Hi, I had a problem in printing G-code file which is generated from skeinforge, the problems is my mendel z-axis seem dont lift-up after finish laying each layer. (I tried put my hand on a threaded rod, in fact it just lift-up very little, not enough space to lay another layer on top.) I'm not sure is't may be a wrong setting of configuration.h" at Five_GCode_interpreter. #ifdef MENDEL // define the XYZ parameters of Mendel #define X_STEPS_PER_MM 10.047 #define X_STEPS_PER_INCH (X_STEPS_PER_MM*INCHES_TO_MM) // *RO #define INVERT_X_DIR 0 #define Y_STEPS_PER_MM 10.047 #define Y_STEPS_PER_INCH (Y_STEPS_PER_MM*INCHES_TO_MM) // *RO #define INVERT_Y_DIR 0 #define Z_STEPS_PER_MM 833.398 #define Z_STEPS_PER_INCH (Z_STEPS_PER_MM*INCHES_TO_MM) // *RO #define INVERT_Z_DIR 0 here is some my setting for printing 1.) Using Reprpa-Host software 2.) Skeinforge layer thickness(mm) = 0.4 (no raft) 3.) My z-threadrod is 1.25mm pitch and stepper motor 1.8 deg I've no idea is't a firmware problem or my skeinforge wrong setting cause. Just added two pic. which is i've printed "x-bar-clamp-m4_4off" the correct object height should be 10~11mm but i got printed out just only 4.43mm. https://reprap.org/forum/read.php?1,52526,52526#msg-52526 Wed, 22 Jul 2026 12:54:19 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,52526,52569#msg-52569 https://reprap.org/forum/read.php?1,52526,52569#msg-52569
Thanks a lot !!!!]]> tv7957ht General Thu, 22 Jul 2010 15:54:27 -0400 https://reprap.org/forum/read.php?1,52526,52547#msg-52547 https://reprap.org/forum/read.php?1,52526,52547#msg-52547
Z is geared down by 8/21, so with half stepping you have 400 * 21 / (8 * 1.25) = 840. Looks like the figures are for non-metric belt.

I think the most likely reason you are so far out, assuming you don't have micro stepping drives, is that z is trying to step too fast and is skipping.]]> nophead General Thu, 22 Jul 2010 14:06:19 -0400 https://reprap.org/forum/read.php?1,52526,52542#msg-52542 https://reprap.org/forum/read.php?1,52526,52542#msg-52542
If the numbers are correct, you want to adjust the Z_STEPS_PER_MM value. In full step mode you have 200 steps / 1.25 mm = 160 Z_STEPS_PER_MM. In half step mode, it's double the value, or 320. This doesn't take gearing into account and assumes one turn of the motor == on turn of the rod.]]> Traumflug General Thu, 22 Jul 2010 13:48:08 -0400 https://reprap.org/forum/read.php?1,52526,52526#msg-52526 https://reprap.org/forum/read.php?1,52526,52526#msg-52526
I'm not sure is't may be a wrong setting of configuration.h" at Five_GCode_interpreter.

#ifdef MENDEL

// define the XYZ parameters of Mendel

#define X_STEPS_PER_MM 10.047
#define X_STEPS_PER_INCH (X_STEPS_PER_MM*INCHES_TO_MM) // *RO
#define INVERT_X_DIR 0

#define Y_STEPS_PER_MM 10.047
#define Y_STEPS_PER_INCH (Y_STEPS_PER_MM*INCHES_TO_MM) // *RO
#define INVERT_Y_DIR 0

#define Z_STEPS_PER_MM 833.398
#define Z_STEPS_PER_INCH (Z_STEPS_PER_MM*INCHES_TO_MM) // *RO
#define INVERT_Z_DIR 0

here is some my setting for printing

1.) Using Reprpa-Host software
2.) Skeinforge layer thickness(mm) = 0.4 (no raft)
3.) My z-threadrod is 1.25mm pitch and stepper motor 1.8 deg

I've no idea is't a firmware problem or my skeinforge wrong setting cause.

Just added two pic. which is i've printed "x-bar-clamp-m4_4off" the correct object height should be 10~11mm but i got printed out just only 4.43mm.]]> tv7957ht General Thu, 22 Jul 2010 12:28:27 -0400