1 Topic by dustylavender

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Topic: Heater decoupled error at 150ºC

I started getting the heater decoupled error after cleaning my nozzle in acetone.

Figured out that power wasn't going to the core (bad connection somewhere along the line) so I had to rewire that directly to the 12v output on the board. Still didn't work (got decoupled error in 2 minutes with no heat), so then I've replaced the entire nozzle/heater core/thermistor. Now the printer will heat up to 150ºC and then give me the error.

It seemed to take just as long to get to 150ºC as it used to take to get to 230ºC, do I need to change any settings in repetier after installing a new (non-stock) thermistor? Or does it look like my printer might just be dying an uneventful death?

Thanks

2 Reply by carl_m1968 (edited by carl_m1968 2016-02-17 18:59:29)

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Re: Heater decoupled error at 150ºC

So a couple of questions. The new heater is 12 or 24 volt? What sensor in Repetier is being used for temp sensor 0? Should be set to 5. The decoupled error means it is not reaching the expected temp in the expected time. That time is usually about 15 minutes.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

3 Reply by dustylavender

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Re: Heater decoupled error at 150ºC

It should be 12V 40W. I tried a different heater core before replacing the whole hotend. This is the exact hotend that I purchased. http://www.amazon.com/gp/product/B015W1 … ge_o00_s01

It is set to 5, but I tested the thermistor's resistance and it is 100k, so I'm pretty sure repetier needs to be changed.

When I changed repetier to use a 100k resistor, temp reads "def".

It gives heater decoupled error around 10-15 minutes.

4 Reply by carl_m1968

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Re: Heater decoupled error at 150ºC

dustylavender wrote:

It should be 12V 40W. I tried a different heater core before replacing the whole hotend. This is the exact hotend that I purchased. http://www.amazon.com/gp/product/B015W1 … ge_o00_s01

It is set to 5, but I tested the thermistor's resistance and it is 100k, so I'm pretty sure repetier needs to be changed.

When I changed repetier to use a 100k resistor, temp reads "def".

It gives heater decoupled error around 10-15 minutes.


The issue is that a Da Vinci has a tuning resistor on its main board that is in parallel with the thermistor so the Da Vinci does not see it as a 100k thermistor. This is why you need to use 5 instead of 1 in Repetier.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

5 Reply by carl_m1968

  • carl_m1968
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Re: Heater decoupled error at 150ºC

dustylavender wrote:

It should be 12V 40W. I tried a different heater core before replacing the whole hotend. This is the exact hotend that I purchased. http://www.amazon.com/gp/product/B015W1 … ge_o00_s01

It is set to 5, but I tested the thermistor's resistance and it is 100k, so I'm pretty sure repetier needs to be changed.

When I changed repetier to use a 100k resistor, temp reads "def".

It gives heater decoupled error around 10-15 minutes.


The issue is that a Da Vinci has a tuning resistor on its main board that is in parallel with the thermistor so the Da Vinci does not see it as a 100k thermistor. This is why you need to use 5 instead of 1 in Repetier.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

6 Reply by dustylavender

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Re: Heater decoupled error at 150ºC

That is the setting I've been using, but it still decouples around 140ºC with this error,

< 12:42:24 PM: Error:One heater seems decoupled from thermistor - disabling all for safety!
< 12:42:24 PM: Error:Temp. raised to slow. Rise = 0.56 after 31233 ms

Temperatures on the bed and extruder seem to be pretty accurate at room temp.

Is this an issue more serious than the thermistor? I'm considering buying the $100 replacement head from davinci rather than going out and buying a new printer (not a davinci). But, I'd hate to drop that money into it, if the problem is something larger.