Jam or clog in DyzEnd-X Hotend

[John Soler]

Could I please get assistance with an issue.
I just finished installing and setting up my DyzExtruder-GT and DyzEnd-X with a .4mm nozzle.
On my first test print the filament stopped feeding about the 6th layer,  the extruder seemed to be pushing but it did not feed thru.
I removed the filament ( I have attached a picture of the filament condition once I removed it), cut of the end and inserted more filament. And tried to print again, This time about the 3rd layer it stopped feeding again.
I again removed the filament, and this time tried to push the filament thru by hand ( the nozzle was at 215c. and it would not push thru.
I removed the End from the extruder and removed the nozzle. While the nozzle was still hot I was able to push filament thru the nozzle easily. But If I tried to push filament thru the DyzEnd-X it would not feed.
It seems to be getting jammed in the transition tube. If I insert the filament by hand into the DyzeEnd-X it will enter the transition tube about 7.46mm before it hits a some type of clog.

I was using HELLO3D Glow in The Dark PLA Filament, Orange Luminous Filament 1.75mm.

Any help with would be greatly appreciated.

[John Soler]

After trying to solve the issue more. I realized that the problem is for some reason the filament is cooling in the transition tube and becoming to cold for the extruder to push it thru. which then clogs.

What could be causing this issue?

Currently when the fan turns on when the the hotend is heated. Which I assume is what it is suppose to do.

Is there a curve or certain temps where the fan is suppose to turn on and off?

[John Soler]

I made a mistake. 
The filament is cooling in the HEAT BRAKE not the transition tube. 

[Technical Support]

Hello John,

We answered you in your ticket support but this thread has more messages and details from you so the answer will change.

From your photo it seems that there are remnants from a previous black material maybe causing the clog or is it the material itself that turned black ?

The fan on the heatsink is indeed supposed to run constantly at full speed as soon as the hotend is heating.

The clog could be from a temperature too high and heat creeping up the heatbreak and making the filament too soft to have enough force to push material but as you seem to think the opposite phenomenon is happening I would suggest trying to increment the printing temp by +10C several times to see if the problem persists.

PLA usually prints from 190C to 210C so I find it strange, if upping the temp doesn't work also try lowering by increments of -10C too to see if it could be heat creep instead.

During printing is the heater temp stable ?

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[John Soler]

I have had bunch of issues with this hotend becoming clogged. The material does not turn black. when I disassemble it. It pull the filament out it is fine.
Today, it stopped printing and clogged again.
Now the temp sensor isn't working.

I am not sure if the issue is the temp sensor or the thermistor. Which causing the filament to cool and that is what is causing the clogs.

[Technical Support]

Hello John,

If your temperature sensor isn't working anymore, it sounds like it was probably being faulty and had inaccurate readings that would cause the clog problem. Maybe it was reading higher than what was actually the temp and the material was too cold to extrude.

The thermistor is the temp sensor, maybe you meant the heater cartridge ? In any case it would probably be more a temp sensor problem than a heater one given your issue.

You should check the integrity of the cables of the temp sensor at both ends on the hotend and on the electronics board, as well as the entire length of the cable, it sounds like one of the cables is broken or damaged. Check that when the carriage is moving it is not bending those cables too much, especially on the hotend, that could be the cause of the damage. If so it would have to be replaced.