Print without PC - No display on LCD

Hi all,

I have following config of my printer running Marlin_v1 :-

MEGA2560,
RAMPS1.4,
20x4 LCD,
SD card module.

I have connected the diode D1 on RAMPS to enable printing without PC, but I don't see any display on LCD when I disconnect the PC.

Anyone faced similar issue??

Need to enable it in the config.h

@ frosting, you mean the line#530 in Config.h??

Take out //
So it should be something like #define REPRAP_DISCOUNT_SMART_CONTROLLER.
I can't remember what line it is but you should see an area where it tells you about enabling lcds.
Not on a computer but I can see this evening.

everything you need to know about LCD screens and sd cards with marlin

check out this guys videos...

[www.youtube.com]

@frostin, No success even after I removed comment from the lines...below...


//LCD and SD support
//#define ULTRA_LCD //general LCD support, also 16x2
//#define DOGLCD // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
#define SDSUPPORT // Enable SD Card Support in Hardware Console
//#define SDSLOW // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
//#define SD_CHECK_AND_RETRY // Use CRC checks and retries on the SD communication
//#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
//#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking
//#define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
//#define ULTIPANEL //the UltiPanel as on Thingiverse
//#define LCD_FEEDBACK_FREQUENCY_HZ 1000 // this is the tone frequency the buzzer plays when on UI feedback. ie Screen Click
//#define LCD_FEEDBACK_FREQUENCY_DURATION_MS 100 // the duration the buzzer plays the UI feedback sound. ie Screen Click

any comments??

Do you have the 2 ribbon cables connected correctly to the ramps adapter?
What you have in bold is for the sd card (leave it like that for sd support). Enable the lcd itself.
// The RepRapDiscount Smart Controller (white PC
// [reprap.org]
#define REPRAP_DISCOUNT_SMART_CONTROLLER

Edited 2 time(s). Last edit at 12/05/2014 07:39PM by frostin.

Mine is a custom designed 20x4 LCD + SD card module.
LCD pins are connected to AUX2 as below:-

LCD pins------>AUX2 pins
1,3,5,16 ------>GND
4----------------->D63
6----------------->D65
2,15------------->+5v
11--------------->D59
12--------------->D64
13--------------->D44
14--------------->D66

I have enabled G3D panel in config.h

You'll need to match the pins accordingly in the firmware if #defining in config.h in the list doesn't work. That makes sense. Have you tried using a basic code (not marlin) to get it to work like "hello world" for example?
Here's a link if your pin out is the same:
[playground.arduino.cc]
Id try making sure the lcd itself is working by using simple code and the liquid crystal library.

Edited 1 time(s). Last edit at 12/06/2014 03:15AM by frostin.

LCD works when I connect it to USB on PC....but when USB is removed I see no display on LCD.

A trace is broken on the arduino. It happened to me too.

This happened for more than one RAMPS1.4 board....

trace cannot be broken for simultaneous two boards...

can you show me in some images...? if possible...

You could theoretically look for the open sides of the trace and solder a wire between them.

But I've also seen a lot of people that connected the cables the wrong way, however I think that has been addressed enough already.

---

http://www.marinusdebeer.nl/

See if this one helps.


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