Hi everyone!
To make a long story short..
6 months ago i bought a e-maker Huxley (indigogo) from a co-worker for 100$. He was building it and couldn´t get the Sanguinololu board to work, seems like there was some issue with it.
When i bought it i also bought a Melzi 2.0 board, since i am not that good in electronics i wanted something that was "plug and play".
When i started it up the first time with the sanguninololu board, i could move all the axis in positive and negative direction, no problems there.
On my Melzi on the other hand, i can´t get the Z-axis to go in both directions. Y and X is fine.
I have tried:
*Tried different firmware settings on the endstops (Noob on firmware)
*Swapped the endstops to Y and X
*Re-wiring the motors
*Checking motor currents
*Holding endstops "triggered" and moving in proterface at the same time
*Checked all the wiring
*Changed the wiring on Z-axis endstop.
I have been trying to solve this problem for many days now, i am such a noob on this and i want your help to solve the problem so i can learn more about my Huxley.
Here is a short gallery of pictures on my Melzi board, in case you can see bad solderings:
My Melzi board pictures
Here is my firmware settings (marlin):
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#ifndef CONFIGURATION_H
#define CONFIGURATION_H
// ==============================================================================
// For instructions on setting these constants, see:
// Mendel: [
reprap.org]
// Huxley: [
reprap.org]
// Uncomment ONE of the next three lines - the one for your RepRap machine
#define REPRAPPRO_HUXLEY
//#define REPRAPPRO_MENDEL //Legacy Mendel
//#define REPRAPPRO_MENDEL2 // Mono Mendel
// Uncomment ONE of the next two lines - the one for your master controller electronics
#define REPRAPPRO_MELZI
//#define REPRAPPRO_SANGUINOLOLU
// Uncomment ONE of the next two lines - the one for the series resistors on your controller
//#define SERIAL_R 4700
#define SERIAL_R 10000
// -------------------------------------------------------------------------------
#ifndef REPRAPPRO_HUXLEY
#ifndef REPRAPPRO_MENDEL
#ifndef REPRAPPRO_MENDEL2
#error Uncomment one of #define REPRAPPRO_HUXLEY, REPRAPPRO_MENDEL, or REPRAPPRO_MENDEL2 at the start of the file Configuration.h
#endif
#endif
#endif
#ifndef REPRAPPRO_MELZI
#ifndef REPRAPPRO_SANGUINOLOLU
#error Uncomment one of #define REPRAPPRO_MELZI or REPRAPPRO_SANGUINOLOLU at the start of the file Configuration.h
#endif
#endif
#ifndef SERIAL_R
#error Uncomment one of #define SERIAL_R 10000 or 4700 at the start of the file Configuration.h
#endif
// ==============================================================================
// Uncomment this if you are experimenting, know what you are doing, and want to switch off some safety
// features, e.g. allow extrude at low temperature etc.
//#define DEVELOPING
// This configurtion file contains the basic settings.
// Advanced settings can be found in Configuration_adv.h
// BASIC SETTINGS: select your board type, temperature sensor type, axis scaling, and endstop configuration
//User specified version info of THIS file to display in [Pronterface, etc] terminal window during startup.
//Implementation of an idea by Prof Braino to inform user that any changes made
//to THIS file by the user have been successfully uploaded into firmware.
#define STRING_VERSION_CONFIG_H "1.2 changed z stops" //Personal revision number for changes to THIS file.
#define STRING_CONFIG_H_AUTHOR "RRP" //Who made the changes.
// This determines the communication speed of the printer
//#define BAUDRATE 250000
#define BAUDRATE 115200
//// The following define selects which electronics board you have. Please choose the one that matches your setup
// Sanguinololu 1.2 and above = 62
// Melzi 63
#ifdef REPRAPPRO_SANGUINOLOLU
#define MOTHERBOARD 62
#endif
#ifdef REPRAPPRO_MELZI
#define MOTHERBOARD 63
#endif
//===========================================================================
//=============================Thermal Settings ============================
//===========================================================================
// Set this if you want to define the constants in the thermistor circuit
// and work out temperatures algebraically - added by AB.
// See [
en.wikipedia.org]
// BETA is the B value
// RS is the value of the series resistor in ohms
// R_INF is R0.exp(-BETA/T0), where R0 is the thermistor resistance at T0 (T0 is in kelvin)
// Normally T0 is 298.15K (25 C). If you write that expression in brackets in the #define the compiler
// should compute it for you (i.e. it won't need to be calculated at run time).
