Operation and setting of basic parameters of fanu0

2022-08-02
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Fanu0 CNC system basic parameter operation and setting

Abstract: CNC system parameters are a series of data used by the CNC system to match machine tools and CNC functions. After the CNC system is connected, the system parameters must be determined first. After summarizing and sorting out the parameter description, this paper introduces the function and significance of the main parameters of the CNC system and the basic operation methods and steps of setting, Thus, the reader can finish the parameter uncertainty of the system independently in the process of NC maintenance or debugging

in fanuc-oib CNC system, parameters can be divided into system parameters and PLC parameters. The meaning of system parameters is classified according to certain functions. There are more than 40 categories. PLC parameters are the data used in the PLC program of CNC machine tools, such as the data of timers, counters and holding relays. These two types of parameters are the prerequisite for the normal startup of CNC machine tools. This paper takes the setting and adjustment of common parameters of the system as an example to explain the setting of some main parameters

1 parameter picture the basic operation of China's plastic extruder industry is moving towards a sustainable direction

(1) call of system parameters

press the "system" key on the system keyboard, and the system will enter the corresponding picture. Press the corresponding soft menu key "parameter" at the bottom of the screen, and then enter the system parameter setting picture. Press the page turning key or cursor key to find the parameters expected by Liu J, Or directly input the parameter number for retrieval operation. In the future, the test objects of impact testing machine will be expanded from materials and parts to complete machine, complete vehicle, system, major facilities and various engineering projects

(2) setting of system parameters

when the system is in MDL mode or emergency stop, press the "sffset/set" key on the system keyboard, then press "setting", set 0 to L in the "parameter write" item that appears, and turn on the write protection of parameters. Press the "system" key on the system keyboard, find the parameter number expected by Liu J in the "parameter" soft key through the parameter call and retrieval method, input the corresponding setting value, press "input" to input data, and shut down and restart the system according to the system prompt and close the write protection to complete the operation

2. Common parameter setting and adjustment of the system

(1) parameter setting of relevant axes

① basic parameter setting of each axis

1001.0: minimum moving unit of linear axis

0: metric system 1: English system

1 002.1: no stop reference point setting

0: invalid 1: valid

1004.1: set the minimum input unit and the minimum moving unit

0:is-b l:is-c

1 005.0: when the reference point is not established, move the system state except G28

0: alarm 1: no alarm

1005.1: whether the reference point setting without stop is effective

0: invalid 1: valid

1 006.0: set as linear axis or rotation axis

0: linear axis L: rotating axis

1 006.5: the direction of each axis back to the reference point

0: positive 1: negative

1008.0: set whether the rotation axis cycle function is effective

0: invalid 1: valid

1008.2: whether the relative coordinate value is displayed according to each transfer momentum cycle

0: do not press 1: press

② to set the total number of axes of the CNC system:

8130 to set the number of CNC control axes: 1010 in the CNC system, the lathe has 2 axes, and the milling machine adopts mechanical locking 3 as the previous fixture 1. If the total number of axes of the system is 4, they are x, y, Z and C axes respectively, of which X, y and Z axes are controlled by CNC and PLC, and C axis is controlled by PLC, three aspects need to be paid special attention: n0.81 n0.101

③ axis name setting parameter: l020

in the setting of this parameter, it is set according to the corresponding table of control axis name and setting value, for example, the X axis is 88, the Y axis is 89, and the Z axis is 90

④ programming unit setting: 00 00

0 000.2: program input unit 0: metric system 1: English system

0 000.5: whether to automatically add line number during programming

0: not to automatically add line number 1: automatically add line number

0 001.0: minimum moving unit of linear axis

0: metric system 1: English system

1006.3: T-series X-axis coordinate diameter/radius mode setting

0: radius value L: diameter value

⑤ stroke limit of each axis

In order to prevent accidents caused by mechanical or electrical faults, the moving parts are usually limited by hard limit and soft limit. The hard limit is to set a stop at the motion limit of the part. The set distance from the movement limit stroke of the big Ding part is less than the working stroke of the screw rod. The overtravel touches the stop so that the system is in an emergency stop state to protect the machine tool

the soft limit is to set the moving range of the moving parts in the parameters. The soft limit parameters are:

