218MC pitch error compensation adopts a more concise way, only need to determine the error compensation value of the forward movement end position of the interval of each compensation interval and their corresponding compensation numbers to compensate. The following describes the debugging process of pitch compensation in detail:

 

 

 

 

 

 

02 Input steps of pitch compensation value

Press the system key to enter the system page. There are five sub-interfaces: [+ offset], [+ parameter], [+ macro variable], [screw compensation], and [+ servo]. Press the [screw compensation] soft key to enter the pitch error The compensation page, as shown below:

 

 

 

Directly input the compensation value of each point of each axis, the steps are as follows:

Choose the entry method:

Press the setting key, and then press the [Password] soft key to enter the [Setting (Password)] page, and enter the password of the system debugging level or higher.

Press the [Set] soft key to enter the [Set] page and turn on the parameter switch.

Press the system key and then press the [Screw Compensation] soft key to enter the pitch error compensation display interface;

Use the up, down, left, and right direction keys to position the cursor at the target position, key in the compensation value, and press the enter key. The compensation value is entered and displayed.

 

 

 

 

 

 

 

 

03 Precautions for pitch error compensation setting

The set compensation amount is related to the positional relationship between the zero point and the compensation point, the mechanical movement direction and the compensation interval.

The compensation amount of the compensation number N (N=0, 1, 2, 3, ... 255) is determined by the mechanical error in the interval N~N1. The number of settable compensation numbers for each axis is 256.

The mechanical zero point is used as the compensation origin, and the compensation amount set for each axis is set as the parameter value.

Compensable axes: X, Y, Z, 4th axis.

Compensation range: compensation value (-999 pulse equivalent to +999 pulse equivalent) * minimum compensation unit. (Metric: 0.001mm Inch: 0.0001inch Angle: 0.001deg)

The unit of pitch error compensation of the rotary axis is deg.

When the pitch error compensation pitch is set to zero, the system does not compensate.

(Pitch error compensation is to perform pitch error compensation near the midpoint of the compensation interval)

After setting the relevant parameters of the pitch error compensation, it needs to be powered off and restarted, and it will take effect after the mechanical zero return.

After the pitch compensation is performed, the mechanical zero point of the machine tool cannot be changed arbitrarily, because after the mechanical zero position is changed, the position of the pitch compensation point will not match the actual compensation position of the machine tool, thus resulting in a decrease in machine tool accuracy. If the mechanical zero point needs to be reset for special reasons, it is necessary to recheck the data of the pitch error compensation.

By setting the pitch error compensation data, the pitch error compensation can be performed on each axis, so as to achieve the purpose of improving the accuracy of the machine tool, and the compensation worth unit is the detection unit. Different machine tools have different pitch errors, so the compensation data is also different. The pitch compensation data should be set according to the machine tool characteristics after the machine tool is connected to the CNC system. After the pitch error compensation data is set, in principle, the end user cannot change these data, because changing these data will reduce the accuracy of the machine tool.

 

 

 

 

 

04 Conclusion

Through the above description, you can quickly understand the five ways the location page is displayed, effectively providing an intuitive and concise display interface. The 218MC system has a pitch compensation number of 0-255. 218MC omits the concept of compensation points. Set the number of compensation points = lead screw stroke / compensation distance". The user only needs to determine one of the compensation points or the compensation distance according to the need, and the other parameter can be surely come out through the screw stroke, thereby ensuring the stability of processing and debugging.