Ytec3D Forum

gogatam wrote: ↑Sun Jun 25, 2023 2:07 pm

Wonko wrote: ↑Wed Jun 21, 2023 12:19 pm Pin 24 of the printhead "READY" is an output from the printhead to the Arduino if you choose to connect it. If READY is high, you can check nFIRE. It is switched high a soon as two of the three firing cycles got triggered. I have no idea what "nReady" signal you are referring to.

Yes, MISO, MOSI and SCK must be assigned connections between the Arduino and the printhead. MOSI is the actual data from the Arduino to the head. SCK is the clock signal that tell the printhead when to read from the MOSI line. MISO is only used if you control more than one printhead through a single serial connection. Either nSS1 or nSS2 must be set to low when transmitting pixel data to teh head.

My code and PCBs are here: https://github.com/MatthiasWM/Xaar128 . No power supply PCB though.

Hi, Wonko!
We are trying to get our head to work, but there are problems with printing. We took Gkyle's code as a basis (https://github.com/gkyle/xaar128 ), we hear a sound coming from the head and everything seems to be working. The problem lies in the presentation of the material. We use a photopolymer that we feed through the tube, but it flows out without running the code. When you run the code, the material does not come out in the volume in which it should come out. Can you please tell me how to control the flow of material so that there is not too much of it and, at the same time, enough for printing?

Wonko wrote: ↑Mon Jul 24, 2023 11:06 am Pin 9 is marked as TEST 0, and the discs say "not required for operation, should not be connected".For pin 28 however, marked CLK, you must provide a 1 MHz clock signal to the print head. No PWM, just a 50:50 clock.

#include "Arduino.h"
//#include "carriage.h"
#include "xaar128.h"

int PENDING = 200;
int CYCLES = 1;

Xaar128 xaar128;
 
void setup (void) {
  Serial.begin(115200);

  //Carriage carriage;
  xaar128.init();

  // Set up a 1mHZ square wave for Xaar state machine CLK.
  // http://forum.arduino.cc/index.php?topic=103370.0
  TCCR1A = _BV(COM1A0);              // toggle OC1A on compare match
  OCR1A = 7;                         // top value for counter
  // UNO //TCCR1B = _BV(WGM12) | _BV(CS10);   // CTC mode, prescaler clock/1
  TCCR1B = _BV(WGM12) | _BV(CS10);   // CTC mode, prescaler clock/1

  Serial.print("Begin: ");
  Serial.println(PENDING);

  float steps = 0.0;
  float fails = 0.0;

  //carriage.init(LOW);
  xaar128.powerUp();
  delay(1000);

  for (int c=0; c<CYCLES; c++) {
    for (int p=0; p < PENDING; p++) {
      xaar128.loadData(p);
      delayMicroseconds(1);
      if (!xaar128.fire()) fails++;
      //carriage.step();
      steps++;
    }
    /*
    carriage.changeDir();
    for (int p=0; p < PENDING; p++) {
      carriage.step();
    }
    carriage.changeDir();
    */
  }

  delay(100);
  xaar128.powerDown();
  //carriage.shutdown();  
  printSummary(fails, steps);
}

void printSummary(float fails, float steps) {
  Serial.println("Done.");
  float f = fails / steps;
  Serial.print("Steps: ");
  Serial.print(steps);
  Serial.print("    Fails: ");
  Serial.print(fails);
  Serial.print("    Failure Rate: ");
  Serial.println(f, 4);
}

void loop (void) {} // end of loop