I would like to know if I can define as a home position 300 and not zero
I use accel steper library in my code and if i set as curent position 300 in homming mode it not work corectly
I will also attach the code I use (piece of code)
if anyone knows anything about this please help.
thanks
void home() {
if(state == 3){
lcd.begin(); // initialize the lcd
// Print a message to the LCD.
lcd.backlight();
lcd.setCursor(3,0);
lcd.print("START HOMMING!");
lcd.setCursor(1,1);
lcd.print("");
lcd.setCursor(4,2);
lcd.print("W A I T");
stepper.setMaxSpeed(600.0); // Set Max Speed of Stepper (Slower to get better accuracy)
stepper.setAcceleration(100.0); // Set Acceleration of Stepper
digitalWrite(sol, HIGH);
while (digitalRead(Home_Switch)) { // Make the Stepper move CCW until the switch is activated
digitalWrite(RedLed, HIGH);
stepper.moveTo(initial_homing); // Set the position to move to
initial_homing--; // Decrease by 1 for next move if needed
stepper.run(); // Start moving the stepper
digitalWrite(RedLed, HIGH);
delay(5);
}
stepper.setCurrentPosition(0); // Set the current position as zero for now
stepper.setMaxSpeed(600.0); // Set Max Speed of Stepper (Slower to get better accuracy)
stepper.setAcceleration(100.0); // Set Acceleration of Stepper
initial_homing=1;
while (!digitalRead(Home_Switch)) { // Make the Stepper move CW until the switch is deactivated
stepper.moveTo(initial_homing);
stepper.run();
initial_homing++;
digitalWrite(RedLed, LOW);
digitalWrite(GreenLed, HIGH);
}
delay(10);
digitalWrite(sol, LOW);
stepper.setCurrentPosition(300); //<==========Home position at end of homing
currentposition="300";
state=0;
// Draw starting screen on LCD
lcd.begin(); // initialize the lcd
lcd.clear();
lcd.backlight();
lcd.setCursor(3,0);
lcd.print("HOMMING COMPLETE");
lcd.setCursor(3,1);
lcd.print("cur-pos: ");
lcd.setCursor(12 , 1);
lcd.print(currentposition);
lcd.setCursor(3,2);
lcd.print("PLEASE WAIT:");
lcd.clear();
// AccelStepper speed and acceleration setup
stepper.setMaxSpeed(1200); // Not to fast or you will have missed steps
stepper.setAcceleration(150); // Same here
lcd.backlight();
lcd.setCursor(2,0);
lcd.print("ENTER DISTANCE");
lcd.setCursor(2,1);
lcd.print( "MM==>");
lcd.setCursor(0,2);
lcd.print("------------------");
lcd.setCursor(0,3);
lcd.print("cur-pos");
lcd.setCursor(8,3);
lcd.print(currentposition);
}
x=1;
}
I do not want to pretend. I want to be the real position because it must be true of the 300 position
If we pretend it is 300 when I press on the keypad 300 does not stay the stepper in the Home (300) position but it goes +300
when I type 0 goes a litle back
PROFILCA:
If we pretend it is 300 when I press on the keypad 300 does not stay the stepper in the Home (300) position but it goes +300
when I type 0 goes a litle back
To make sense of that we need to see the complete program.
What's the difference between {A} setting HOME as 300 and getting the motor to move to 0 and {B} setting HOME as 0 and getting the motor to move to -300 ?
All that you say is right and reasonable but I have a difficulty due to the construction of the project.
I want to make a meter for an aluminum saw and the moving part can not get close to the disk at point 0.
The request is to have a lower position of 300 and begin to count from 300
To ensure do not move under 300 I have the code(part of code)
void movestepper(int z) {
// Move the stepper
if(keyfullnumber > 3950 || keyfullnumber <300){ //set the maximum and minimum distance
stepper.stop();
}
But the problem is that after the zeroing (at 300 μm) on the first movement does not remove these 300 from the requested length.
If I enter a distance of 400 or something else goes to 700 (400 + 300) while it should be (300 + 100) = 400
I do not know if it is clear what exactly is the problem I have with this construction.
I made some modification to the code can you tell me if it is right?
