I reversed Y-axis, software fix?

Hello!

I have reversed my Y-axis, and I forgot untill I was printing some text today...

Reason for why I reversed the axis is that I would like to have motor and power input on the back side of my printer and LCD + USB on the front side.

Wait.

Maybe I can switch it back, but write in the end.gcode to move the Y to max (min is endswitch)? Hmm, i might have found a way...

I wounder, is there a way I can reverse the Y-axis without rotating the stepper wires and moving the end switch over to the other side?

All suggestions are appreciated!

Regards

Edited 1 time(s). Last edit at 10/17/2013 03:52PM by Itek.

You can reverse the Y direction in firmware, just change the following line:

#define INVERT_Y_DIR

You can also change the endstop to be at the max instead of min by changing the following line:

#define Y_HOME_DIR

That is assuming you are using Marlin firmware. Others should be similar.

Edited 1 time(s). Last edit at 10/17/2013 04:07PM by NewPerfection.

---

Help improve the RepRap wiki! Just click "Edit" in the top-right corner of the page and start typing. Anyone can edit the wiki!

Yeah!
Im using marlin

Thanks

I have tried to change the values now, but the board will not move to home if I change:

#define Y_HOME_DIR -1

to:
#define Y_HOME_DIR 1

You will also need to have the endstop plugged into Y max on RAMPS instead of Y min.

---

Help improve the RepRap wiki! Just click "Edit" in the top-right corner of the page and start typing. Anyone can edit the wiki!

Ahaa... I didnt know, thanks!

Y axis is still not moving

I have changed:
#define INVERT_Y_DIR (from false to true)
#define Y_HOME_DIR (from -1 to 1)
Moved the endstop contact from - to +


My problem in pictures:
[spoiler]
Picture of print before I changed anything (!)


Screenshot of repetier host:


[/spoiler]

Part of my configuration.h:
[spoiler]
//===========================================================================
//=============================Mechanical Settings===========================
//===========================================================================

// Uncomment the following line to enable CoreXY kinematics
// #define COREXY

// coarse Endstop Settings
#define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors

#ifndef ENDSTOPPULLUPS
// fine Enstop settings: Individual Pullups. will be ignord if ENDSTOPPULLUPS is defined
#define ENDSTOPPULLUP_XMAX
#define ENDSTOPPULLUP_YMAX
#define ENDSTOPPULLUP_ZMAX
#define ENDSTOPPULLUP_XMIN
#define ENDSTOPPULLUP_YMIN
//#define ENDSTOPPULLUP_ZMIN
#endif

#ifdef ENDSTOPPULLUPS
#define ENDSTOPPULLUP_XMAX
#define ENDSTOPPULLUP_YMAX
#define ENDSTOPPULLUP_ZMAX
#define ENDSTOPPULLUP_XMIN
#define ENDSTOPPULLUP_YMIN
#define ENDSTOPPULLUP_ZMIN
#endif

// The pullups are needed if you directly connect a mechanical endswitch between the signal and ground pins.
const bool X_ENDSTOPS_INVERTING = false; // set to true to invert the logic of the endstops.
const bool Y_ENDSTOPS_INVERTING = false; // set to true to invert the logic of the endstops.
const bool Z_ENDSTOPS_INVERTING = false; // set to true to invert the logic of the endstops.
//#define DISABLE_MAX_ENDSTOPS
//#define DISABLE_MIN_ENDSTOPS

// Disable max endstops for compatibility with endstop checking routine
#if defined(COREXY) && !defined(DISABLE_MAX_ENDSTOPS)
#define DISABLE_MAX_ENDSTOPS
#endif

// For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
#define X_ENABLE_ON 0
#define Y_ENABLE_ON 0
#define Z_ENABLE_ON 0
#define E_ENABLE_ON 0 // For all extruders

// Disables axis when it's not being used.
#define DISABLE_X false
#define DISABLE_Y false
#define DISABLE_Z true//false
#define DISABLE_E false // For all extruders

#define INVERT_X_DIR false // for Mendel set to false, for Orca set to true
#define INVERT_Y_DIR true // for Mendel set to true, for Orca set to false
#define INVERT_Z_DIR false//true // for Mendel set to false, for Orca set to true
#define INVERT_E0_DIR false // for direct drive extruder v9 set to true, for geared extruder set to false
#define INVERT_E1_DIR false // for direct drive extruder v9 set to true, for geared extruder set to false
#define INVERT_E2_DIR false // for direct drive extruder v9 set to true, for geared extruder set to false

// ENDSTOP SETTINGS:
// Sets direction of endstops when homing; 1=MAX, -1=MIN
#define X_HOME_DIR -1
#define Y_HOME_DIR 1
#define Z_HOME_DIR -1

#define min_software_endstops false//true //If true, axis won't move to coordinates less than HOME_POS.
#define max_software_endstops true //If true, axis won't move to coordinates greater than the defined lengths below.
// Travel limits after homing
#define X_MAX_POS 230//205
#define X_MIN_POS 0
#define Y_MAX_POS 250//205
#define Y_MIN_POS 0
#define Z_MAX_POS 170//200
#define Z_MIN_POS 0

#define X_MAX_LENGTH (X_MAX_POS - X_MIN_POS)
#define Y_MAX_LENGTH (Y_MAX_POS - Y_MIN_POS)
#define Z_MAX_LENGTH (Z_MAX_POS - Z_MIN_POS)

// The position of the homing switches
//#define MANUAL_HOME_POSITIONS // If defined, MANUAL_*_HOME_POS below will be used
//#define BED_CENTER_AT_0_0 // If defined, the center of the bed is at (X=0, Y=0)

//Manual homing switch locations:
// For deltabots this means top and center of the cartesian print volume.
#define MANUAL_X_HOME_POS 0
#define MANUAL_Y_HOME_POS 0
#define MANUAL_Z_HOME_POS 0
//#define MANUAL_Z_HOME_POS 402 // For delta: Distance between nozzle and print surface after homing.

[/spoiler]

Edited 2 time(s). Last edit at 10/19/2013 05:28AM by Itek.

Found an easier solution. Changed everything back to original and edited the end.gcode to move the print foreward at the end.

Sometimes its easier to think simply!