Differences

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--- tevo_tarantula_i3_3d_printer [09.12.2018 17:11] – [Settings] Pascal Suter
+++ tevo_tarantula_i3_3d_printer [16.02.2020 23:14] – [Dead Stepper driver - workaround] Pascal Suter
@@ Line 103: / Line 103: @@
 In order to adjust the Z axis, i first sent G28 to auto home all axis, then G29 to autolevel the bed, i then used ''G1 Z0'' to move the Z axis to the 0 position. I put a sheet of paper under the Nozzle and set my first guess what the offset could be. it's better if you set your offset too little so that your extruder won't crash into the printbed
-  M851 Z-0.6
+  M851 Z-0.8
 Now run ''G28'' agin and go again to ''G0 Z0''. Repeat this process until the nozzle makes contact with the paper so that the paper can still slide in and out from underneath the nozzle, then increase the offset by another -0.1mm
@@ Line 119: / Line 119: @@
 ===== Slicer Software and Settings =====
-Whatever software you are using, make sure that the Start GCode contains G28 and G29 for auto hight and auto bed leveling.
+Whatever software you are using, make sure that the Start GCode contains G28 and G29 for auto height and auto bed leveling.
+for more detailed settings see [[How I 3d Print - Slicer settings]]
+===== Dead Stepper driver - workaround =====
+i recently printed a quite tall structure over night. it tunred out, that the screws of the z-axis wheels did not clear the mounting bracket for the extruder. as a result of the z-axis missed most of its steps during several hours and was jammend.
+sadly it turned out that after this the Z-axis stepper driver was broken. when i moved the z-axis the stepper would randomly move forward or backward or just humm. i've tried to adjust the potentiometer but with no luck.
+as a workaround i changed the marlin config, so that it's now using the E1 (second extruder, which i don't have) stepper driver in place of the z-axis. i could simply move the molex connector over from Z to E1 and continue to print.
+to implement the workaround, i had to start my Arduino IDE, open the Marlin project and edit the ''pins_RAMPS.h'' file. i searched for the Z- and E1 axis and swapped the values for the pins, they now look like this:
+<code>
+#define Z_STEP_PIN         36
+#define Z_DIR_PIN          34
+#define Z_ENABLE_PIN       30
+#ifndef Z_CS_PIN
+  #define Z_CS_PIN         44
+#endif
+#define E1_STEP_PIN        46
+#define E1_DIR_PIN         48
+#define E1_ENABLE_PIN      62
+#ifndef E1_CS_PIN
+  #define E1_CS_PIN        40
+#endif
+</code>
+i then re-compiled and uploaded the firmware and could print right away.
+of course i've also trimmed the bracket :)