Common reasons for three-coordinate strikers

Details determine success or failure. Here we list the common reasons for three-coordinate strikers.

1: Burr flanging (especially the large flanging at the machined surface and the casting blank surface)

2: Lack of processing, unprocessed (such as broken taps) caused by temporary changes in process or version upgrades or broken tools.

3: The inspection tool is forgotten in the workpiece and not found in time (such as smaller screws, spacers, etc.).

4: Items such as the three-coordinate handle, v-block or vise on the workbench interfere with the measurement and are not found in time.

5: The workpiece clamping does not meet the requirements, such as:

①The shape of the workpiece needs to be measured from top to bottom. Generally, double-sided adhesive bottom surface or magnetic v-block is used for adsorption. If you use a vise to clamp the shape, it will hit the vise, and some workpieces will hit the vise if the vise is too high to the vise face;

②The V-shaped block selected for the pad workpiece is too large or the positional deviation of the workpiece relative to the tooling is too rough and the effective length of the program stylus is insufficient;

③ There is no position to avoid the point to be picked on the reverse side of the workpiece;

④ The workpiece is not leveled and straightened or the positioning is not in place.

6: Colliders caused by incorrect input values, for example:

① Omission of decimal point;

②I didn't pay attention to the sign of the value

③ The two adjacent keys on the keyboard are pressed at the same time or by mistake;

④ Simple numerical calculation error;

⑤ The small steps that are easy to be ignored are not noticed when the data is reversed.

7: There are additional stylus angles in the program. Generally, the reasons are as follows:

①Some machines have the default stylus angle of AOBO after each boot, and need to be manually switched to other angles to adjust. Such operations are sometimes saved in the program without attention;

②When opening the program to change the stylus, it is found that the angle of the probe is inconvenient. When changing the stylus, it is necessary to manually switch the angle. If the cursor position is not noticed at this time, an extra angle may be added;

③ When the program result is bad and needs to be confirmed, a reasonable position and rotation angle are not selected and saved.

8: Operations related to moving points and safety planes:

① omission of safety plane or moving point;

② Some safety planes should be deleted at the corners of the angle, but not removed;

③ Direct use after changing the safety plane will sometimes crash the plane. To avoid such problems, you can add a moving point before using it.

9: Reasons related to hand-picked points:

①When picking points manually, the fast and slow keys are not switched so that the speed is too fast to hit the machine. Sometimes it is forgotten and sometimes there is no response after pressing it. Generally, try not to be troublesome before picking points. Check and confirm that there is no problem before picking points. Move a little distance to the side to confirm the speed;

② When picking points by hand, the eyes are too far away from the picking point (especially when measuring large workpieces), so it is likely that the machine speed and the distance between the stylus and the workpiece will be inaccurately judged and the workpiece will hit the workpiece quickly;

③ The work plane was not noticed. Especially when the programming hand picks the coordinates for the initial construction, if the working plane is not switched to the straight line used to build the coordinate system, it is likely to cause the rotation direction to deviate greatly or be invalid, and almost all such programs cannot run or collide. Points usually need to be paid more attention, and the two-dimensional features collected by hand must correspond to a reasonable working plane to be effective;

④ When executing the program, the elements used to create the coordinates are wrong, such as height and direction. Generally, the first plane or point of the program is the highest plane, but the specific program shall prevail.

10: Sometimes the firing pin is directly related to changing the program, for example:

①In the programming process, it is found that the previous coordinate system is unreasonable and changes are made, especially if the origin is changed, it is most likely to cause a collision;

②In order to save the path and save time, the program is optimized, and sometimes some security planes are deleted, and the ones that should not be deleted will be removed if you are not careful;

③The program deleted from the program of the similar product will also have a similar situation:

④Change the stylus configuration in the program. For example, if the 1# machine uses the existing 2-5-40 stylus to execute the 2-10-20 (2) stylus programmed by the 2# machine, it may collide due to insufficient rotation radius.

11: It is not found that the stylus does not leave the workpiece and the related computer operation is performed to cause the stylus to rotate.

12: Not familiar enough with the company's existing three-coordinate hardware configuration. For example, the type of measuring head, type of sensor, shape, rotation radius and other special features of the three machines, some programs are only suitable for one machine to execute.

13: Sample point settings or move avoidance settings are ignored when measuring elements with automatic features.

14: Occasionally, the rotation angle of the stylus is inconsistent with the original program or does not rotate when executing the program. There are generally two cases of inconsistency in the angle: one is that the stylus does not have the same angle before the calibration and the option of "use probe tip" is directly selected; the other is that the workpiece clamping direction deviates from the original program, causing the machine to automatically match the relevant angle. Not rotating is generally because the stylus parameters are incorrect and the machine cannot recognize it, and it usually prompts "Illegal stylus command".

15: The rotation angle of the extended stylus at the extreme position on the left and right sides of the machine axis will also lead to collision.

16: The associated work plane or move point was ignored when executing a block or from the cursor.

17: The hardware configuration is incorrect when calibrating the stylus, generally the length of the extension rod or the length of the stylus is loaded incorrectly.

18: There is generally no problem with the direct execution of the stylus after calibration, but some programs will also crash. Such programs are usually in automatic mode after the stylus is calibrated. The common ones are as follows:

① The saved positioning program (the manual coordinate part of this program is generally marked);

② Load other measuring tips in the middle of the program. To avoid collisions, one or more non-interfering moving points can be added after loading the stylus during programming;

③ Programs opened by the old version of offline software. The manual mode at the beginning of this program is forcibly changed to automatic mode;

④The program provided by the customer, this kind of program is automatic mode from the beginning, and it needs to be modified before use.

19: The approach distance is too large or too small. If it is too small, it will hit the face of the element similar to the small groove;

20: The program in flight mode did not pay attention to the size of the flight radius and the connection of the program path, or someone changed the stylus with a larger radius later.

21: I don't know the parameter settings of the uncommon automatic features. For example, the difference between the inner cylinder and the outer cylinder at the starting circle coordinates.

22: When measuring the finished part, the stylus is lifted away from the workpiece at a very fast speed, and the machine will crash if you are not careful. For example, an axis is locked, or the coordinate system on the handle is switched to a coordinate system with a large deviation from the machine tool coordinate.

23: The indicator light of the stylus protection key is off and it is not found in time. This situation is generally caused by abnormal operations. For example, the machine does not click "Stop" first but directly clicks "Cancel" during the automatic execution process.