HELP w/FANUC Post
The retract move is handled in the onSection function and will retract whenever the post determines that there is a tool change, or a change in the WCS or Work Plane. The following code handles the retract.
if (insertToolCall || newWorkOffset || newWorkPlane || forceSmoothing) {
// stop spindle before retract during tool change
if (insertToolCall && !isFirstSection()) {
onCommand(COMMAND_STOP_SPINDLE);
}
// retract to safe plane
writeRetract(Z); // retract
forceXYZ();
If you don't want the tool to fully retract when the WCS changes, you can make the following changes to the code. In this example it will still retract when there is a tool change or the Work Plane changes (3+2 operations).
if (insertToolCall || newWorkOffset || newWorkPlane || forceSmoothing) {
// stop spindle before retract during tool change
if (insertToolCall && !isFirstSection()) {
onCommand(COMMAND_STOP_SPINDLE);
}
if (insertToolCall || newWorkPlane) { // insert this line
// retract to safe plane
writeRetract(Z); // retract
forceXYZ();
} // insert this line
Bob Schultz
Sr. Post Processor Developer
The setup of the Fanuc post requires that tool length compensation be canceled prior to initiating smoothing and the post also requires that the tool be retracted prior to canceling the tool length compensation (this is a safety feature, since the tool can plunge into the part if the tool has not been retracted first).
Not all Fanuc controls require that tool length compensation be canceled prior to initiating the smoothing mode, either due to the control model or type of smoothing being used. If your control/smoothing mode does not require that tool length compensation be canceled first, then you can modify the following code in the post to remove this requirement.
function onSection() {
...
if (insertToolCall || newWorkPlane) {
// retract to safe plane
writeRetract(Z); // retract
forceXYZ();
}
if ((insertToolCall && !isFirstSection()) || forceSmoothing) {
if (insertToolCall && !isFirstSection()) { // add this line
disableLengthCompensation();
} // add this line
setSmoothing(false);
}
...
...
function setSmoothing(mode) {
if (mode == currentSmoothing) {
return false;
}
// 1) Make sure G49 is called before the execution of G05.1 Q1 Rx
// 2) G05.1 Q1 Rx must be engaged BEFORE G43-Tool Length Comp
// 3) AICC and AIAPC need to be turned on and off for each tool
// 4) AICC and AIAPC does not apply to canned drilling cycles
// validate(!lengthCompensationActive, "Length compensation is active while trying to update smoothing."); // comment out this line
It is not recommended that you disable the retract move if you are using tool length compensation for tool changes for the reason mentioned above, just in case you completely removed the retract move in your version of the post.
Bob Schultz
Sr. Post Processor Developer
Hello @DerekZCXVY,
Your situation is a bit different, since you commented out or removed all calls to writeRetract, which means that the tool will never be fully retracted; not at tool changes, not when the rotary axes position changes, not at the end of the program.
First I will ask if you are sure that this is what you are expecting and is it safe on the machine?
Bob Schultz
Sr. Post Processor Developer
I would suggest that add the call to writeRetract back at the start of onSection at the very least.
if ((insertToolCall && !isFirstSection()) || forceSmoothing) {
writeRetract(Z); // <<< ADD THIS LINE
disableLengthCompensation();
setSmoothing(false);
}And also in the onClose function.
If you determine that that the tool does not have to be fully retracted to safely disable length compensation (G49), then you can remove the check to verify that it is retracted in the disableLengthCompensation function.
/** Disables length compensation if currently active or if forced. */
function disableLengthCompensation(force) {
if (lengthCompensationActive || force) {
// validate(retracted, "Cannot cancel length compensation if the machine is not fully retracted."); // <<< COMMENT OUT THIS LINE
writeBlock(gFormat.format(49));
lengthCompensationActive = false;
}
}
Bob Schultz
Sr. Post Processor Developer