An X53K vertical milling machine of our company was outsourced and transformed into a popular CNC milling machine in 2003. The numerical control system used is unstable and the fault is frequent, which is easy to cause the workpiece to be scrapped. The system manufacturer's replacement of the board also failed to cure the failure, and the model system was no longer produced, and it was decided to make modifications on its own. The original system uses Japan's Panasonic MINAS-A AC servo drive and motor, the performance is stable, to be retained, the CNC system is replaced by Beijing Kanedi K100Mi and its additional operation panel, I / O adapter board selected Beijing Machine Tool Electric Co., Ltd. products. Due to the small load, the DC24V power supply on the machine side and the DC24V power supply on the CNC side use the same set of switching power supplies. The original control cabinet and suspension cabinet can be reserved for use.
The debugging process is as follows:
(1) Connect the line according to the self-made pattern, check that the power supply resistance is normal (no short circuit), try to power on, and the boot page is displayed normally. Enter the diagnosis screen to check the machine input signal, manually touch each limit switch, and find that the zero return deceleration proximity switch signal level is opposite, so use the relay to transfer. The driver ready and alarm signal levels are also reversed. Modify parameter 009.
(2) Manually move each axis, the screen number changes, the machine does not move, and the drive does not seem to respond. Check the relevant parameters, the trial change is invalid; check the driver parameters, and no mistakes, but use the driver monitoring function to check its input signal and find that there is no enable (CNC ready) signal. Check the CNC signal diagram. Because the driver's connection command cable is not standardized in the manual, a 0V short wire is soldered between the 8 and 14 pins of the plug. After the welding is completed, the axis moves normally (the parameter 008 is modified when the direction is wrong).
(3) Check that the limit switch of each axis is displayed correctly on the diagnosis screen. The manual switch of the limit switch does not work during the axis movement. Modify the MOT bit of the PLC parameter 200 to 0, cancel the check of the hard limit, and then start the test of each axis. To be sure.
(4) Modify the MESP bit of PLC parameter 200 to 0, cancel the emergency stop switch shielding, and short the emergency stop switch end of the DI port, only the emergency stop on the additional panel is effective.
(5) Try to open the X-axis reference point, the starting speed is very fast, the driver alarms, change the fast parameters 038~040 and the low-speed parameter 200 when the zero point is re-tested, and find that the moving direction is wrong, and the Y and Z axes are normal (Yes Compared with the old system). Trying to change the parameter 007 is invalid, it is only changing the compensation direction of the back gap. In the PLC parameter 199, the axis movement direction key that is not used when returning to the reference point is masked, and the test is started normally.
(6) The backlash of each axis is measured by the meter, and the display number is different from the actual displacement, which is 5 times larger. Try to change the multiplication factor of each axis (parameters 15 to 17), and the difference is larger. Then change the division ratio of each axis (parameters 18 to 20), so that the actual displacement is the same as the screen display number, but all the speeds are slowed down, and the movement speed parameters of each axis are modified again. The backlash of each axis is measured, and parameters 53-54 are filled in, and then the zero is touched when the repeating positioning accuracy is repeated, indicating that the compensation is correct.
(7) Because the precision of the machine tool is not high, no pitch error compensation is performed, and the positioning accuracy of several positions is measured only with a 100 mm block gauge.
(8) The main shaft is still mechanically shifted, and the shifting impulse is realized by external wiring, interlocking with the system control spindle line. Modify the PLC parameters 214 to 217 to stop the spindle and the braking time meets the requirements for use.
(9) Check the CNC parameters and PLC parameters item by item, and make adjustments according to the use requirements. The program is run empty, and the test is processed without errors.
The machine tool has been rebuilt since May 5, 2010, and it is normal and trouble-free.
Vanity Lights,Glass Vanity Light,Indoor Solar Lights,Stair Lights Indoor
Foshan Nanhai Pinming Electrical Appliance Co.,Ltd , https://www.mavcadonf.com