Code Interpretation

Projects Programming
1

Hello All,

I need to know what tower 3’s, x and y are doing, but I need to understand where the values of the x and y are coming from. I believe this is z motor and that is why it is different but I am not understanding where the numbers are coming from? (please see below)

// Effective X/Y positions of the three vertical towers.
#define SIN_60 0.8660254037844386
#define COS_60 0.5
#define DELTA_TOWER1_X -SIN_60DELTA_RADIUS // front left tower
#define DELTA_TOWER1_Y -COS_60DELTA_RADIUS
#define DELTA_TOWER2_X SIN_60DELTA_RADIUS // front right tower
#define DELTA_TOWER2_Y -COS_60DELTA_RADIUS
#define DELTA_TOWER3_X 0.5 // back middle tower
#define DELTA_TOWER3_Y DELTA_RADIUS

Thanks!

2

Hello All,

I believe that Arduino Code and Marlin are generating a effective print radius smaller than I want (refer to image attached). Could anyone tell me if this is true, and if so, is there any solution to gain an effective print radius?(please also see attached image)

My Arduino H configuration;

// Effective X/Y positions of the three vertical towers.
#define SIN_60 0.8660254037844386
#define COS_60 0.5
#define DELTA_TOWER1_X -SIN_60DELTA_RADIUS // front left tower
#define DELTA_TOWER1_Y -COS_60DELTA_RADIUS
#define DELTA_TOWER2_X SIN_60DELTA_RADIUS // front right tower
#define DELTA_TOWER2_Y -COS_60DELTA_RADIUS
#define DELTA_TOWER3_X 0.5 // back middle tower
#define DELTA_TOWER3_Y DELTA_RADIUS

My Marlin Main;

void calculate_delta(float cartesian[3])
{
delta[X_AXIS] = sqrt(sq(DELTA_DIAGONAL_ROD)

  • sq(DELTA_TOWER1_X-cartesian[X_AXIS])
  • sq(DELTA_TOWER1_Y-cartesian[Y_AXIS])
    ) + cartesian[Z_AXIS];
    delta[Y_AXIS] = sqrt(sq(DELTA_DIAGONAL_ROD)
  • sq(DELTA_TOWER2_X-cartesian[X_AXIS])
  • sq(DELTA_TOWER2_Y-cartesian[Y_AXIS])
    ) + cartesian[Z_AXIS];
    delta[Z_AXIS] = sqrt(sq(DELTA_DIAGONAL_ROD)
  • sq(DELTA_TOWER3_X-cartesian[X_AXIS])
  • sq(DELTA_TOWER3_Y-cartesian[Y_AXIS])
    ) + cartesian[Z_AXIS];
    /*
    SERIAL_ECHOPGM("cartesian x="); SERIAL_ECHO(cartesian[X_AXIS]);
    SERIAL_ECHOPGM(" y="); SERIAL_ECHO(cartesian[Y_AXIS]);
    SERIAL_ECHOPGM(" z="); SERIAL_ECHOLN(cartesian[Z_AXIS]);

SERIAL_ECHOPGM("delta x="); SERIAL_ECHO(delta[X_AXIS]);
SERIAL_ECHOPGM(" y="); SERIAL_ECHO(delta[Y_AXIS]);
SERIAL_ECHOPGM(" z="); SERIAL_ECHOLN(delta[Z_AXIS]);
*/
}

void adjust_delta(float cartesian[3])
{
int grid_x = max(0, min(7, int(cartesian[X_AXIS]/25.0 + 3.5)));
int grid_y = max(0, min(7, int(cartesian[Y_AXIS]/25.0 + 3.5)));
float offset = bed_level[grid_x][grid_y];

delta[X_AXIS] += offset;
delta[Y_AXIS] += offset;
delta[Z_AXIS] += offset;

/*
SERIAL_ECHOPGM("grid_x="); SERIAL_ECHO(grid_x);
SERIAL_ECHOPGM(" grid_y="); SERIAL_ECHO(grid_y);
SERIAL_ECHOPGM(" offset="); SERIAL_ECHOLN(offset);
*/
}

Thanks!

IMG_26051.jpg
IMG_26051.jpg1728×2304 81.5 KB

3

Nothing attached.

We need all the code. I would suspect an integer round-off error. It might be better to ask on a Marlin board, since there seems to be a lot of stuff behind the scenes.

4

I suggest that you get together with this guy, and PAY ATTENTION.

http://forum.arduino.cc/index.php?topic=431443.msg2974239#msg2974239

5

This question needs to be addressed to a Marlin expert. Marlin is a complex ready-made program. This Forum is about helping people write their own programs.

...R

6

3 active posts on the front page of the Forum, and you still didn't bother to read the correct way to post here. Please read the post by Nick Gammon at the top of this page, especially about using code tags when posting source code.