1. The origin of the coordinate system of workpiece set by the programmer during programming shall be outside the workpiece blank, at least on the surface of the workpiece.
In normal circumstances, the origin of workpiece coordinate system can be shot anywhere in Dongguan CNC processing plant, as long as the origin has a certain relationship with the origin of machine tool coordinate system. But in practice, if the command is zero or near zero, the tool will directly refer to the position of zero or near zero. During milling, the tool will run to the base surface of the table or fixture; Dongguan CNC processing plant in turning, will run to the chuck base. In this way, the tool will penetrate the workpiece and point directly to the reference plane. At this time, if it is to move quickly, an accident will occur. FANUC system general setting: when decimal point is omitted, it is the minimum input unit, usually HM. When the decimal point is omitted, the value entered will be reduced to one thousandth, and the value entered will be close to zero. Or, for other reasons, the tool should have left the workpiece but did not actually leave the workpiece and entered the workpiece. In this case, the zero point of the workpiece coordinate system shall be set outside the workpiece or on the base surface of the workbench (or clamp), and the result will be different.
2. Programmers and operators should be careful of decimal points when writing programs.
FANUC system is the minimum setting unit when decimal point is omitted, while most domestic systems and some European and American systems, when decimal point is omitted, it is mm, that is, the input mode of calculator. If you are used to the way the calculator is entered, there will be a problem with the FANUC system. Many programmers and operators may use both systems to prevent problems due to decimal points. In order to make decimal point conspicuous, isolated decimal point is often written as "0" form in programming. Of course, when the system executes, zero after the decimal point of the value is ignored.
3. When adjusting the workpiece coordinate system, the operator shall set the reference point beyond the physical (geometric) length of the tool, at least on the tool point of the longest tool.
For the workpiece coordinate system on the installation drawing of the workpiece in Dongguan CNC processing factory, the operator can get the coordinate system offset of the machine tool by setting the machine tool coordinate system. That is, the operator sets a reference point on the machine tool, and finds the dimension between the reference point and the zero point of the workpiece coordinate system set by the programmer, and sets the dimension as the workpiece coordinate system offset.
Dongguan CNC processing factory can set the reference point on the lathe at the center of tool frame rotation, the point of reference tool or other positions. If no additional movement is attached, the zero command of the programmer is the reference point of the tool holder (machine tool) to the programmed Ling position. At this time, if the reference point is set at the center of the tool frame rotation, the tool holder must collide with the workpiece. To ensure that no collision is achieved, the reference point on the machine tool shall be not only set outside the tool holder, but also outside all the tools. This way, even if the tool is installed on the tool holder, the reference point will not collide with the workpiece.
Dongguan CNC processing plant is on the milling machine, and the reference point of X and Y axis is on the axis of the main shaft. However, the reference point of the z-axis can be set at the spindle end or on a point outside the spindle end. If at the spindle end, when the command is zero, the spindle end will reach the zero position specified in the coordinate system. At this time, the end key of the spindle end will collide with the workpiece: if the spindle is equipped with a tool, it must collide with the workpiece. To ensure that no collision is made, the reference point on the Z axis shall be located outside the length of all tools. Even if no other movement is attached, the reference point will not collide with the workpiece.
4. When adjusting the tool length offset, the operator shall ensure that the offset value is negative.
When the programmer commands tool length compensation, the T code is used for turning, while G43 instruction is used for milling, that is, the tool length offset value is added to the instruction value. In the direction of coordinate axis of machine tool, it is specified that the moving direction of the tool away from the workpiece is positive, and the direction of the tool moving near the workpiece is negative. The operator adjusts the tool deviation value to a negative value, which is to command the tool to move to the workpiece. When the tool is directed to approach the workpiece in the program, besides the command value, the offset value of the tool is added, which is moved to the workpiece. At this point, if this value is omitted, the tool will not reach the target point.
In order to make the tool offset value negative, the reference point on the machine tool must be set outside the length of all tools, at least at the tool position (tip) point of the reference tool.
Regular maintenance contents of machining center machinery
1. Check the smooth system and pressure gauge condition, clean the filter screen of smooth system, replace the smooth oil and dredge the oil path,
2. Check the air circuit system, clean the air filter screen, and eliminate the leakage of pressure gas.
3. Check the fluid system, clean the filter, clean the tank, replace or filter the fluid. Replace the seal if possible.
4. Fasten all drive parts and replace the bad standard parts.
5. Grease smooth parts, fill with smooth grease as required
6. Clean and clean all transmission surfaces,
7. Check the condition of the tool magazine and manipulator, analyze the wear condition of the manipulator, and propose the replacement proposal to the customer.
8. Correcting and correcting the damaged parts of external components.
9. Check the condition of the guard. Accurately feedback information to customers.