// If the A->D converter has a range of 0..1023 and the measured voltage is V (between 0 and 1023)
// then the thermistor resistance, R = V.RS/(1023 - V)
// and the temperature, T = BETA/ln(R/R_INF)
// To get degrees celsius (instead of kelvin) add -273.15 to T
// This DOES assume that all extruders use the same thermistor type.
#define ABS_ZERO -273.15
#define AD_RANGE 16383
#ifdef REPRAPPRO_HUXLEY
// Bed thermistor: VISHAY BC COMPONENTS NTCS0603E3104FXT - All Huxleys with heated bed PCB
#define BED_BETA 4100.0
#define BED_NTC 100000.0
// Extruder thermistor: RS 198-961 100k ohm 10% DO-35 NTC thermistor - All Huxleys before 25/2/14
#define E_BETA 3960.0
#define E_NTC 100000.0
// Extruder thermistor: Digikey 480-3137-ND - All Huxleys shipped after 25/2/14
//#define E_BETA 4138.0
//#define E_NTC 100000.0
#endif
#ifdef REPRAPPRO_MENDEL
// Extruder thermistor: RS 198-961 100k ohm 10% DO-35 NTC thermistor - All Mendels before 1/4/13
//#define E_BETA 3960.0
//#define E_NTC 100000.0
// Bed thermistor: RS 484-0149; EPCOS B57550G103J - All Mendels before 1/4/13
//#define BED_BETA 3480.0
//#define BED_NTC 10000.0
#endif
#ifdef REPRAPPRO_MENDEL2
// Bed thermistor: Rapid 61-0446 ; Semitec 103GT-2 - All Mendel2 shipped after 1/4/13 (launch)
// #define BED_BETA 4126.0
// #define BED_NTC 10000.0
// Bed thermistor: Farnell 1299930 ; EPCOS B57863S103F040 - All Mendel2 shipped after 29/5/14
//#define BED_BETA 3988.0
//#define BED_NTC 10000.0
// Extruder thermistor: RS 198-961 100k ohm 10% DO-35 NTC thermistor - All Mendel2 shipped after 1/4/13 (launch)
// #define E_BETA 3960.0
// #define E_NTC 100000.0
// Extruder thermistor: Digikey 480-3137-ND - All Mendels shipped after 25/2/14
//#define E_BETA 4138.0
//#define E_NTC 100000.0
#endif
#define E_RS SERIAL_R
#define E_R_INF ( E_NTC*exp(-E_BETA/298.15) )
#define BED_RS SERIAL_R
#define BED_R_INF ( BED_NTC*exp(-BED_BETA/298.15) )
#define BED_USES_THERMISTOR
#define HEATER_0_USES_THERMISTOR
#define HEATER_1_USES_THERMISTOR
#define HEATER_2_USES_THERMISTOR
// Actual temperature must be close to target for this long before M109 returns success
#define TEMP_RESIDENCY_TIME 5 // (seconds)
#define TEMP_HYSTERESIS 5 // (C°) range of +/- temperatures considered "close" to the target one
#define TEMP_WINDOW 2 // (degC) Window around target to start the recidency timer x degC early.
// The minimal temperature defines the temperature below which the heater will not be enabled It is used
// to check that the wiring to the thermistor is not broken.
// Otherwise this would lead to the heater being powered on all the time.
#define HEATER_0_MINTEMP 1
#ifdef REPRAPPRO_MULTIMATERIALS
#define HEATER_1_MINTEMP 1
#define HEATER_2_MINTEMP 1
#endif
#define BED_MINTEMP 1
// When temperature exceeds max temp, your heater will be switched off.
// This feature exists to protect your hotend from overheating accidentally, but *NOT* from thermistor short/failure!
// You should use MINTEMP for thermistor short/failure protection.
#define HEATER_0_MAXTEMP 399
#ifdef REPRAPPRO_MULTIMATERIALS
#define HEATER_1_MAXTEMP 275
#define HEATER_2_MAXTEMP 275
#endif
#define BED_MAXTEMP 150
// PID settings:
// Comment the following line to disable PID and enable bang-bang.
#define PIDTEMP
#define PID_MAX 255 // limits current to nozzle; 255=full current
#define FULL_PID_BAND 150 // Full power is applied when pid_error[e] > FULL_PID_BAND
#ifdef PIDTEMP
//#define PID_DEBUG // Sends debug data to the serial port.
#define PID_INTEGRAL_DRIVE_MAX 125 //limit for the integral term
#define K1 0.95 //smoothing factor withing the PID
#define PID_dT 0.122 //sampling period of the PID
// RepRapPro Huxley + Mendel
#define DEFAULT_Kp 12.0
#define DEFAULT_Ki (2.2*PID_dT)
#define DEFAULT_Kd (80/PID_dT)
#endif // PIDTEMP
#ifndef DEVELOPING
//this prevents dangerous Extruder moves, i.e. if the temperature is under the limit
//can be software-disabled for whatever purposes by
#define PREVENT_DANGEROUS_EXTRUDE
#define EXTRUDE_MINTEMP 170
#define EXTRUDE_MAXLENGTH (200) //prevent extrusion of very large distances.
