Basic requirements for the feed drive of CNC machine tools

CNC machine tools can be divided into two major blocks: the CNC system and the machine tool. The CNC system mainly completes the control of the position of the table, the start and stop of the spindle, the commutation, the shift, the selection of the tool, the replacement, the hydraulic system, the cooling system, and the lubrication system according to the input program. In order to complete the processing of parts, the machine tool must perform two major movements: main movement and feed movement. In addition to being controlled by the CNC, the main movements and feed movements of CNC machine tools should be characterized by fast response, high precision, and high stability in the mechanical structure.

This lecture focuses on the mechanical structure characteristics of the feed system.

1, high transmission stiffness

The high transmission stiffness of the feed drive system mainly depends on the stiffness of the screw nut pair (linear motion) or the worm gear (rotary motion) and its supporting parts. Insufficient stiffness together with frictional resistance can cause the table to crawl and cause reverse dead zones, affecting transmission accuracy. Shortening the transmission chain, selecting the screw size, and pre-tightening the screw nut pair and supporting components are effective ways to improve the transmission stiffness.

2. High resonance

In order to improve the anti-vibration performance of the feed system, the mechanical components should have a high natural frequency and appropriate damping. Generally, the natural frequency of the mechanical transmission system should be 2 to 3 times higher than the natural frequency of the servo drive system.

3. Low friction

The feed transmission system requires smooth movement, accurate positioning and good quick response characteristics. It is necessary to reduce the frictional resistance of the moving parts and the difference between the dynamic and static friction coefficients. Ball screw nut pairs are commonly used in feed transmission systems.

4. Low inertia

Because the feed system often needs to start, stop, shift or reverse, if the inertia of the mechanical transmission is large, it will increase the load and degrade the dynamic performance of the system. Therefore, under the premise of meeting the strength and rigidity, the weight of the moving parts and the size of each transmission element should be reduced as much as possible so as to improve the ability of the transmission parts to respond quickly to commands.

5. No gap

Mechanical clearance is another major cause of the reverse dead zone of the feed system. Therefore, all links of the drive chain, including gear pairs, screw nut pairs, couplings and their supporting components, etc., should be eliminated. Structural measures.

STONE WORKING Cnc Router


This cnc router is designed for stone working, could cut, engrave and drill on marble, granite, travertine, limestone, onyx, soapstone, slate, quartzite etc, suitable for fireplace, countertop, sink, desk in kitchen, bathroom, residential, hotel, office building etc.


Advantages of Stone Cnc Router:

  • Three axises adopt imported linear orbit, two line sliding track, heavy loading, stable working, high precision, longlife time.
  • Whole seamless weld steel structure, wheels on cnc router table, not easy to distort, the table back lining is armor plate, good rigidity, the machine can bear 1 MT at least.
  • Constant power spindle and motor, strong cutting capacity, high efficiency,Well compatibility, compatible software CAD/CAM, such as Type3,  Artcam, Castmate, Wentai, CorelDraw.


Product Application:


1. Suitable for natural marble, granite, bluestone, sandstone, artificial stone, tombstone, milestone, ceramic tile, jade, crystal, ceramics, glass, plastic, wood, bamboo, cambered surface, sphere, stainless steel, iron, copper, aluminum, titanium alloy, can doing 3D embossment, and line engraving, beveling, drilling 2D engraving.
2. Such as granite stone can be layered engraving to 3mm.
3. Marble, bluestone can be engraving to 3mm on time.

4. Engraving characters, letters, pattern, intaglio, rilievi, handwriting, ancient calligraphy, abraziune colored drawing, flat carving colored drawing, etc. on stone, glass, depth can control optionally, to reach the artistic effect.


Main Features:


★ Heavy duty Machine structure, good weight bearing capacity, not easy to deformation, the special machine bed design, can bearing more than 2000kgs materials.
★ The special designed Zaxis, can increase the stone relief accuracy, can solve the Zaxis belt or ball screw breaking problem thoroughly.
★ The water proof and dust proof system for X Y Zaxis, can protect all the parts, reduce the machine fault, enlarge the life time.
★ High-performance driven motor to ensure that the machines high speed and accuracy.
★ Using well-known domestic brands of water-cooled brushless spindle, low noise, strong cutting ability, to ensure the long time working.
★ Easy to use Mach 3 controller works with all industry standard CAD/CAM software(optional, Nc-studio, DSP controller)
★ High grade Hiwin square rail
★ XY axis German helical rack and pinion
★ Z axis high precision TBI ball screw
★ 900*1500mm, 1300*1800mm, 1300*2500mm, 1500*3000mm,1800*2500mm standard sizes (Special sizes available upon request.)

★ 1 spindle, 2 spindles or 3 spindles available upon request.


stone engraving machine

Technical parameters:


Items

Parameters

Working area(mm)

1300*2500*200mm/1200*1200mm, etc.

Table Structure

T-slot table

Transmission system

X,Y axis Gear Rack transmission,z axis Ballscrew from Taiwan but with German technology

Lead rail system

Linear round guide rail

Spindle power

5.5 kw Water-cooling ,3.175/4/6/12.7mm

spindle speed

0-24000 rpm 

Motor

stepper(Panasonic/Yaskawa optional)

Drive

stepper(Panasonic/Yaskawa/hybrid optional)

Dust collector system

For your option

Inverter

7.5kw Fuling inverter

Software environmant

Windows 98/2000/XP

Control System

DSP A11/Mach3/Nc-studio controller

Compatible file formats

G code; *.u00 ; *.mmg ; *.plt .

Compatible CAD/CAM Softwares

Ucancam V8 / Type3 / Artcam /

Working Voltage

AC380V,3ph, 50Hz

Precision

0.005mm

Max speed

26.0m/min

Max engraving speed

18.0m/min

Max feeding height

200mm

Work-holding devices

by fixture

Interface type

USB

Warranty guarantee

One-year after-sale services


stone cnc router for engraving marble


stone cnc router for granite marble

Professional Stone Cnc Router

Professional Stone Cnc Router,Stone Cnc Router,Stone Engraving Machine,Stone Engraving Equipment

Shandong U-May CNC Technology Co., Ltd. , https://www.sesamecnc.com