CNC Machine Tools Return troubleshooting

CNC Machine Tools Return troubleshooting

Manual reference point return operation of the machine coordinate system is built on thepremise, most of the first CNC machine is turned on manually operated actions are generally the reference point.Cnc machining  If the reference point back to the failure processing program will not be able to return the position of the reference point will not affect the accuracy of machining accuracy, or even crash.

      Analysis and excluded the issue back to the reference point of failure is necessary.

 1. Back to the main types of reference point of failure   

   A CNC machine operator training center has 20 CNC machine tools, and is purchased in batches, the system more types of students training in the operation, there have been back several times reference point of failure, through the timely analysis was excluded.     

 According to experience,Cnc machining   different systems in different models of CNC machine tools, there back to the reference point of failure, mainly in the following five categories: super-way there and the police; back less than a reference point, the reference point indicator does not light; back to the reference point instability; back to the whole pitch offset reference point; back to the reference point the alarm, and alarm information.

   2. Back to the reference point troubleshooting   

   The process occurs over and the police, divided into two cases. One case is the reference point before the position of the axes from the reference point resulting from too small. Lift overtravel protection, and will move to the travel axis within the scope of the reference point to re-operation, to troubleshooting; other is the "reference point deceleration" block loose or change position due to failure to re-adjust the fixed block to be troubleshooting.

  Back to the reference point due to the amount of the reference point indicator is off. Diagnostic capabilities through the machine in the diagnosis of the page under the corresponding "Location tracking error" (dgn800 ~ 802) to check if the positioning accuracy of the tracking error exceeds the permissible range, you can adjust the servo drive, "offset" potentiometer so that the " Position tracking error "(dgn800802) value close to" 0 ", you can troubleshoot.    

   There reference point for the unstable failure, first check the location and block exposure, and then check the pulse encoder "zero pulse" if there are problems, the last check the gap between the motor and lead screw. If the unstable displacement error is small, usually among the last case, the gap should be eliminated to remove a loose connection.    

   Reference point the whole pitch shift. When the workpiece is always stable  displacement error occurred, and exactly equal to the screw pitch, then the problem lies in the back reference point. Reference points are generally located in the "reference point slow down" after the opening of the first block of a "zero pulse" on. If the block release, the encoder happens in the "zero pulse" in the vicinity, there will be a whole pitch shift. Need to re-adjust the deceleration stop position, preferably slow release position and the block encoder "zero pulse" position, a difference of half a pitch.       

  Back to the reference point for the alarm, and fault alarm. For alarm information, view the machine instructions for the appropriate treatment. Message alert may belong to: encoder "zero pulse" and the system grating bad bad bad shield, the system parameter setting error and other failures. Cnc machining  For the hardware bad need of repair or replacement; for parameter setting error, you need to reset the parameters by backups.

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