Printer stopped working

K8200 3D Printer K8200 - Wiring and electronics
1

Hello,

so like i said the printer stopped working at sudden. I was printing a thing and everything gone well, then i was going to print another print, and the problems started.

First thing i noticed is that the temperatures wont reach the selected values. The bed temperature is acting strange, the bed heather was always on bad the bed wont reach the temperature, that prematurely was always reached (55C).

Motors on manual wont work. The command is sent but the motors are dead.

The fan on manual is working. I can also turn heaters on and off.

So when I start something for print it say printing but nothing happens.

Is there a way to reset the board or something i can test.

2

Check the voltage from the power supply at the blue connector
Should be 15 volts

3

Update…

The voltage is ok, 15V.

So I reflashed the firmware, and the only problem remains is that the extruder temperature wont reach the selected temperature. Every thing else work (all axes, fan, heaters,… its all works in manualy). So if i select 210C it reaches 205C, if I choose 200C its reaches 195C and so on. Always stops heating 5C before it reaches the desired temperature. So it seems that the board stops the extruder heater before it reaches the selected temperature. I cant figure why.

So when the bed temperature is reached, then the extruder moves in the home position and then the printer waits for the extruder to reach the temperature but its never reached because of the problem described before.

For me its seem like a settings problem, the same thing happens in Cura 3D and also in Repetier.

Youtube video of the problem:
youtu.be/nqhdLLgbcHE

4

Could you post a video of the temp graph?
Also what happens if you set the temp up in the manual control?

5

Which arduino version did you use to compile the firmware?

I found it only compiles working correctly with arduino 1.0.6

6

I compiled it with Arduino 1.06.

The temp. graph:

drive.google.com/open?id=0BxsE_ … authuser=0

The strange thing is there are no bed output, but the bed is heating whit no problems.

Another thing is I need always reset the board with the reset button, to connect with Repetier. Without reset its connects but it wont work.

7

[quote=“fharcet”]I compiled it with Arduino 1.06.

The temp. graph:

drive.google.com/open?id=0BxsE_ … authuser=0

The strange thing is there are no bed output, but the bed is heating whit no problems.

Another thing is I need always reset the board with the reset button, to connect with Repetier. Without reset its connects but it wont work.[/quote]

Sorry, but your picture link is not public.

Bed output will be shown only in PWM mode.
Normally marlin uses bang/bang mode for the heatbed.

Check your printer settings in repetier.

Is baudrate set to 250000,
reset on connect DISABLED
and connection type set to SERIAL CONNECTION?

8

Sorry, I made the link public.

drive.google.com/file/d/0BxsE_I … sp=sharing

9

Have you ever tried PID autotune for your hotend?

10

This is very strange.

You should try what Ichbinsnur suggested.

I have also heard that Internet Explorer sometimes has an issue when downloading the firmware you might try another web browser.

You night try reloading the EEPROM values as well.

11

[quote=“Wrong Way”]
I have also heard that Internet Explorer sometimes has an issue when downloading the firmware you might try another web browser.[/quote]

That’s why i only use Firefox :wink:

[quote=“Wrong Way”]
You night try reloading the EEPROM values as well.[/quote]

Good point Wrong Way!
After a firmware reflash that is absolutely necessary!

12

Hey thank you very much guys, especially “ichbinsnur”, my printer started working again after PID autotune.

I used the tutorial in the link below if someone else will need:

wiki.solidoodle.com/pid-autotune … luctuation

So now I will test my printer some more and see if i need to switch reset it every time i restart Repetier.

About the EEPROM values, how and where i get them. If i look at the EEPROM setup there are already entered. Are they wrong?

And why in the start the pid has gone out of sync and broke my printer?

13

In the firmware settings of repetier just press reload default values.
This will load the eeprom settings from the new compiled firmware.
After thst save them to eeprom and you will be fine.

The temp behavior may be caused by a slightly unstable hotend thermistor.

Nice to hear you can print again!