Haas TRT-160 Ability to force A-90 instead of A90 with C180
Hi @dynamic.machine ,
You need to change Rotary direction(While needed) through the Post Properties.
Thanks,
Krupal Vala
Senior Technology Consultant - Post Processor & Machine Simulation
Another way around it, that I thought of a while ago and having seen this post I've just integrated it into mine. Not sure if I have done it correctly though (but seems to work on first test).
I've created properties for A and B min and max. So that they can b changed on a per program basis. Saves the need to go and mess with the hardcoded post. It's still a bit crude as you're just limiting the the table movements to get the desired result. Screenshot below. I can post how I edited it if interested.
@dynamic.machine wrote:
Is there any way to force fusion to post an A-90? The TRT-160 will tilt A+/- 120 degrees. I am in a situation where I need to force the trunnion to tilt A-90 instead of remaining at A90 and rotating C180 to get to the other side of the part. I have tried flipping the x-axis under tool orientation for the toolpath and it makes no difference at all. The machine has DWO/TCPC and the "Use TCPC Programming" post property is set to Yes. I have run into this issue before, but was able to work around it. This time, I have limitations that require A-90. In this particular situation, all I need is to be able to tilt the part A90 and A-90. No C axis moves are needed. Would somehow disabling the C Axis in the post get me what I need?
It is interesting to see the creative ways that have been used to control the direction of the rotary axes in the post. For this request I am going to give a more direct and simplified example of controlling the direction of the axes for a single 3+2 operation in the program. The latest version of the Haas Next Generation post has logic to select the closest solution for the rotary axes based on the direction preference defined when creating the axis, so make sure that you are working with the latest version of the post (it should have the getPreferenceWeight function defined in it).
You will need to create a Manual NC command that determines the direction of the A-axis. You do this by adding the following code to the onManualNC function, which defines the Action Manual NC commands "A+" and "A-".
} else if (String(value).toUpperCase() == "VFD_HIGH") {
coolantPressure = "P2";
} else if (String(value).toUpperCase() == "A+") { // <<< ADD FROM THIS LINE
rotaryDirection[0] = 1;
forceWorkPlane();
} else if (String(value).toUpperCase() == "A-") {
rotaryDirection[0] = -1;
writeln("direction = " + rotaryDirection[0]);
forceWorkPlane(); // <<< TO THIS LINE
}
break;Next, at the getPreferenceWeight function make the following changes.
var closestABC = true; // choose closest machine angles
var currentMachineABC = new Vector(0, 0, 0);
var rotaryDirection = [0, 0, 0]; // <<< ADD THIS LINE
function getPreferenceWeight(_abc) {
var axis = new Array(machineConfiguration.getAxisU(), machineConfiguration.getAxisV(), machineConfiguration.getAxisW());
var abc = new Array(_abc.x, _abc.y, _abc.z);
var preference = 0;
for (var i = 0; i < 3; ++i) {
if (axis[i].isEnabled()) {
var axisPreference = rotaryDirection[i] == 0 ? axis[i].getPreference() : rotaryDirection[i]; // <<< ADD THIS LINE
preference += ((abcFormat.getResultingValue(abc[axis[i].getCoordinate()]) * axisPreference) < 0) ? -1 : 1; // <<< CHANGE TO 'axisPreference'
}
}
return preference;
}And finally if you want the A+ and A- commands to only affect the next operation and not become the default setting, then add the following line at the end of the onSectionEnd function.
// reset for next section
operationNeedsSafeStart = false;
coolantPressure = properties.coolantPressure;
cycleReverse = false;
rotaryDirection = [0, 0, 0]; <<< ADD THIS LINE
}Now you can control the direction of the A-axis on an operation to operation basis for 3+2 operations.
