Error Massage - MAXTEMP triggered

K8200 3D Printer K8200 - Issues while printing
1

Hallo

Ich have a big Problem with my Printer.
It just working fine for a while but know i allways get the massage !

[b]11:29:22.239 : Error:Temperature heated bed switched off. MAXTEMP triggered !!

11:31:30.509 : Error:Printer stopped due to errors. Fix the error and use M999 to restart!. (Temperature is reset. Set it before restarting)
11:31:30.509 : Resend: N18 M221 S100 *121[/b]

I replaced the NTC on the Heatbed because it was broken after i try to level the Board.
Now Repetier shows me some scary Temps.

Extruder: 214 C
HeatBed: 182 C

I have measured the Sensors and the Values looking just fine.

NTC on the HeadBed -> 105 Kohm
SensorExtruder -> 109 Kohm

Before i try to level the Heatbed the Printer works just fine.
I try to press the “Reset” Button , the one that is just beside the Conectors for the Sensors but it wont help at all.
I try to type M999 but nothing just the same Failure.

Please can someone help me amd sorry for my very bad english.

2

Where did you get the thermistor from?
If not from Velleman are you sure it’s the correct one for the printer?

3

Hallo

I get it from Reichelt , the same shop i buyed my Printer it was markt as K8200 sensor.

NTC100K-1206

And the ExtruderSensor is the same that was working fine before … but the Temp of the Extrder shows 214 all the way.

The Values just looking fine…
But it makes no diffrent if i plug in the Sensor or not , Repetier allways shows the same Temps , and reset the ControlerBoard or typing M999 dont make any diffrent.
I cant believe it im waiting for 14 Days to get the missing Parts and now this …

4

I know you have check but I will ask anyway.

Is the back of the control board touching the frame or some kid of short?

5

No Problem im glad you asking …

No it has no shorts …
But the Red and Green LED beside the USB-Jack is flashing

6

This is a long shot.

Check the output of the power supply (should be 15 volts)

You might try removing the driver and software and reload it and go through the setup again.
I’m thinking it maybe corrupted.

The only other thing I can think of is the board may have a problem.

I’m sorry but I’m out of ideas for now.

If I think of anything else I will post it.

7

[quote=“Sompero”]You might try removing the driver and software and reload it and go through the setup again.
I’m thinking it maybe corrupted.[/quote]

Are you talking about RepetierHost ?
Or the Software on the Board itself ? Is there a way to update the Firmeware maybe that can help ?

8

I was talking about the Repetier-Host and the drivers.

You can try reloading the firmware as well

9

It’s best that you try everything you can before sending the board back.
If you can fix it that will save a lot of waiting time and frustration.

10

Hallo

I just reinstall the Software and Drivers wont work.
I remove all the Plugs from the Board … wont work

Now i will try to reinstall the Firmware , can anyone give me a download link ?
Has anyone the schematic of the Board , i have all here to test it !

I think you are right !
I waited 14 Days for the missing parts , and now i have to wait again for the Board.
I have to send it to Velleman and then i get a new one. ?

11

Hi,

You can try this link for the firmware.
http://www.k8200.eu/support/downloads/

Instructions are in this link.
http://www.k8200.eu/manual/printing/?c=007

I have seen that they have another version out that no longer monitors the end stop switches.
You will need to search the forums board for that one.

12

I found this in another thread for the schematics.

Please note that diagrams are always subject to changes and updates.
http://www.velleman.eu/images/tmp/K8200diagram.jpg

13

Just got to thinking I didn’t try the link.
Well it don’t work.

You may have to ask the moderators if they can post the link again.
Sorry.

14

Hallo

So i try to update the Firmware but the failure is still there.
It looks like in the Schematic that the Sensors are running with a simple voltagedivider.
I will try now to test the circuit and try to feed the Atmega with the externen Voltage.
I dont think that the AD from the Atmega itself is broken i think it could be the caps C8 and C7.
We will see …

Many thx to " WrongWay " so far …
And Sorry for my bad english …

I will update this tomorrow !

PS:
Its a Board called 3Drag controller and i found the Schema here …
reprap.org/wiki/File:Schema_base.jpg

15

Hallo

A new Day … I try everything again but nothing helps.
Anyone has some more Tips for me ?

16

Hi Sompero,

are you familiar with the Arduino software or, more important, with the way the configuration is handled inside the Marlin firmware?

If yes, you could test how the board will behave if you switch the pin allocation e.g. for the bed and extruder therms. Depending on whether the temperatures shown in Repetier change accordingly or not, this would give you a hint on whether it’s rather the hard- or the software which is faulty. Also, you could try loading one of the newer versions of the firmware (or both) for comparison: the “V2” from Velleman or the most recent from Github. For the latter you have to check the main configuration first and set the basics or you won’t be able to connect to your board with RH.

Cheers,
kuraasu

17

Hallo Kuraasu

Thx for the Tip !

I found out that the AD-Pins which belongs to the Sensors are PK5 and PK6.
This two pins running under AnalogInput 13 and 14.

This Pins getting defined in the File Pins.h
Here a Sample …

#define TEMP_0_PIN 13 // ANALOG NUMBERING
#define TEMP_1_PIN 15 // ANALOG NUMBERING
#define TEMP_2_PIN -1 // ANALOG NUMBERING
#define HEATER_BED_PIN 9 // BED
#define TEMP_BED_PIN 10 // ANALOG NUMBERING

I switch 14 with 10 and now both Sensor showing the same value of 221,9 C
I will try to search for a free Pin to switch both sensors on diffrents ports than the K-Port.
I still think it could be the Caps in the Voltagedivider Circuit.

18

So i have taken an SMD Measuring Tool from a Friend of mine.
I was not sure if i have the right conection with my normal Multimeter , but know i see that the 2 SMD Resistors have only 85 Ohm ?
How can this happen ? It was working very well till the NTC was broken

19

Not sure how that would happen.
Before you change anything on the board you should send it back to Velleman to protect the warranty

20

Hi Sompero,

you changed the bed thermistor allocation to ADC10 / PK2, but PK2 is not among the pins which are routed to the spare connector space. So, I guess you did not actually connect the thermistor to PK2, right?

As for the measured values of the components, I wouldn’t trust a measurement done while it is connected. Still, 85R vs. 4k7 (assuming you ment R7/R8) is a rather big difference.

Cheers,
kuraasu