(stepper.runToNewPosition(300-300)
Thank you all for your help
void home() {
if(state == 3){
lcd.begin(); // initialize the lcd
// Print a message to the LCD.
lcd.backlight();
lcd.setCursor(3,0);
lcd.print("START HOMMING!");
lcd.setCursor(1,1);
lcd.print("");
lcd.setCursor(4,2);
lcd.print("W A I T");
stepper.setMaxSpeed(600.0); // Set Max Speed of Stepper (Slower to get better accuracy)
stepper.setAcceleration(100.0); // Set Acceleration of Stepper
digitalWrite(sol, HIGH);
while (digitalRead(Home_Switch)) { // Make the Stepper move CCW until the switch is activated
digitalWrite(RedLed, HIGH);
stepper.moveTo(initial_homing); // Set the position to move to
initial_homing--; // Decrease by 1 for next move if needed
stepper.run(); // Start moving the stepper
digitalWrite(RedLed, HIGH);
delay(5);
}
stepper.setCurrentPosition(0); // Set the current position as zero for now
stepper.setMaxSpeed(100.0); // Set Max Speed of Stepper (Slower to get better accuracy)
stepper.setAcceleration(50.0); // Set Acceleration of Stepper
initial_homing=1;
while (!digitalRead(Home_Switch)) { // Make the Stepper move CW until the switch is deactivated
stepper.moveTo(initial_homing);
stepper.run();
initial_homing++;
digitalWrite(RedLed, LOW);
digitalWrite(GreenLed, HIGH);
}
delay(10);
digitalWrite(sol, LOW);
stepper.setCurrentPosition(0);
currentposition="300";
state=0;
// Draw starting screen on LCD
lcd.begin(); // initialize the lcd
lcd.clear();
lcd.backlight();
lcd.setCursor(3,0);
lcd.print("HOMMING COMPLETE");
lcd.setCursor(3,1);
lcd.print("cur-pos: ");
lcd.setCursor(12 , 1);
lcd.print(currentposition);
lcd.setCursor(3,2);
lcd.print("PLEASE WAIT:");
lcd.clear();
// AccelStepper speed and acceleration setup
stepper.setMaxSpeed(600); // Not to fast or you will have missed steps
stepper.setAcceleration(100); // Same here
lcd.backlight();
lcd.setCursor(2,0);
lcd.print("ENTER DISTANCE");
lcd.setCursor(2,1);
lcd.print( "MM==>");
lcd.setCursor(0,2);
lcd.print("------------------");
lcd.setCursor(0,3);
lcd.print("cur-pos");
lcd.setCursor(8,3);
lcd.print(currentposition);
}
state=1;
if (state==1){
stepper.runToNewPosition(300-300); //<====== is this right?
currentposition = ("300");
lcd.clear();
lcd.backlight();
lcd.setCursor(2,0);
lcd.print("ENTER DISTANCE");
lcd.setCursor(2,1);
lcd.print( "MM");
lcd.setCursor(0,2);
lcd.print("cur-pos");
lcd.setCursor(8,2);
lcd.print(currentposition);
lcd.clear();
}
x=1;
}
There is a limit switch to define the HOME position
But the lowest acceptable working position is 300 steps above that position.
If that is correct then I think you should set your HOME position at 0 (zero), then move the motor 300 steps and after that make sure that your step count never falls below 300.
That’s what I tried at the end of the home process and worked on
I do not know if this is the right way, but it works and does what I want
stops at 300 and gets a value of 300 and not 0
while (!digitalRead(Home_Switch)) { // Make the Stepper move CW until the switch is deactivated
stepper.moveTo(initial_homing);
stepper.run();
initial_homing++;
digitalWrite(RedLed, LOW);
digitalWrite(GreenLed, HIGH);
}
delay(10);
digitalWrite(sol, LOW);
stepper.setCurrentPosition(600); <=====from 0 to 600
currentposition="300";
However, thank you all for your help was valuable.
If you have any observation I am happy to see
Excuse me if I’m mistaken in writing but translating through google translation
Okay, I’ll try to do what you say by modifying some mechanical parts if I can make it.
However, this false way to the code worked but I do not know if it will be stable.
In any case thank you very much all your help is always precious to me.
Thanks to all.
It is perfectly reasonable to mount a home switch at physical position 300. And you should be able to keep referring to that position as 300 in all of your high-level code.
Be sure though, to always perform the homing function from one side of home. The “width” of the switch is probably significant and you should always try to pick up the same “edge” of the switch.
stepper.setCurrentPosition(300); //<==========Home position at end of homing
currentposition=“300”;
Good, but why is currentposition a string? Strings are for letters and words, not numbers.
Use the stepper.currentPosition() to find out where the stepper is.
MorganS:
It is perfectly reasonable to mount a home switch at physical position 300. And you should be able to keep referring to that position as 300 in all of your high-level code.
If you can mount the switch at the right place I don't see the point of calling it 300 rather than zero
I have been assuming that the OP's problem is that he cannot mount the switch at the ideal position. But I may be wrong.
That’s right.
The moving part can not go closer than 300 to the 0 point.
I place limit switcjh for home to 300 cm away from zero point and i want after zeroin the machine to start counting from 300cm and plus.
And then make sure that none of the moves go to a position below 300.(the working area is from 300 to 3950)
void movestepper(int z) {
// Move the stepper
if(keyfullnumber > 3950 || keyfullnumber <300){ //set the maximum and minimum distance
stepper.stop();
to approach point 0, I need to convert the machine, which is quite difficult.
That’s what I’m trying to get through the code
