OK... Weird problems again...

3D Printing
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1

OK… Weird problems again… I have replaced all of my electronics, except the X, Y, and Z drivers (Next step, I guess). But here is what is happening now.

The print starts normally, autolevel, pre-extrude, loops around print and then, sometime after the 1st layer, my printer resets.

Any ideas???

2

Well, I have replaced everything but the LCD… Looks like I got the the 4th or 5th layer - started infilling @35%, then it reset. Everything stopped and then the display resets, temps to 0… I have no clue where to go from here, unless my power supply is shoddy… which is possible.

3

I’d say check your power supply

4

Most likely the power supply is overheating and shutting off, or it is bad. If you have a multimeter, measure the power supply while it is running.

5

Tried both USB and SDCard. Same results.

6

@Stephanie_A the power supply is rock stable on the bench. But I am not putting much of a load on it.

7

I ran the code in repetier, slice by slice and no anomalies. I agree that I will only see it under load.

8

I think also most possible fault would be the power source. If you can solder try to replace the condensators in it first

9

Cooling fans on electronics can do wonders! But I think its the PS.

10

I think, power supply or arduino intergrated current controller (+5v or +3v) overheated. If You make it with display+optical endstops+more device on +5V from Arduino, maybe is the current controller IC overloaded. China clones of Arduino have a weak supply controller IC’s. Also possible: schort circuit on hotend heater if hot.

11

I have a set of fans I added over the ramps board. I have it under load now and have meter hooked up to it. So far it never drops below 12.59. It starts at 12.6vdc and when everything is on and printing, it never goes below the 12.59vdc… And I ordered a SainSmart 2560, specifically because it was well regarded from a US shipper…

12

@Keith_Applegarth Check the +5V and +3V voltage. If supply controller IC on Arduino is overloaded, it can going down despite active cooling. SainSmart is produced in China. Trust me.

13

For example, by mine electronic set (Arduino Due+Ramps-FD+optical endstops+Full Graphic Smart Controller+EEPROM) I should to use a external +5V power supply. The internal supply controller of Arduino was permanently insufficient.

14

I was watching this time… it did not reboot, but the Z, X, and Y started drifting, with the hotend almost into the bed.

15

have You checked the +5V and +3,3V?

16

@Maxim_Melcher where do you hookup the external 5v power supply?

17

@Keith_Applegarth easy: cut/bend all pins +5v from RAMPS to Arduino, and connect external +5V to this pins on RAMPS.

18

this is enough: http://m.lightinthebox.com/de/dc-3-40v-dc-1-5-35v-spannung-step-down-transformer-module_p421830.html?currency=EUR&litb_from=paid_adwords_shopping&litb_from=&adword_mt=&adword_ct=63507276975&adword_kw=&adword_pos=1o1&adword_pl=&adword_net=g&adword_tar=&adw_src_id=6531620473_275529255_19990824495_kwd-115981534095&gclid=CjwKEAjwi4yuBRDX_vq07YyF7l8SJAAhm0rpjaHJ0YzwWmXmHQG3v1ZLG-jAiV7gicEZ19YCELFjrBoCslfw_wcB

19

Don’t do what @Maxim_Melcher said: Do NOT cut any pins or bend them. Just read the manual :wink: You need to desolder or cut out the diode D1, no more no less. Then just hug the Arduino to any common USB-Charger.
Read on at: http://reprap.org/wiki/RAMPS_1.4#D1.2C_D2_-_Diodes

Its just for testing. If you find out that this is the solution, the DC/DC Converter on the Arduino Mega can be changed easily and cheap (it costs about 1,50€).

20

@Rene_Jurack No! Wrong! YOU should read the manual! RAMPS elements are connected over several pins to current controller IC in Arduino! RAMPS need +5v, but in this situation not from Arduino. If You connect external supply to RAMPS without cut/bend pins, the internal controller on Arduino can be damaged!