Bob Schultz
Sr. Post Processor Developer
Sorry, I did leave some debug code in my example. You should remove the following line in the onManualNC function.
writeln("direction = " + rotaryDirection[0]); // REMOVE THIS LINEIn your post there are a couple of other changes necessary to get the desired results. In the onOpen function you need to increase the limits of the A-axis so that it can move to -90 degrees. You can also change the default direction of the A-axis so that it still selects the positive direction by default.
if (hasA) { // A Axis - For horizontal machines and trunnions
var dir = properties.hasAAxis == "reversed" ? -1 : 1;
if (hasC || hasB) {
var aMin = (dir == 1) ? -120 - 0.0001 : -120 - 0.0001; // <<< CHANGE TO -120 (or the actual limit on your machine)
var aMax = (dir == 1) ? 120 + 0.0001 : 120 + 0.0001; // <<< CHANGE TO -120 (or the actual limit on your machine)
aAxis = createAxis({coordinate:0, table:true, axis:[dir, 0, 0], range:[aMin, aMax], preference:-dir, reset:(hasB ? 0 : 1)}); // <<< CHANGE TO 'preference:-1'
} else {
aAxis = createAxis({coordinate:0, table:true, axis:[dir, 0, 0], cyclic:true});
}
}
Bob Schultz
Sr. Post Processor Developer
Hello @Anonymous,
The determination of the direction of the C-axis is based on the preferred direction of the A-axis. For example, A90 C180 has the same part orientation as A-90 C0 on the machine. As discussed in this thread, the preference of the A-axis can be changed when it is created and by a Manual NC command if you want to change the preference for a specific operation only.
Have you tried modifying your post with any of the suggestions in this thread? If not, the best place to start is when the A-axis is created. Changing the sign of the preference variable will cause the post to choose the other solution. For example, the following code in defineMachine ...
aAxis = createAxis({coordinate:0, table:true, axis:[dir, 0, 0], range:[aMin, aMax], preference:dir, reset:(hasB ? 0 : 1), tcp:useTCPC});
... can be changed to use -dir for the preference. This should select the opposite solution A-90 C0 instead of the current solution A90 C180 (these angles are listed as an example, since you did not state the A-axis position in your post).
aAxis = createAxis({coordinate:0, table:true, axis:[dir, 0, 0], range:[aMin, aMax], preference:-dir, reset:(hasB ? 0 : 1), tcp:useTCPC});
Bob Schultz
Sr. Post Processor Developer
Hi Jordon,
The Haas posts have been simplified to use new post engine capabilities and the instructions in this thread do not apply to the latest version of the posts.
It is now much easier to control via a Manual NC command. To make the changes to your post, you should first remove the following code from the post (getPreferenceWeight and remapToABC functions and associated variables).
// <<< Remove all lines from this line
var closestABC = true; // choose closest machine angles
...
// <<< To this line (but leave the forceModals function definition line)
function forceModals() {
Next, add the following two variables above the getWorkPlaneMachineABC function.
// <<< Add these 2 lines
var rotaryPreference = PREFER_PREFERENCE;
var controllingAxis = ABC;
Now change the following line in the getWorkPlaneMachineABC function.
// <<< Existing line
var abc = machineConfiguration.getABCByPreference(W, currentABC, ABC, PREFER_PREFERENCE, ENABLE_ALL);
// <<< New line
var abc = machineConfiguration.getABCByPreference(W, currentABC, controllingAxis, rotaryPreference, ENABLE_ALL);
Next, make the following changes in the onManualNC function.
// <<< Remove the rotaryDirection assignments and replace with the shown code
} else if (String(value).toUpperCase() == "A+") {
controllingAxis = A; // <<< Add this line
rotaryPreference = PREFER_POSITIVE; // <<< Add this line
forceWorkPlane();
} else if (String(value).toUpperCase() == "A-") {
controllingAxis = A; // <<< Add this line
rotaryPreference = PREFER_NEGATIVE; // <<< Add this line
forceWorkPlane();
And finally, reset the preference to the default value in onSectionEnd.
// rotaryDirection = [0, 0, 0]; // <<< Remove this line
controllingAxis = ABC; // <<< Add this line
rotaryPreference = PREFER_PREFERENCE; // <<< Add this line
It is possible to control the A-axis direction based on the tool orientation by checking the Y-axis orientation of the work plane and basing the A-axis direction on whether the Y-axis component is positive or negative. You will need to check the X-axis orientation if the Y-axis component is at 0.
For example, the following two work planes represent the same orientation of the rotary axes, but one flips the Y-axis direction in Fusion.
currentSection.workPlane=[[1, 0, 0], [0, 0.866025, -0.5], [0, 0.5, 0.866025]]
currentSection.workPlane=[[-1, 0, 0], [0, -0.866025, -0.5], [0, -0.5, 0.866025]] // Y-axis is flipped
Bob Schultz
Sr. Post Processor Developer
