Unnecessary backtracking to the limit in turning function

[tektonandroid]

Hi everyone. I have a question about the automatic turning operation in H4. In each pass, the tool returns to its outer limit before moving the carriage. Wouldn't it be a considerable time saver if it only moved, i.e. 1mm before moving to the start? How could this behavior be changed?

[tektonandroid]

Thank you very much, Maxim. I didn't remember, although I was already in that thread...
Let's go with it

[duebelpapst]

Hello Maxim,

I don't think that's what he meant.
Rather that during longitudinal turning, the X slide does not move to the starting diameter after each pass before the Z slide moves to the starting position, but only moves back 1 mm from the diameter that has just been turned.

I have been wanting to ask the same question for some time.

[tektonandroid]

Exacto. Es tal y como indica @duebelpast. Disculpad la confusion....
Saludos.

[kachurovskiy]

You can change the position it moves back to when in turn/face/thread mode here: https://github.com/kachurovskiy/nanoels/blob/main/h4/h4.ino#L2804-L2811

You could try something like (untested):

    // Retracting the tool
    if (opSubIndex == 3) {
      long targetPos = auxPos + auxSafeDistance;
      stepToFinal(aux, targetPos);
      if (aux->pos == targetPos) {
        opSubIndex = 4;
      }
    }

[duebelpapst]

Hello,

I will test it with H5 during the week, but I think I have to exclude the thread mode, otherwise the thread will be cut when driving on Z0.
I'll get back to you.

// Retracting the tool
if (opSubIndex == 3) {
 if (mode != MODE_THREAD) {
   long targetPos = auxPos + auxSafeDistance;
   stepToFinal(aux, targetPos);
   if (aux->pos == targetPos) {
     opSubIndex = 4;
   }
 } else {
  long auxPos = auxStartStop + auxSafeDistance;
  stepToFinal(aux, auxPos);
  if (aux->pos == auxPos) {
    opSubIndex = 4;
  }
 }
}

[duebelpapst]

Hi,
The code is OK.
In MODE_TURN, X is only retracted by the safedistance.
For MODE_FACE, Z is retracted by the same amount.
When MODE_THREAD, X is always retracted to the initial diameter plus the safedistance.
For H4 and H5, it is best to search for "Retracting the tool" and replace this section.