#else
#define BOGUS_TEMPERATURE_FAILSAFE_OVERRIDE
#endif
//===========================================================================
//=============================Mechanical Settings===========================
//===========================================================================
// Endstop Settings
#define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors
// 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 = true; // set to true to invert the logic of the endstops.
// 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 false
#define DISABLE_E false // For all extruders
#ifdef REPRAPPRO_MENDEL
//#define AXES_MAX_LENGTHS {210, 210, 140}
//#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 // for Mendel set to false, for Orca set to true
//#define INVERT_E0_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
//#define INVERT_E1_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
//#define INVERT_E2_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
#endif
#ifdef REPRAPPRO_MENDEL2
//#define AXES_MAX_LENGTHS {210, 210, 140}
//#define INVERT_X_DIR true // 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 // for Mendel set to false, for Orca set to true
//#define INVERT_E0_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
//#define INVERT_E1_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
//#define INVERT_E2_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
#endif
#ifdef REPRAPPRO_HUXLEY
#define AXES_MAX_LENGTHS {155, 150, 90}
#define INVERT_X_DIR false // for Mendel set to false, for Orca set to true
#define INVERT_Y_DIR false // for Mendel set to true, for Orca set to false
#define INVERT_Z_DIR true // for Mendel set to false, for Orca set to true
#define INVERT_E0_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
#define INVERT_E1_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
#define INVERT_E2_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
#endif
// 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 true //If true, axis won't move to coordinates less than zero.
#define max_software_endstops true //If true, axis won't move to coordinates greater than the defined lengths below.
// The position of the homing switches. Use MAX_LENGTH * -0.5 if the center should be 0, 0, 0
#define X_HOME_POS 0
#define Y_HOME_POS 0
#define Z_HOME_POS 0
//// MOVEMENT SETTINGS
#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
/*
We've shipped a number of different configurations of belt and pulley now, so probably need some ifdef statements! At the moment, they all get the same.
White polyurethane belt (T2.5), 14-tooth printed pulley: 91.4286 step per mm (Original Huxley, Legacy Mendel)
Black rubber belt (MXL), 17-tooth printed pulley: 92.635 step per mm (Huxley, Mendel Mono and Tri since 1/4/2013)
Black rubber belt (MXL), 18-tooth aluminium pulley: 87.489 step per mm (Huxley, Mendel Mono and Tri since 1/1/2014)
Also, two different extruders:
Original eMaker/RepRapPro-style: 920 steps per mm (Original Huxley, Legacy Mendel)
New version (NEMA14 and NEMA17): 660 steps per mm (Huxley, Mendel Mono and Tricolour since 1/4/2013)
*/
#ifdef REPRAPPRO_MENDEL
//#define X_MAX_LENGTH 210
//#define Y_MAX_LENGTH 210
//#define Z_MAX_LENGTH 110
//#define HOMING_FEEDRATE {10*60, 10*60, 1*60, 0} // set the homing speeds (mm/min)
//#define FAST_HOME_FEEDRATE {50*60, 50*60, 1*60, 0} // set the homing speeds (mm/min)
//#define DEFAULT_MAX_FEEDRATE {500, 500, 3, 45}
//#define DEFAULT_MAX_FEEDRATE {300, 300, 3, 45} // (mm/sec)
//#define DEFAULT_MAX_ACCELERATION {800,800,30,250} // X, Y, Z, E maximum start speed for accelerated moves. E default values
// X, Y, Z, E steps per mm
//#define DEFAULT_AXIS_STEPS_PER_UNIT {91.4286, 91.4286, 4000, 920.0} // <- 14 tooth T2.5 belt + original extruder drive
#else
#ifdef REPRAPPRO_MENDEL2
//#define X_MAX_LENGTH 210
//#define Y_MAX_LENGTH 210
//#define Z_MAX_LENGTH 110
