The Utilization and Benefits Of The Monitoring Function Of The Cutting Tools Loading

Load monitor function is used for detecting overload on axis and spindle servo motors. If there is an overload; the machine stops immediatelly or stops at the next M30 command.
To use this function; we have to teach tool life and tool breakage overload value to machine. And the sset value of tool break must be bigger than set value of the tool life.
The machining stops at next M30 command and never starts again (without pressing reset key); if the overload value exceeds the set value of the tool life.
If the tool broken while machining and the value of overload exceeds the set value of tool break ; machine goes to feed hold position.
But you can not use the this function; while executing finish cut small diameter drilling and tapping.
To use this function; you have to machine the workpiece by using a new tool and with actual cutting feedrate. At this time tool overload value is teached to machine at TECH mode. And at MONI mode, while machining the workpiece, if the overload value exceeds the TCH mode, it stops the machining. One of the advantages of this functionis that if tool break happens, ne machine never be forced so much; therefore, it saves the usage life of bearing, slide, ball screws etc. And also if the tool life finished ; the machine stops at next M30 code and it prevents theworse surface roughness and accuracy.

Usage Of Load Monıtor On Lathe

Pres 2 times CUSTOM key then the load monitor setting screen appears , enter the desired tool number at Tcode section and select the axis which you want to measure overload. The spindle has been already selected and you can choose X or Z axis. You can see the max. overload value at INITIAL side; if you measured and teach it at TECH mode. And the control unit compares the value of CURRENT which measure the load while machining ; with the LIFE and stops machining if the current value exceeds LIFE value. You can enter the tool life value which is bigger than the INITIAL , to LIFE section. You should enter a bigger value than LIFE to BREAK section which defines the overload value of tool breakage.
When you push TECH key; CAN and ACT appears on the screen. When you execute the program and if you push the ACT key; the machine can get the max. overload value which is while machining; to INITIAL section automatically. After first cutting ; when you start to machining the next workpieces you have to push MONI buton which is next to TECH to get overload value. If there is any alarm because of overload you have push the reset key and change the tooling.

PROGRAM
O1111;
M11;
M196;
G00T0202;
G97 M03 S2000;
X50.0 Z70.0;
G01 Z10.0 F1.3;
G00 U1.0 Z80.0;
M197;
X300.0 Z 200.0;
M30;
With M196 command the machine starts the control overload for tool number 2 and it stops with M197 command. For each tool you have to use M196 to start checking of overload and M197 to stop checking of overload.