Precision GMMV-3021 Gantry Type CNC Machining Center

1,Spindle
The main shaft motor is driven to the main shaft end through a coupling. The motor reduces thermal deformation of the spindle through constant-temperature cooling, thereby improving spindle precision and the machine tool's machining accuracy. The spindle group adopts Taiwan BBT50 high-rigidity spindle, ring-sprayed design, with high precision and high performance. The main shaft grabs the tool by the butterfly spring on the main shaft acting on the pull stud of the tool handle through the four-petal claw broach mechanism with the tension force. The machine tool has the functions of spindle orientation and rigid tapping.
The main shaft can be optionally equipped with a BF gearbox to achieve high and low-speed changes through automatic shifting, and step-less speed regulation within each speed.

2,Feed Transmission Of Each Axis
The X, Y, and Z transmissions all use AC servo motors as power sources, and ball screws as transmission components. The ball screw is fixedly supported at both ends, supported by imported special precision bearings, and pre-stretched in two directions to ensure the feed rigidity and life of the screw. The Y-axis screw is equipped with an advanced auxiliary support structure, which can effectively avoid the accuracy error caused by the sag of the center of gravity of the large-stroke screw. The Z-axis motor has an automatic brake function. In the event of a power failure, the automatic brake will hold the motor shaft tightly so that it cannot rotate.

3. Guide Rail Form
The X-axis guide rail pair adopts two heavy-duty linear guide rails with low friction coefficient and high sensitivity; small vibration at high speed and no creep at low speed. The drive shaft has high positioning accuracy and excellent servo drive performance; at the same time, it has a large load-bearing capacity and good cutting anti-vibration performance, which can improve the dynamic characteristics of the machine tool and increase the accuracy, stability, and service life of the machine tool;
The Y-axis crossbeam guide rail pair uses two heavy-duty linear guide rails arranged in a stepped configuration, providing a large span and sufficient bending and torsional rigidity.
The Z-axis guide rail pair adopts four heavy-duty linear guide rails and 10 sliders to ensure smooth cutting during processing.