Knuth CNC Vertical Machining Center X.mill 1680

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Knuth CNC Vertical Machining Center X.mill 1680

X.mill 1890 shown

Rigidity, maximum precision and cost-effective operation make this proven series even more powerful

  • GPlus 450 CNC control with touch screen technology, plus USB port
  • throat width up to 900 mm
  • optionally with gear step for extra-high torque
  • large X axis travel up to 1600 mm
  • extra wide cast-iron frame with heavy ribbing minimizes vibrations, resonance and torsion to ensure maximum accuracy and optimum surfaces of the part
  • extra-wide rectangular Y axis guideways ensure superior rigidity during heavy chip removal operations and allow machining of large and heavy parts
  • max. workpiece weights up to 2200 kg
  • all guideways are ground, hardened and protected by premium stainless steel covers
  • large, preloaded ball screws are driven directly by the servo motors
  • a powerful spindle motor provides 18.5 kW to ensure adequate power reserves
  • GPlus 450 CNC control – with touch screen technology, extensive storage space, plus USB port – practice-oriented and easy to operate
  • easy access and reachability of the machine table were the focus during the design of the machine frame and work space in order to reduce down-times to a minimum
  • includes chip conveyor
  • the chip tray is easily accessible and includes a powerful chip flushing system
  • a blow-out and coolant gun are within reach of the operator for quick and easy cleaning of the workspace and the workpieces
  • automatic central lubrication for low maintenance is standard
  • a spindle blow-out system protects the tool mount from chips and coolant

Specifications - X.mill 1680 - CNC Vertical Machining Center

working area  
travel X-axis 1600 mm
travel Y-axis 820 mm
travel Z-axis 700 mm
table dimensions 1700x820 mm
table load capacity 2200 kg
number of T-slots 7 Pieces
T-slots, width 18 mm
T-slots, spacing 120 mm
spindle nose-to-table surface distance 180 - 880 mm
spindle center-to-frame distance 900 mm
spindle speed 6000 rpm
spindle mount BT 50
rapid feed X-axis 15000 mm/min
rapid feed Y-axis 15000 mm/min
rapid feed Z-axis 15000 mm/min
work feed X-axis 1 - 7000 mm/min
work feed Y-axis 1 - 7000 mm/min
work feed Z-axis 1 - 7000 mm/min
tool head  
number of tool stations 24 Pieces
tool size Ø x L (max.) 110x300 mm
tool size Ø x L (max.) for tooling 180x300 mm
tool weight max. 15 kg
tool-change time tool/tool 2,5 s
positioning accuracies ± 0,008 mm / 0,0003"
repeatabilities ± 0,005 mm / 0,0002"
drive capacity  
motor rating main drive (cont./30 min) 15/18,5 kW / 20/25 Hp
motor rating for X-axis drive 4,4 kW
motor rating for Y-axis drive 4,4 kW
motor rating for Z-axis drive 5,5 kW
total power consumption 45 kVA
measures and weights  
overall dimensions 4300x3400x3100 mm
weight 14000 kg

Control - X.mill 1680 - CNC Vertical Machining Center

GPlus 450 Fräsen

GPlus 450 - Windows-based CNC control for milling machines

  • Easy, user-oriented operation allows quick creation of programs
  • 450 NC blocks/sec, 200 sets LookAhead
  • 40 GB hard drive to store NC programsbold;">
  • Intuitively programmable, customizable machining cycles with a large variety of help graphics in the Cycle Editor
  • 10/100 MBit Ethernet interface allows remote diagnostics from anywhere in the world; USB port
  • No knowledge of G & M Code Instructions necessary
  • Workshop-oriented programming at the control or external programming (CAD/CAM)
  • received the TechStar 2008 award for most innovative future-oriented products
  • The GPlus 450 features a 17“ TFT color monitor with touch-screen display to display all data for a user-friendly programming experience and easy operation
  • Status messages show the user the current state of the control
  • Frequently used machining sequences can be programmed quick and easy using the graphics-based Cycle Editor.
  • With the use of Input masks, the Cycle Editor guides the operator intuitively and self-explanatory through the editing steps. A separate Help Graphic is available for every definable parameter
  • Knowledge about the G and M Code Command Set or special programming language are NOT needed. However, experienced users have the ability to use DIN/ISO programming to create NC programs.
  • Graphic simulation with integrated zoom function for a detailed display of actual chip removal
  • A standard 10/100 MBit Ethernet interface and USB port allow fast data transfers from externally created programs (CAD/CAM) and saving these on the GPlus 450 hard drive
  • single CPU concept (advantage: ties up only 2% of the system capacity)
  • 40 GB storage, 2.0 GHz Intel Celeron processor, 256 MB RAM
  • block processing time: 450 NC blocks per sec
  • worldwide remote diagnostics
  • Profibus, CANopen, DeviceNet implementation is possible
  • machine can be integrated in factory networks
  • technology-specific cycles for milling and drilling

Cycle overview M (Milling):

  • Milling cycles: circular pocket, rectangular pocket, arc pocket, face milling
  • Drilling cycles: basic drilling, drilling with dwell time, deep-hole drilling, tapping, reaming
  • Drill patterns: row of holes, Hole circle / segment, free drill positioning, rectangle / parallelogram, grid

Why PC Technology?

  • PC Technology serves as platform for high-performance CNCs, since it allows us to automatically take part in the development programs of leading manufacturers of motherboards, hard drives, software, and operating systems. Thus, these manufacturers provide us with an "extended workbench". The rapid development of these components gives the KNUTH GPlus 450 a special edge.
  • Optionally, the GPlus 450 software may be installed on a regular office PC (System Requirements: Intel processor) whereby the user interface is fully identical with the machine control user interface. This allows for a very realistic operation and programming training of newcomers. The created NC programs can be tested and simulated and are fully executable on the machine's control.

Maximized PC power results in optimized speed, surface quality, and accuracy of the machine tool and ensures high dynamics and ease of use. This makes the GPlus 450 ideally suited for a large variety of machining technologies, e.g. milling (form construction). Programming of technology-specific machining cycles is quick and easy; therefore, this control can be used for both single part and small batch productions.

The portable hand control unit features an ergonomic design with two Acknowledge buttons (safety enable). The machine axes can only be moved, if one Acknowledge button is activated. Two rotary selector switches are provided for axis selection and feed speed setting. Additionally, the hand control unit is equipped with an emergency stop button, an electronic hand-wheel and machine-dependent function keys to simplify machine set-up.


Standard equipment - X.mill 1680 - CNC Vertical Machining Center

GPlus 450 control, 24-station tool changer with dual-arm, spiral chip conveyor, electronic hand-wheel, servo drive for all axes, spindle with gear step 6000 rpm / BT 50 , spindle oil cooler, pneumatic tool clamping, control cabinet with A/C, chip flushing system, coolant system, air and coolant water spray wand, automatic central lubrication, work space lighting, signal lamp, alignment elements, operating tools, operating manual and programming instructions

Accessories / Tools - X.mill 1680 - CNC Vertical Machining Center

chain-type chip conveyor
tool length measurement
coolant fed through spindle (70 bar)
X.div 320 for GPlus Control
X.div 400 for GPlus Control
HNCS 100V Hydraulic Machine Vise
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HNCS 160V Hydraulic Machine Vise
HNCS 200V Hydraulic Machine Vise
Shell End Milling Arbor BT50x40
Shell End Milling Arbor BT50x50
De Luxe Clamping Tool Set 18/M16


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