Guangzhou CNC 25i series CNC system alarm "PC0008 encoder multi-turn data abnormal" alarm, driver GH series 8 # alarm, usually because the drive battery voltage is low, the zero point will be lost, then what should the user do after replacing the battery, especially How to adjust after the zero point of Z axis is lost? How to adjust the stroke after resetting the zero point? Below we will explain this troubleshooting method by case analysis.

After the GSK25iM-H system is powered on, the PV0008 alarm appears. After opening the cabinet, it is found that the GH2000 driver has an alarm No. 8. System alarm.








02 Troubleshooting
Step 1: Do not power off again after the system is powered on, press the system key to enter the parameter interface, and then press the (Diagnostics) soft key below the screen to enter the system diagnostic interface and search for No. 42 as shown in Figure 2-1 Diagnose the No. 42 X and Z axis diagnostic data (this data is the machine coordinate before the last power off).




Step 2: The drive is replaced with a new 3.6v battery when the CNC system is powered on.



Step 3: Press the offset OFT key to enter the [Login] setting interface, enter the password for installation and commissioning: XXXXXX (consult the after-sales technical support staff for specific details), enter the correct password, then the corresponding level password will be displayed in red words and the related The parameters are shown in Figure 2-3 below.




Step 4: Press the system key to enter the system parameter interface, search for parameter 4001 to enter the interface shown in Figure 2-4 below. In MDI mode, move the cursor to the position parameter corresponding to 4001.3X axis and Z axis respectively, press the number key [0] to set the parameter to 0, press the emergency stop button; then reset the X axis and Z axis After setting the parameter to 1, press the numeric key [1] to set the parameter to 1, release the emergency stop, and press the reset key. At this time, the alarm details of the system information interface have been eliminated.




Enter the machine tool position coordinate interface, you can see that the mechanical coordinates of the axis and the Z spindle are both "0". At this time, the current machine tool position is the new X, Z axis mechanical zero point, as shown in Figure 2-5 below.




Step 5: Press the system key to enter the system parameter interface, search for parameter No. 1080 to enter as shown in Figure 2-6. The parameters No. 1080 and No. 1081 are the setting values of the software limit before the reference points of the three axes of the machine tool X, Y and Z are not lost.




The current machine coordinate position of the X-axis and Z-axis in the fourth step becomes the reference point X0 / Z0 (mechanical zero point), and the X and Z-axis diagnostic data X213.9461 / Z-157.5060 (this data is The machine coordinates before the last power outage are inconsistent. The goal is to move the X / Z two axes to the machine coordinate position X-213.9461 / Z157.5060 through the handwheel to retrieve the original machine zero before the reference point is lost ), The software limit alarm will appear in the current moving X, Z axis system, so first change the software limit parameters No. 1080 and No. 1081, that is, change the large stroke to allow the machine tool X, Z axis to move to X-213. Z157.5060 position. Switch to MDI mode and change the software limit parameters No. 1080 and No. 1081 to Z500 / X1000 as shown in Figure 2-7.




Step 6: Switch to the handwheel mode and move the X and Z axes to the No. 42 X and Z axis diagnostic data X213.9461 / Z-157.5060 recorded in the first step. The opposite value of the value is X-213.9461 / Z157.5060 is the machine tool The original X-axis and Z-axis mechanical zero positions are shown in Figure 2-8 below.




Step 7: After the X and Z axes move to X-213.9461 / Z157.5060, repeat the fourth step operation to reset the current position to the machine zero, and the machine coordinates of the X and Z axes in the position interface will become X0, Z0, at this time the machine tool has recovered to the zero position before the fault.

Step 8: Press the system key to enter the system parameter interface, search for parameters 1080 and 1081 and enter the original parameter data of 1080 and 1081 recorded in the sixth step to restore the X and Z axis software limit parameters of the machine tool , As shown in Figure 2-9.




03Through the above steps, you can quickly solve the problem of low battery voltage and loss of reference point, especially the clever use of the system No. 42 diagnostic data value (the commanded position of the last motor bed off) does not need to set the Z-axis second reference point Library tool change point).