ISSUE: Stepper motors are not working when connected with RAMPS 1.4.
OBSERVATION: The LED lights(LED 2,3,4) in the RAMPS 1.4 is not powering up.
PRACTICES: I use Arduino Mega 2560 and installed Marlin firmware in it. And I bought a RAMPS 1.4 in a local electronic dealer. I placed the RAMPS over Arduino Mega 2560. For testing I just connected 2 NEMA 17 stepper motors with RAMPS. When USB port connection is given from laptop to Arduino board, a LED light is ON in Arduino board (L) and in RAMPS (LED 1). I use SMPS 12 V 20 A as a PSU for RAMPS. But in RAMPS the LED 2, 3, 4 are not switched ON. I checked the input voltage to the RAMPS using micrometer and it shows 11.75 V. But there is no output from the RAMPS.
Also I installed and tried Repetier firmware and Grbl but it doesn't work. And I use Windows 10 pro 64 bit OS.
When I flashed Arduino with Grbl, in this case all of the LEDs on the Arduino and RAMPS 1.4 are switched ON. I use Candle GRBL software to test the stepper motors.
And I replaced and tested with another RAMPS which is bought from Amazon but the problem remains unchanged.
Kindly give some suggestions at the earliest.
I have attached the images of my circuit connection:
Board selection in Marlin:
#define MOTHERBOARD BOARD_RAMPS_14_EFB
In response to Professor's questions:
- Yes the stepper drivers are connected correctly
- Yes the stepper wiring is accurate (2B 2A 1A 1B) as per mentioned in the Ramps 1.4.
- No there is no voltage input to stepper motor. But there is 12V input to Ramps 1.4.
- Disabled cold extrusion
- No, the firmware is not set to no move before homing (issue G28 first)
- Yes, pins are set correctly for your board in Marlin