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Did you see that: https://github.com/MarlinFirmware/Marlin/pull/6021
To give a summary of his solution: It does not work as described, you have to use an ISP-programmer. You could use something like this...
Did you see this post? http://www.geeetech.com/forum/viewtopic.php?f=18&t=16692&sid=64c45995d11fcf61222342e66fb1aa08
The overall width in front (your second picture) is 53.9, the distance between front mounting holes is 50.2 on my printer. Maybe your X rods are...
Very good quality PLA from here (my favorite provider): https://www.dasfilament.de/filament-spulen-xxl/pla-1-75-mm/
Seems to be an oxymoron. :)
[ATTACH] And this is how it's supposed to look
[ATTACH] Here it is
Open in Repetier Host and you will see...
If I open your code in Repetier Host, I see two objects and the faulty movement too. Try to slice the attached cone. Change the extension to *.amf...
Mabe you bought some with sensor resistor 0.2ohm instead of 0,05, thus resulting in 1A max when put to 1.66V. So you will not harm the motors.
With damper (photo) screw inwards, without (drawing) outwards
I suggest to set Vref to 1.4V =~ 1A, thats how I run them. There is written somewhere not to exceed 1.2A. On some boards you can't trust that...
The file on SD is missing the start code for heating bed and extruder.
As the only useful mode in this case (with the Rumba) is 1/16 spreadcycle, it's best to omit pin CFG1 to CFG3 and solder a bridge from CFG1 to GND...
http://www.thingiverse.com/thing:889316
You might want to look at this: http://reprap.org/wiki/A4988_vs_DRV8825_Chinese_Stepper_Driver_Boards
I use them (not yet on the BB, because I'm lazy), and I do recommend them. I use them in spreadcycle mode with 16 steps (256 extrapolated). You...
These are highly recommended, very silent compared to A4988. German seller: http://www.watterott.com/de/SilentStepStick
http://reprap.org/mediawiki/images/2/24/RRD-RUMBA_SCHEMATICS.png HE2 can be switched to 12V (upper left), but the LM2596 (lower right) could...