//#define HOMING_FEEDRATE {10*60, 10*60, 1*60, 0} // set the homing speeds (mm/min)
//#define FAST_HOME_FEEDRATE {50*60, 50*60, 1*60, 0} // set the homing speeds (mm/min)
//#define DEFAULT_MAX_FEEDRATE {500, 500, 3, 45}
//#define DEFAULT_MAX_FEEDRATE {300, 300, 3, 45} // (mm/sec)
//#define DEFAULT_MAX_ACCELERATION {800,800,30,250} // X, Y, Z, E maximum start speed for accelerated moves. E default values
// X, Y, Z, E steps per mm
//#define DEFAULT_AXIS_STEPS_PER_UNIT {87.489, 87.489, 4000, 660.0} // <- 18-tooth aluminium pulley
//#define DEFAULT_AXIS_STEPS_PER_UNIT {92.635, 92.635, 4000, 660} // <- 17-tooth printed pulley
#else
#define X_MAX_LENGTH 155
#define Y_MAX_LENGTH 150
#define Z_MAX_LENGTH 90
#define HOMING_FEEDRATE {10*60, 10*60, 1*60, 0} // set the homing speeds (mm/min)
#define FAST_HOME_FEEDRATE {80*60, 80*60, 4*60, 0} // set the homing speeds (mm/min)
#define DEFAULT_MAX_FEEDRATE {500, 500, 5, 45} // (mm/sec)
#define DEFAULT_MAX_FEEDRATE {500, 500, 5, 45} // (mm/sec)
#define DEFAULT_MAX_ACCELERATION {1000,1000,50,250} // X, Y, Z, E maximum start speed for accelerated moves. E default values
// X, Y, Z, E steps per mm
//#define DEFAULT_AXIS_STEPS_PER_UNIT {87.489, 87.489, 4000, 660.0} // <- 18-tooth aluminium pulley
//#define DEFAULT_AXIS_STEPS_PER_UNIT {92.635, 92.635, 4000, 660} // <- 17-tooth printed pulley
#define DEFAULT_AXIS_STEPS_PER_UNIT {91.4286, 91.4286, 4000, 920.0} // <- 14 tooth T2.5 belt + original extruder drive
#endif
#endif
// Defaults changed by the G10 command
#define X_EXTRUDER_OFFSET 0
#define Y_EXTRUDER_OFFSET 0
#define Z_EXTRUDER_OFFSET 0
#define STANDBY_TEMP 140
#define PLA_TEMP 205
#define ABS_TEMP 250
#define DEFAULT_TEMP PLA_TEMP
#define DEFAULT_ACCELERATION 1000 // X, Y, Z and E max acceleration in mm/s^2 for printing moves
#define DEFAULT_RETRACT_ACCELERATION 1000 // X, Y, Z and E max acceleration in mm/s^2 for r retracts
//
#define DEFAULT_XYJERK 15.0 // (mm/sec)
#define DEFAULT_ZJERK 0.4 // (mm/sec)
#define DEFAULT_EJERK 15.0 // (mm/sec)
//===========================================================================
//=============================Additional Features===========================
//===========================================================================
// EEPROM
// the microcontroller can store settings in the EEPROM, e.g. max velocity...
// M500 - stores paramters in EEPROM
// M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily).
// M502 - reverts to the default "factory settings". You still need to store them in EEPROM afterwards if you want to.
//define this to enable eeprom support
#define EEPROM_SETTINGS
//to disable EEPROM Serial responses and decrease program space by ~1700 byte: comment this out:
// please keep turned on if you can.
#define EEPROM_CHITCHAT
//LCD and SD support
//#define ULTRA_LCD //general lcd support, also 16x2
#define SDSUPPORT // Enable SD Card Support in Hardware Console
//#define ULTIPANEL
#ifdef ULTIPANEL
//#define NEWPANEL //enable this if you have a click-encoder panel
#define SDSUPPORT
#define ULTRA_LCD
#define LCD_WIDTH 20
#define LCD_HEIGHT 4
// Preheat Constants
#define PLA_PREHEAT_HOTEND_TEMP 180
#define PLA_PREHEAT_HPB_TEMP 70
#define PLA_PREHEAT_FAN_SPEED 255 // Insert Value between 0 and 255
#define ABS_PREHEAT_HOTEND_TEMP 240
#define ABS_PREHEAT_HPB_TEMP 100
#define ABS_PREHEAT_FAN_SPEED 255 // Insert Value between 0 and 255
#else //no panel but just lcd
#ifdef ULTRA_LCD
#define LCD_WIDTH 16
#define LCD_HEIGHT 2
#endif
#endif
// Enable uM-FPU support:
#define UMFPUSUPPORT 1
// M240 Triggers a camera by emulating a Canon RC-1 Remote
// Data from: [
www.doc-diy.net]
// #define PHOTOGRAPH_PIN 23
#include "Configuration_adv.h"
#endif //__CONFIGURATION_H
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Thanks a lot for all the reading, hope you can help me!

Sorry for my bad english, i am from Sweden

Best Regards,
Johannes