can´t select negative zoffset

[hugolainch]

Hi all! I have adapted an E3D extruder on my Atom 2.0 (delta printer) to have the possibility of using an all metal extruder. I am using an external zprobe with has the following offset x=0 y=-16.90 z=-5.0. I need some help with the firm (based on v1.0.0) because I have updated the values and the G29 auto leveling works fine and then the firm applies the following fórmula: zoffset=zprobe_offset+LCDzoffset_selected. My problem is that my zprobe has an offset of -4.5mm with the nozzle so, when the firm applies last formula I get a negative value for zoffset, and when I tried to adjust for the first layer the lcd puts extrange symbols (see attached). It is caused because you cant select a negative value for the zoffset, so to adjust the offset I have to select a possitive value for the offset and repeat again the bed leveling to obtain the new negative value. After 6 iterations I had been able to adjust fine but i have to repeat the bed leveling each time that i modify the zoffset that is crazy. I have found the line where It is supposed you select the zoffset on lcd. "Ultralcd.cpp" As you can see the range is between -10 and 70. I can reach 70 on the lcd but I cant reach less than 0...

configuration.h

define Z_PROBE_OFFSET {0, -16.9, -4.84, 0} // X, Y, Z, E distance between hotend nozzle and deployed bed leveling probe.

marlin_main.cpp deploy_z_probe();

z_offset = z_probe_offset[Z_AXIS] + (code_seen(axis_codes[Z_AXIS]) ? code_value() : z_offset); calibrate_print_surface(); retract_z_probe();

feedrate = 6000; feedmultiply = saved_feedmultiply; previous_millis_cmd = millis(); endstops_hit_on_purpose();

Config_StoreSettings(); break; case 30: // G29 Calibrate print surface with automatic Z probe. saved_feedrate = 6000*3.5; saved_feedmultiply = feedmultiply; feedmultiply = 100;

home_delta_axis(); //Bato add for auto homing ATOM when G29

ultralcd.cpp static void lcd_setting_zoffset_menu() { START_MENU(); MENU_ITEM(back, MSG_MAIN, lcd_main_menu); MENU_ITEM(gcode, MSG_AUTO_LEVEL, PSTR("G29")); MENU_ITEM(function, MSG_GOTO_ZERO, deploy_z_zero); MENU_ITEM_EDIT_CALLBACK(float52, MSG_ZOFFSET, &z_offset, -10.0, 70, Config_StoreSettings); END_MENU(); }

ATOM-2.0.6- Bondtech 200x830.zip

[boelle]

my configuration.h looks like this:

define X_PROBE_OFFSET_FROM_EXTRUDER 23 // X offset: -left +right [of the nozzle]

define Y_PROBE_OFFSET_FROM_EXTRUDER 9 // Y offset: -front +behind [the nozzle]

define Z_PROBE_OFFSET_FROM_EXTRUDER -0.26 // Z offset: -below +above [the nozzle]

the complete configuration.h file: https://pastebin.com/U5ukpLFb configuration_adv.h if its usefull: https://pastebin.com/JZedKCnS

[hugolainch]

Thanks for your reply! And with that configuration are you able to select a negative offset on the lcd screen?

[boelle]

first of all the lines from your config is VERY different

what version of marlin do you run?

[boelle]

will check about LCD when my print is done, but i never change it

[hugolainch]

It is the firm suministrated from the Atom 3dp printer Seller. I think is based on v1.0.0. The zprobe offsets are a bit different defined on configuration.h file and It works, but when i try to regulate It on the lcd It crashes for negative zoffset values. However as you can see on ultralcd.cpp It is defined a range between -10 and 70! And if you never change It, how do you control the zoffset for the first layer?

[boelle]

i would start with making sure what you got

maybe upgrade to MArlin 2.0

without knowing precise what you got its hards to diagnose the problem

[hugolainch]

/ -- c++ -- /

/* Reprap firmware based on Sprinter and grbl. Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/. */

/* This firmware is a mashup between Sprinter and grbl. (https://github.com/kliment/Sprinter) (https://github.com/simen/grbl/tree)

It has preliminary support for Matthew Roberts advance algorithm http://reprap.org/pipermail/reprap-dev/2011-May/003323.html */

/ All the implementation is done in .cpp files to get better compatibility with avr-gcc without the Arduino IDE / / Use this file to help the Arduino IDE find which Arduino libraries are needed and to keep documentation on GCode */

include "Configuration.h"

include "pins.h"

ifdef ULTRA_LCD

if defined(LCD_I2C_TYPE_PCF8575)

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

elif defined(LCD_I2C_TYPE_MCP23017) || defined(LCD_I2C_TYPE_MCP23008)

#include <Wire.h>
#include <LiquidTWI2.h>

elif defined(DOGLCD)

#include <U8glib.h> // library for graphics LCD by Oli Kraus (https://code.google.com/p/u8glib/)

else

#include <LiquidCrystal.h> // library for character LCD

endif

endif

if defined(DIGIPOTSS_PIN) && DIGIPOTSS_PIN > -1

include

endif

[boelle]

so you upgraded to bugfix 2.0?

[boelle]

@thinkyhead think we can close this one

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