Help Driving Stepper with Raw GCode

I'm attempting to get my Z-motor to run using raw Gcode commands in Pronterface. I'm using RAMPS 1.4 & Marlin v1. I've disabled thermistors and verified that endstops are happy. I have a test script I've downloaded to my board that runs the motor, so I know there's no hardware problem.

With Smoothie I was able to enable motors with one command and move with another like this:

M17
G0 Z50 F1000

But no sign of life. I hear no power. Do things work differently in RAMPS-world? Anyone know what I'm missing?

Thanks in advance.

Dan

What firmware is on the mega.ramps?

Same g-code should work on Marlin

Wouldn't the firmware on the Mega be the Marlin v1? Or are you referring to something else?

Looking at the code, my RAMPS gets to planner.cpp at line 712 (or therebouts). Looks like this.

int moves_queued=(block_buffer_head-block_buffer_tail + BLOCK_BUFFER_SIZE) & (BLOCK_BUFFER_SIZE - 1);

I'm getting moves_queued=0, but I suspect it should be >0. Does anyone know this code? I can't figure out how block_buffer_tail gets set.

Any help is appreciated.

The answer is that I had not set the motherboard type in the Configuration.h. This was not part of any of the tutorials that I went through.

// 33 = RAMPS 1.3 / 1.4 (Power outputs: Extruder, Fan, Bed)

#ifndef MOTHERBOARD
#define MOTHERBOARD 33
#endif