Geeetech

Hi guys,

I 'm trying to use a gt2560 without marlin, i have only 3 stepper motors which i want to control with the gt2560, no endstops or extruders.

Can i use the pin layout of the Ramps 1.4 for that?? http://reprap.org/wiki/RAMPS_1.4#Firmwa ... ssignments

To which pins are the X Y Z ramps connected?

thanks!

Erik

E_rik wrote:Hi guys,

I 'm trying to use a gt2560 without marlin, i have only 3 stepper motors which i want to control with the gt2560, no endstops or extruders.

Can i use the pin layout of the Ramps 1.4 for that?? http://reprap.org/wiki/RAMPS_1.4#Firmwa ... ssignments

To which pins are the X Y Z ramps connected?

thanks!

Erik

Hi,
You can refer to the pin assignment for GT2560:

Thanks but i can't open that file properly. It opens in Notebook and all the text is one big mess.

Do you have a better version of it or know a program to open it?

E_rik wrote:Thanks but i can't open that file properly. It opens in Notebook and all the text is one big mess.

Do you have a better version of it or know a program to open it?

Hi，
You can find the "pins.h" in your own Marlin firmware and then open it in your notebook,which may work:

I can open the pins.h but i don't see the gt2560 board on the list, i searched for half an hour.

Is it the same pinmap as this 2560 board? This is a nice pin layout.

E_rik wrote:I can open the pins.h but i don't see the gt2560 board on the list, i searched for half an hour.

Is it the same pinmap as this 2560 board? This is a nice pin layout.

OK,i actully mean you can make a compare to the pins in "pins.h" of our GT2560 with your pin layout of the Ramps 1.4,and make a reference to the diference.
Here you can download a firmware for GT2560 board if you didn't have one:
http://www.geeetech.com/forum/viewtopic ... 20&t=17046

Sorry i forgot to post the pinout:

https://www.arduino.cc/en/Hacking/PinMapping2560

Is there a pinout like this from the gt2560 somewhere?

I would like to use it as an arduino with extra options for steppermotors, that's why i bought this board.

E_rik wrote:Sorry i forgot to post the pinout:

https://www.arduino.cc/en/Hacking/PinMapping2560

Is there a pinout like this from the gt2560 somewhere?

I would like to use it as an arduino with extra options for steppermotors, that's why i bought this board.

Sorry，i have no idea what you exactly mean?The pinout you posted is the same as the pinout of GT2560,cuz the chip of GT2560 is Atmega2560.

Do you have a diagram mapping the A4988 pins to the Atmega 2560 pins?

Right now i have only a battery 18V 3A and 1 stepper motor connected to the board. If i run a testprogram there are 3 red led's which flash during the program, the motor is not moving.

// Bounce.pde
// -*- mode: C++ -*-
//
// Make a single stepper bounce from one limit to another
//
// Copyright (C) 2012 Mike McCauley
// $Id: Random.pde,v 1.1 2011/01/05 01:51:01 mikem Exp mikem $

#include <AccelStepper.h>

// Define a stepper and the pins it will use
AccelStepper stepper; // Defaults to AccelStepper::FULL4WIRE (4 pins) on 2, 3, 4, 5
AccelStepper MyStepperX(AccelStepper::DRIVER, 54, 55);

void setup()
{ MyStepperX.setEnablePin(38);

// Change these to suit your stepper if you want
stepper.setMaxSpeed(100);
stepper.setAcceleration(20);
stepper.moveTo(500);
}

void loop()
{
// If at the end of travel go to the other end
if (stepper.distanceToGo() == 0)
stepper.moveTo(-stepper.currentPosition());

stepper.run();
}

This is the program that i run, do you think the motor on x-axis should move now? I measure 18V on the x-axis connector and also the ramps get warm but the motor won't run.

Here is the diagram: