belt errors (grit outbreaks, belt wear marks) are running parallel to the conveyor direction along the workpiece. This leaves the operator with a very common problem: Oscillation traces. With the oblique sanding technology, these inevitable belt errors run slightly diagonally to the conveyor direction, thus the undesirable effect is evenly spread on the workpiece surface and has no visible impact on it anymore. This makes for much more homogeneous surfaces. In addition, raised wood fibers are being cut off much more efficiently thanks to the shearing cut effect.

The advantages of oblique sanding

• Absolutely homogeneous surfaces
• No oscillation traces
• No raised fibers
• Significant reduction of scratches on cross grain workpieces
• Reduction of sanding belt consumption of up to 35%
• Less lacquer consumption due to less raised fibers
• Greatly improved surface quality
• Easy handling

Better surfaces, demonstrably

According to actual users, the oblique sanding technology is especially good for lacquer sanding. But it’s also great to use on cross-grain surfaces.

In real life use, the improved cutting ability allows for smaller grit sanding belts. When sanding with an oblique unit, sanding traces on the workpiece cancel each other with every rotation of the belt and become pretty much invisible to the human eye.

These are scientifically sound facts: When Dr.-Ing. Ingrid Fuchs from the Wood Technology Institute in Dresden did Tests on surface roughness, she found: “The fact that roughness values are smaller when using the oblique sanding technology as opposed to the classic parallel sanding technology is clearly visible.”

Oblique sanding units

Kündig Brilliant sanders have at least one oblique sanding unit. With traditional, parallel sanding units, even after short use, sanding belts show small damages, grit outbreaks and irregularities due to wear and clogging. These imperfections negatively affect the sanding image, particularly on delicate surfaces like lacquer or veneer. This inherent flaw of the parallel sanding process can be avoided by pivoting the sanding unit by 10°. Further advantages are the absence of oscillation marks, extended life of the sanding belt due to this error-tolerant procedure and significantly better sanding quality. For lacquer and veneer applications this technology is ground-breaking, but its great advantages are also very visible in window production or fine solid timber work.

Sanding pads

Pneumatic pad

Well proven sanding pad technology, especially for solid timber processing. A continuous air cell provides even pressure on the workpiece.

Segmented pad

The segmented pad is divided in segments either 35 or 22 mm wide. These segments are computer controlled and preferences can easily and thoroughly be adjusted by the operator. The electronically controlled, segmented pad is especially useful for taking care of those delicate workpiece edges on lacquered or veneered parts.

Pad options

Segments and thereforee the sensing rollers at the machine entry are available in 35 or 22mm width. Depending on the material that needs to be sanded, a variety of sanding shoe hardnesses are available. Two different hardness shoes are included from the factory.

Segmented Pad Controls

A segmented sanding pad is an integral component of any lacquer wide belt sander. Kündig uses not only 22mm (1 Inch) thin workpiece detecting rollers but the same small 22mm size sanding segments as well. The software allows for easy and logical control of this complex precision instrument. In the upper part of the screen, the overall sanding pressure is adjusted. Below, the pressure on the workpiece edges can be regulated in percentage increments. Additional segments can even be added or subtracted on each side. Asymmetric adjustments, which means different edge pressure on each side, are possible as well. In order to specifically concentrate on either the front or rear end of the workpiece, the activation and retraction of the sanding segments can either be delayed or accelerated, which is easily controlled in the bottom window.

Behind this software is a refined control system that converts those user inputs with millisecond precision. This allows for accurate segment activation even at extremely high feed speeds (for example in furniture industry applications). This technology is available in Kündig's parallel, oblique and cross belt units.

Unit options

Calibration Roller

Steel or rubberized, in different diameters and with different belt lengths: 1900, 2000, 2620, 3250 mm.

Cross Belt Unit

Depending on application either at machine entry, in between the other units or at the exit.

Brushes

Either as add-on or as an integrated unit with a variety of brush roller types for sanding, structuring, cleaning from dust. With or without oscillation. A carousel unit for sanding of three dimensional workpiece surfaces or the rounding of edges.

Planer Unit

For planing or calibrating, usually before finishing the workpiece by sanding it. Different versions available for working widths: 650, 1100, 1350, 1600 mm.

With their new Perfect model range, Kündig is two steps ahead of the constantly changing interior design industry. Behind the modern design lies a multitude of innovations in sanding technology, which in combination exceed even the highest demands in terms of surface quality. The control unit, which has been developed from scratch, makes sanding even easier and more intuitive. All models are suitable for integration into any relevant control system and are thereforee fully capable of industry 4.0. Of course, the Perfect is completely modular and can be equipped with a large selection of sanding units and options.

Features

• High-speed technology for extremely fast feed speeds
• Very large selection of options and customization possibilities
• The most advanced control unit for sanding machines
• Possibility of belt/work piece cleaning without the use of compressed air
• Automatic pressure control for segmented pad
• Electronic grain adjustment and stock removal distribution between contact rollers
• Pattern/vintage sanding (with cross belt)
• and many more

Easy Operation

For decades designing sanding machines as operator friendly as possible has been a core concern of Kündig so that they can be used comfortably by almost anyone, regardless of experience.

Manual operation: The machines can be operated fully manually using just 3 convenient control elements.

Comfort operation: Thanks to the Enormatic function, Kündig sanders can be easily, reliably and very comfortably operated. Workpiece thickness measuring and starting of the sanding process is automatically executed.

Touch operation: All settings, for example the choice of sanding units, feed and sanding belt speed, etc. can be selected on the simply designed touchscreen and saved as programmes for future use.

Control System Features

• 10 to 19 inch screens available
• Operating unit can be pivoted from 0° to 90°
• 1-click quick start
• Logical, clear, time-saving
• Remote access via network or cloud
• Recording of production data, for example: m²/ft² measurement, workpiece counter and job times
• USB port for data backup
• USB port for devices (see below)
• Automatic error diagnosis with guided trouble-shooting / error correction
• Integrated PDF documentation
• (wiring diagram, instructions, sanding advice)

Interfaces

• Connection of all Perfect machines to all relevant control systems, in particular the Industry 4.0 standard OPC UA
• A wide range of USB input devices: Mouse, keyboard, bar code, RFID, camera, etc.
• USB memory stick for backup and technical documentation
• Connection of different sensors (humidity, temperature, etc.)
• Wifi or network access to the machine’s controls as well as production data
• Fulfilment of specialised requirements thanks to the modularity of the control system

Remote Access

• With different devices (smart phone, tablet, pc, etc.)
• Remote controlling of the machine
• Trouble shooting / diagnosis
• Support
• Data logging through cloud
• Software updates & backups
• High security thanks to VPN

When it comes to sanding, the Kündig Master gets to the point. It contains the essence of Kündig's 75 years of experience in sanding technology. This means that it combines, “out of the box”, all the properties that are essential for the fast, reliable production of perfect surfaces. No more, no less. This core model has a generous working width of 1350 mm and is equipped with a calibration roller as well as a fine sanding pad unit and features a proven, robust construction that guarantees decades of high sanding precision. The quick and easy controls make for a great user experience.

The Features, To the point

Construction: The Master is in no way inferior to the other model series in terms of robustness and durability. It has the same solid construction, which makes every Kündig machine an investment with foresight that still reliably deliver precise sanding results even after many years of use.

Head Movement / Constant Pass Line: For three decades, Kündig has equipped its machines exclusively with moving top sections. Why? Compared to classic table adjustment, it is more complex in design, but also better in many respects. The machine can be loaded with higher workpiece weights, it maintains its precision more reliably and you have the advantages of a constant working height.

Workpiece dimensions: The adjustment of the upper part, i.e. the passage opening, is motorized, finely adjustable via touch screen. The maximum passage height is at least 160mm. With a working width of 1350 mm, the Kündig Master has a generous and well-proven standard dimension.

Eco energy saving mode: The Kündig Master is equipped with a specially developed Eco energy saving mode. This software regulates the power consumption depending on load. As soon as work breaks occur, the machine automatically switches to standby mode. It is then immediately ready for use again. This results in significant savings, without compromising performance.

The sanding units, a proven combination

The sanding units are based on the proven combination of a calibration roller and a sanding pad unit. The two versions in which the Kündig Master is available are distinguished by the fine sanding pad unit (see below). For a safe workpiece guidance there is a parallel spring-loaded steel pressure roller at the machine infeed and rubber pressure rollers between the sanding units.

Calibration unit (R): The calibration roller is a grooved rubber contact roller of proven hardness. It is ideally suited for calibration tasks, if necessary also with high stock removal rates. The level of the contact roller is adjustable to compensate for the thickness of the inserted abrasive grit.

Segmented sanding pad (E): With the E-Plus package, the fine sanding unit has a segmented, electronically controlled sanding pad with workpiece detecting rollers 35 mm wide. This allows an even more precise fine sanding in the edge area of the workpieces. The edge pressure of the sanding segments is automatically controlled, but can also be adjusted on the touch-screen in order to influence the sanding around the edges of the workpiece even more precisely. Here too, the graphite cloth insert can be changed quickly and easily.

Pneumatic sanding pad (P): As part of the Comfort package, the Master is equipped with a pneumatic sanding pad. The pressure of the inflatable sanding pad can be precisely adjusted by means of a regulator. Graphite cloth inserts can be replaced quickly and easily.

Operation, quick and easy

All parameters required for sanding are directly accessible on the clearly arranged touch screen. This includes, for example, the feed speed (3-15 m/min), the stock removal, the passage height / target thickness of the sanding result, as well as the segmented pad controls (E-Plus package). Alternatively, the Master can also be easily operated via rotary switch, analogue stick and buttons. The settings for perfect sanding are thus made in seconds. The workpiece thickness can be measured over the entire working width. Separate programs can be stored for repetitive sanding operations. Safety features such as the overthickness safety feature prevent gross operating errors and, thanks to the intelligent error diagnosis, the user is informed what brought the machine to a halt, if one happened to occur.

Kündig builds machines for every sanding application and material: sanding to tolerances of hundredths of a millimeter, structuring with great reproducibility, sanding abrasive materials, or contouring with CNC sanding technology.

Technic Botop: bottom and top widebelt sanders

Industrial sanding is output oriented: fast feed rates and high surface quality, sometimes on both sides of the part in one pass. Kündig top and bottom sanders deliver both.

Technic Brush: brushing and texturing

Dedicated brushing machines and add-on brush units for precise structuring, with adjustment to compensate for brush wear in serial production.

Technic Cross: crossbelt sanding

Sanders with at least one cross belt unit, mainly used for lacquer and high-gloss work or sanding cross-veneered surfaces.

Technic Vmax: double-oblique sanding for windows

Two symmetrically arranged oblique units in a V eliminate sanding traces on delicate surfaces and on window sashes with long and cross-grain sections.

Technic CNC: 3D contouring

Numerically controlled sanding units for highly repeatable contour sanding, used heavily in the ski and snowboard industry.

Technic Precision and Industry

Precision sanders that calibrate to hundredths of a millimeter, and line-integrated industrial sanders built for three- and four-shift operation.