CNC Center Fault Handling

- Sep 07, 2017-

Numerical control center is developed from CNC milling machine. The biggest difference is that a machining center and CNC milling machine has the ability of automatic exchange tool, through the libraries installed on the different USES of the knives, can be in a clamping on the automatic tool change device to change the spindle tool, implement a variety of processing capabilities.

The nc center is an efficient automatic machine which is composed of mechanical equipment and nc system for machining complex parts. Nc machining center is one of the most widely used CNC machine tools in the world. Its comprehensive processing ability is stronger, a clamping workpiece can be completed after more machining, the machining accuracy high, moderate difficulty of batch workpieces, its efficiency is 5 ~ 10 times of general equipment, in particular, it can accomplish many ordinary equipment can't finish machining, the shape is complex, high precision single processing or small batch more varieties of production is more suitable. It concentrates the functions of milling, boring, drilling, tapping and cutting thread on a single device, which has many technological means. The machining center is classified according to the space position of the main shaft: horizontal and vertical machining center. According to the technological use classification: boring milling machining center, compound machining center. According to the special classification of functions: single table, double table and multi-workbench processing center. Single shaft, double-axis, three-axis and the machining center of the main axle box.

The determination of the processing route

CNC lathe feed processing route tool from the knife point movement began fixed origin (or machine), until the return to that point and end the route processing program, including cutting paths and cutting tool cut, cut out of the empty travel path.

The feed route of the precision machining is basically carried out along the contour sequence of its parts, so the key to determining the route is to determine the route of rough machining and empty stroke.

In nc lathe processing, the determination of processing route generally follows the following principles.

The accuracy and surface roughness of the workpiece shall be guaranteed.

The shortest route is to reduce the time of air travel and improve machining efficiency.

Try to simplify the work of numerical calculation and simplify the processing procedure.

A subroutine should be used for certain repetitive programs.

Troubleshooting: fault 1: CNC center serial encoder communication error alarm, cause: unit detected the CNC machining center's motor encoder broken line or poor communication. Check the connection between the feedback line and the amplifier of the motor. If the feedback line is normal, replace the servo motor (because the motor coder is one with the motor and cannot be opened), if the alpha motor changes the encoder. If it occurs occasionally, it may be caused by interference and check whether the shielded wire of the motor feedback line is in good condition.

Fault 2: CNC machining center encoder pulse counting error reporting (6, LED display system of PMM showed 305/308 alarm / 303/304) cause analysis: in the operation of the servo motor serial encoder in pulse missing, or does not count. Turn off the machine, and if there is a similar alarm, replace the motor (if it is the alpha motor to replace the encoder) or feedback the cable. If the nc machining center is switched on and the alarm disappears, the reference point must be returned to run the other instructions. If the PMM of the system is 308 alarm, it may be caused by interference, and then turn off again.

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