Build Your Own SLA/SLS

Hi everyone! First of all I'd like to say that this forum is awesome and you guys seem to know what you are doing. Well I cannot say the same about myself so...

I have arduiuno mega + ramps 1.4 and A4988 + nema 17 motor. I've tried everything and I cannot understand why I'm stuck in something so basic. I cannot move this motor at all. I've tried marlin and pronter and I managed to connect, but I cannot move anything. The same with CW. How can I run some easy diagnostics to check what's wrong? I'm not even sure which part is failing.

Please help

Hi,

I've got a similar setup and I'm also using Marlin. I had to disable the software endstops and disable all the temperature sensors in the configuration.h to make it work.

Hope that helps

Thanks a lot! But I cannot properly disable endstops. Could you send me your configuration.h file?

Of course. PM me your email.

Well, I used your config and all I got is this (which looks normal to me):

start
echo: External Reset
Marlinv1.0.2
echo: Last Updated: Feb 6 2015 00:32:31 | Author: (none, default config)
Compiled: Feb 6 2015
echo: Free Memory: 5093 PlannerBufferBytes: 1232
echo:Hardcoded Default Settings Loaded
echo:Steps per unit:
echo: M92 X78.74 Y78.74 Z800.00 E836.00
echo:Maximum feedrates (mm/s):
echo: M203 X500.00 Y500.00 Z5.00 E25.00
echo:Maximum Acceleration (mm/s2):
echo: M201 X9000 Y9000 Z600 E10000
echo:Acceleration: S=acceleration, T=retract acceleration
echo: M204 S3000.00 T3000.00
echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s), Z=maximum Z jerk (mm/s), E=maximum E jerk (mm/s)
echo: M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00
echo:Home offset (mm):
echo: M206 X0.00 Y0.00 Z0.00
echo:PID settings:
echo: M301 P22.20 I1.08 D114.00
echo:Filament settings: Disabled
echo:Z-Probe Offset (mm):
echo: M851 Z0.00

Still I cannot move my motor, could anyone tell me if any LEDs should be on or blinking? I really have no idea how to diagnose what is wrong

Simple diagnostics I did an understood:
Tried rotating the motor with LED plugged to one of the coils and it was flashing (so I guest that the motor is working)
Arduino Mega and RAMPS seem to communicate normally with pc,

Just to be sure, do you have an external power supply (12v) attached to your ramps? Also, have you tried the ramps test code http://reprap.org/wiki/RAMPS_1.4#RAMPS_1.4_test_code?

I have the power supply it is 5A 12V notebook like power supply, so I guess it should work. I haven't used this ramps check, I'll do it as soon as I get home

EDIT:
Ok, I've checked, and everything moves as it should so I guest I have to work a bit more with firmware and soft