Pressing X home (pronterface) button and extruder goes away from the endstop Hi. I've just finished to build my first 3d printer, a Prusa i3 Rework. I'm trying to modify the Configuration.h file but I'm having problems configuring home position. My three endstops are positioned exactly like in the following picture: just because I still don't have understood how you have to place yourself when describing your 3d printer (just let me know) I usually describe my 3d printer considering myself placed in the same position of the Y endstop, looking at the RAMPS board and the "mirrored" PRUSA sign. Visuel_Prusa_i3_Rework_small_display_large.jpg mod_embed_images_loadimage('8f21c19995f1129ffb94d48349e33872', '/forum/thumbcache/1a6/f30/a11/cb2/9af/6e4/40b/fc4/43c/d34/61_800x400.png', 'http://www.mon-club-elec.fr/mes_images/reprap/Visuel_Prusa_i3_Rework_small_display_large.jpg', 'https://reprap.org/forum/addon.php?1,module=embed_images,check_scaling=1,url=http%3A%2F%2Fwww.mon-club-elec.fr%2Fmes_images%2Freprap%2FVisuel_Prusa_i3_Rework_small_display_large.jpg', '', 561809, 800, 400, 'Loading image ...', false); So.. I have 3 endstops and it seems that it is useful to consider them as MIN endstops and possibly use *_MAX_POS parameters. Am I right ? While connected using pronterface, motors seems to work accurately, even if now I'm noticing Y motor has sometimes difficulties to bring forward (distant from the Y endstop) the hot bed, grating a little bit (this is a new problem because as you can read I was focused on the X motor): it seems that once pronterface is connected, the 3d printer believes to be positioned at 0,0,0 so every X-, Y- or Z- command is ignored. This is happening to me. Is it normal ? When I press Y or Z home buttons from pronterface, Y and Z motors go to their respective endstops and they stop opportunely. When I instead press X home button, the extruder goes to the right and not to the endstop positioned on the left. How can I modify the Configuration.h file so when X home button is pressed the extruder can point to the left where it would find the endstop ? I'm attacching the Configuration.h file I'm using. Thank you! Marco https://reprap.org/forum/read.php?1,561809,561809#msg-561809 Sat, 08 Aug 2026 03:23:38 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,561809,575414#msg-575414 Re: Pressing X home (pronterface) button and extruder goes away from the endstop https://reprap.org/forum/read.php?1,561809,575414#msg-575414
Yesterday I was able to correctly setup my 3D printer.

I'm attaching again my file Configuration.h]]> marco1974 General Mon, 26 Oct 2015 05:48:12 -0400 https://reprap.org/forum/read.php?1,561809,562313#msg-562313 Re: Pressing X home (pronterface) button and extruder goes away from the endstop https://reprap.org/forum/read.php?1,561809,562313#msg-562313
First check direction of movement of X, X+ movement should move the head right, X- movemnt should move the head left.
If this is incorrect you need to change #define INVERT_X_DIR true to #define INVERT_X_DIR false (or turn the stepper plug around 180 degrees, while power is off , but not both firmware and plug!)

The pictured the endstop is a X max, and you need to set #define X_HOME_DIR 1 (this looks correct for you)
You may need to tweak #define X_MAX_POS 190 this set the size of you X axis... not sure why its not the full 200.]]> Dust General Thu, 24 Sep 2015 22:12:47 -0400 https://reprap.org/forum/read.php?1,561809,561906#msg-561906 Re: Pressing X home (pronterface) button and extruder goes away from the endstop https://reprap.org/forum/read.php?1,561809,561906#msg-561906 Putzer General Thu, 24 Sep 2015 01:06:10 -0400 https://reprap.org/forum/read.php?1,561809,561853#msg-561853 Re: Pressing X home (pronterface) button and extruder goes away from the endstop https://reprap.org/forum/read.php?1,561809,561853#msg-561853 If I disconnect the motor (using pronterface I mean) and then I manually move the extruder to the left (few mm near the X_MIN endstop) I can move it without problem with pronterface commands: the problem begins when I press X home button. I'm expecting the extruder goes few mm back touching the X_MIN endstop, while instead it starts pointing to the right.

I only would like to constrain the extruder pointing to the left where is my endstop, even if now when I play X+ the extruder goes to the right and when I press X- it goes to the left.]]> marco1974 General Wed, 23 Sep 2015 18:36:42 -0400 https://reprap.org/forum/read.php?1,561809,561850#msg-561850 Re: Pressing X home (pronterface) button and extruder goes away from the endstop https://reprap.org/forum/read.php?1,561809,561850#msg-561850 khannon3 General Wed, 23 Sep 2015 18:19:31 -0400 https://reprap.org/forum/read.php?1,561809,561809#msg-561809 Pressing X home (pronterface) button and extruder goes away from the endstop https://reprap.org/forum/read.php?1,561809,561809#msg-561809 I've just finished to build my first 3d printer, a Prusa i3 Rework.

I'm trying to modify the Configuration.h file but I'm having problems configuring home position.
My three endstops are positioned exactly like in the following picture: just because I still don't have understood how you have to place yourself when describing your 3d printer (just let me know) I usually describe my 3d printer considering myself placed in the same position of the Y endstop, looking at the RAMPS board and the "mirrored" PRUSA sign.


So.. I have 3 endstops and it seems that it is useful to consider them as MIN endstops and possibly use *_MAX_POS parameters. Am I right ?

While connected using pronterface, motors seems to work accurately, even if now I'm noticing Y motor has sometimes difficulties to bring forward (distant from the Y endstop) the hot bed, grating a little bit (this is a new problem because as you can read I was focused on the X motor): it seems that once pronterface is connected, the 3d printer believes to be positioned at 0,0,0 so every X-, Y- or Z- command is ignored. This is happening to me. Is it normal ?

When I press Y or Z home buttons from pronterface, Y and Z motors go to their respective endstops and they stop opportunely.
When I instead press X home button, the extruder goes to the right and not to the endstop positioned on the left. How can I modify the Configuration.h file so when X home button is pressed the extruder can point to the left where it would find the endstop ?
I'm attacching the Configuration.h file I'm using.

Thank you!
Marco
]]> marco1974 General Wed, 23 Sep 2015 16:18:04 -0400