1320: the positive direction boundary coordinate value of each axis storage city travel detection 1

1321: the negative direction boundary coordinate value of each axis storage city travel detection 1

⑥ compensation for the reverse clearance error: 1851

in the machine tool feed transmission chain, due to the reverse clearance of each transmission pair, As a result, the motor idles and the workbench does not move during the reverse movement of the machine tool, resulting in machining errors. Therefore, it is particularly important to measure the reverse error of linear movement for compensation. The specific steps are as follows:

first clear all values under the "axis compensation parameter", select the minimum pulse equivalent under the handwheel mode to control the movement of the workbench and touch the dial indicator, clear the dial indicator and the display at the same time, and move the workbench in the reverse direction, When the dial indicator pointer moves, the display reading recorded is the reverse clearance compensation value. In order to improve the accuracy, the average value can be measured repeatedly

fanuc system reverse clearance compensation parameters:

1851 shaft reverse clearance compensation amount

⑦ pitch error compensation: 3620, 3621, 3623  3624

after measuring the error distribution curve with a detection device (such as a laser interferometer) at least one order of magnitude higher than the measured ball screw

input the pitch error compensation position number of each axis reference point in parameter 3620

input the minimum position number of each axis pitch error compensation in parameter 3621

input the maximum position number of each axis pitch error compensation in parameter 3622

input the screw pitch error compensation magnification of each axis in parameter 3623

input the position gap of each axis pitch error compensation in parameter 3624:

2. Servo parameter setting

1 815.1:optx, position detector

0: do not use the separated pulse encoder

1: use the separated pulse encoder

1 815.4:apzx. When using the absolute position encoder, the mechanical position and the position of the absolute position detector

0: inconsistent L: consistent

1 815.5:apcx, Position detector

0: do not use absolute position detector

1: use absolute position detector

1 825: servo ring gain of each axis. All values shall be set to the same value during linear and circular interpolation

1 826: in place width of each axis. In place width of each axis is the difference between the machine position and the command position. When the actual position is less than the in place width, the machine is considered in place

1828: the maximum allowable position deviation value in the movement of each axis

1 829: maximum allowable position deviation value when each axis stops

1850: grid offset of each axis/reference point offset

3. Machine tool coordinate system parameter setting

mechanical coordinate system setting parameters: l240, 1241, 1242, 1243

1240: the coordinate value of the first reference point of each axis on the mechanical coordinate system. After the parameter is set, the primary power supply shall be cut off

1241: coordinate value of the second reference point of each axis on the mechanical coordinate system

1242: coordinate value of the third reference point of each axis on the mechanical coordinate system

1 243: coordinate value of the fourth reference point of each axis on the mechanical coordinate system

workpiece coordinate system setting parameters: L220, 1221 ~ 1226

1 220: external workpiece origin offset

122 1 ~ 1226: offset of workpiece origin of workpiece coordinate system 1-6 (G54-G59)

1 425: FL speed of each axis returning to the reference point. This parameter is set to the running speed of each axis after the speed reduction of each axis

1428: the speed at which each axis returns to the reference point. If the parameter of each axis is set to 0, the fast running speed of each axis will run at the speed of G00 set in l420

1420: fast running speed of each axis. This parameter sets the G00 speed of each axis when the fast running speed multiplying factor is 100%

142 1: fast operation magnification F0 speed of each axis

1422: the maximum cutting feed speed of each axis is valid when polar coordinate interpolation and cylindrical interpolation are performed

1 430: the maximum cutting feed speed of each axis is valid when executing linear interpolation and arc interpolation commands

1423: when the feed rate is set to 100%, the feed rate of jog

1424: manual fast running speed of each axis

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