Haas Nextgen post not rotating just Caxis (UMC1000/Fusion360)

[Anonymous]

Bit of an odd post issue. The part currently in the machine just needs to rotate along z, using the c axis on the machine. This is just to avoid resetting the part in the machine, as I've run out of Y axis travel.

I've sketched a line to set x along to move the part enough,and I'm using a simple adaptive rough and then contour toolpath with tool orientation set. When posting there is no C axis rotation, nor is there an error (neither machine side or software side) letting me know this rotation isn't happening - which could very easily scrap the part!

I don't think I need to post/share the project or post, as I do believe this will happen regardless doing these moves using the current Haas nextgen post from the library.

[boopathi.sivakumar]

Hi @Anonymous 

By default the post processor will adjust the coordinates in x,y if there is any orentation along Z axis,

the post needs to be bit modified to handle the orentation along z, to modify the post change as mentioned below

find for the function getWorkPlaneMachineABC

instead of var abc = machineConfguration.getABC(W); change the logic as mentioned below

function getWorkPlaneMachineABC(workPlane, _setWorkPlane) {
  var W = workPlane; // map to global frame
// add the logic from here
  if (currentSection.isZOriented()) {
    var abc = new Vector(0, 0, -Math.atan2(currentSection.workPlane.right.y, currentSection.workPlane.right.x));
  } else {
    var abc = machineConfiguration.getABC(W);
  }
// to here 
  if (closestABC && !currentSection.isZOriented()) {    //<< change the logic like this
    if (currentMachineABC) {
      abc = remapToABC(abc, currentMachineABC);
    } else {

save the post and test it carefully, do the air pass test it before you go for real cutting 

and let me know the feedback

[Anonymous]

Below is the code I used. Seems to translate C backwards, as the posted program turn clockwise when I've got it set to be skewed CCW.

I'm not sure I edited correct, JS surly isn't my day job!

function getWorkPlaneMachineABC(workPlane, _setWorkPlane) {
  var W = workPlane; // map to global frame
  if (currentSection.isZOriented()) {
    var abc = new Vector(0, 0, -Math.atan2(currentSection.workPlane.right.y, currentSection.workPlane.right.x));
  } else {
    var abc = machineConfiguration.getABC(W);
  }

  //var abc = machineConfiguration.getABC(W);
  if (closestABC && !currentSection.isZOriented()) {
    if (currentMachineABC) {
      abc = remapToABC(abc, currentMachineABC);
    } else {
      abc = machineConfiguration.getPreferredABC(abc);
    }
  } else {
    abc = machineConfiguration.getPreferredABC(abc);
  }
  
  try {
    abc = machineConfiguration.remapABC(abc);
    if (_setWorkPlane) {
      currentMachineABC = abc;
    }

[boopathi.sivakumar · Accepted solution]

@Anonymous 

you did the correct modification could you try removing the - sign before the Math

 var abc = new Vector(0, 0, -Math.atan2(currentSection.workPlane.right.y....

 it should look something like this 

var abc = new Vector(0, 0, Math.atan2(currentSection.workPlane.right.y, currentSection.workPlane.right.x));

carefully test the codes in machine and let me know the feedback

[Anonymous]

Worked perfect! back to making chips!

Thanks!

[ray.taylorDN6MT]

Hi Boopathi,

I'm facing the same issue with the Syntec/Fanuc controller, can you please advise how to make the same change? Post section as folllow:

 } else {

      if (useMultiAxisFeatures) {

       abc = getWorkPlaneMachineABC(_section.workPlane, false, true);

        var newWorkPlane = machineConfiguration.getOrientation(abc);

        euler = newWorkPlane.getEuler2(EULER_ZXZ_R);

        abc = new Vector(euler.x, euler.y, euler.z);

      } else {

        abc = getWorkPlaneMachineABC(_section.workPlane, _setWorkPlane, true);

      }

      if (_setWorkPlane) {

        setWorkPlane(abc);

      }

    }

I understand the theory of ignoring the rotate around Z tool orientation, however given the user had to intentionally setup the tool orientation it seems a little odd to ignore this as a default? As with the creater of this thread, we are also intentionally rotating about C to gain access to areas of the part which are outside of the maching window.

Ray