E-step calibration

Hi Forum,

I have a Problem calibrating my E-Steps on my makemendel Rapidbot 2.0.
when I extrude 20mm I'm nearly up to 24mm that are actually extruded.
I spend a whole night now to calibrate the arduino printrboard, but without any success!

this is the line of the standard calibration i received from makemendel.
_______________
#define PI 3.14159265359
//#define DEFAULT_AXIS_STEPS_PER_UNIT {((XY_MTR_STPS/MICROSTEPPING_RATIO)/(BELT_PITCH*GEAR_TEETH)), ((XY_MTR_STPS/MICROSTEPPING_RATIO)/(BELT_PITCH*GEAR_TEETH)), ((Z_MTR_STPS/MICROSTEPPING_RATIO)/Z_ROD_PITCH),((PACKING_DENSITY*EXTRUDER_MTR_STPS*EXTRUDER_GEAR_RATIO*(1/MICROSTEPPING_RATIO))/(PI*BOLT_DIAMETER))}
#define DEFAULT_AXIS_STEPS_PER_UNIT {39.79*2,39.79*2, 1706.667*2,67*2} // {X, Y, Z, E}53.637 default steps per unit,z = 1280*16/12 =
#define DEFAULT_MAX_FEEDRATE {500, 500, 5, 45} // (mm/sec)
#define DEFAULT_MAX_ACCELERATION {9000,9000,100,10000} // X, Y, Z, E maximum start speed for accelerated moves. E default values are good for skeinforge 40+, for older versions raise them a lot.
____________

with my lack of code knowledge i tied setting the default_axis_steps_per_unit E-Value.

The value now is 67*2! So (67/24) *20 = 55.8 should be the value to enter.

I verified the changes and installed it on the printer then i tried to start printing something, paused it and then measured again but still no change 24mm are feed into the hotend!

Does someone know the problem here?

Thanks,
floe

Check that your EEprom settings are not overriding your values entered.

Hey justcourious,
Thanks for your quick response!

This are the EEPROM Settings:
I cant find a line where the E-Steps could be overwritten.

// 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

// 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"
#include "thermistortables.h"

#endif //__CONFIGURATION_H

These are the statements enabling EEPROM:
/
/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

As they are undefined, the problem has to be found elsewhere.
I have no clue