E3d metal hotend needs excessive tempuratures for ABS? (Page 1 of 2)

Did you change the temp sensor in the firmware also?  Might just be showing incorrect temp?

line 15  #define SOLIDOODLE_VERSION 2  #define SOLIDOODLE_VERSION 3  only if you have an SD3 
line 91  #define TEMP_SENSOR_0 1  #define TEMP_SENSOR_0 6  since the E3D uses a different thermistor 
line 112  #define HEATER_0_MAXTEMP 225  #define HEATER_0_MAXTEMP 310  since you can get to higher temperatures

OK,  Thanks voids my idea...

Yes I did order from Filistruder. I sent them an email and received the following email

Unless its made from an entirely different material.. one of the only things I can suggest is that you have an airgap in your thermistor install, or you've got a fractional short (between the thermistor legs, or against the alu block itself).

I also am assuming you've re-run the PID Tuning and set the correct PID values into EEPROM (not that that should cause  this fault condition as reported, but hey, its worth confirming right? )....

At 300+, if it was actually 300+, the ABS would be coming out a burnt brown/black molten mess and pretty much free flowing out the nozzle while popping and hissing....
So this leads one to believe its not *really* 300, and instead is simply what your board is reporting.

So then we are left with - faulty thermistor (they are after all, essentially consumables in a 3D print environment), a small short (did you use coductive heatsink paste or something perhaps?) or some other reason for the change in potential for the *reading* of the thermistor such as a whacky connection on the board, or a bad joint in the cable loom...

But in short, I can't see how any fault *in the E3D itself* would produce this condition - only electrical and board side faults.
Use the thermistor supplied with the E3D, re attach it, update the firmware to be Thermistor type 1, and report back would be my suggestion. And make sure its in the small hollow depression - not in the big straight through hole section..

As a minimum, this will also allow sanjay to know you are using his supplied thermistor (no point asking him to trouble shoot someone elses supplied equipment) and therefore help isolate the problem further... BUT.... Sanjay I don't believe can help terribly much, as for this to be an E3D fault, then the metal itself would have to be 2-3 times thicker than it should be or something else completely left of field...or there would have to be a mysterious gap that has appeared between the thermistor and the meltzone to make the thermistor be 300 and the meltzone <260 (in order for the ABS to not be clearly over its safe operating temp)...

I also could be entirely mistaken *shrug*... its been a long day....

OK ill purchase a few thermistor. Which ones work with the marlin firmware

Yup! In a bag with ferrules. Very small, easy to miss.

Did you update the firmware?

What did you set the thermistor to?

Note - Latest thermistors from E3D now use Type 5 - if its a tiny thermistor and fits in the smallest hole, its type 5. If it only fits in the bigger hole then its type 2.

http://e3d-online.com/index.php?route=e … blog_id=19 says Type 5.

You could also read the configuration.h file:

// 1 is 100k thermistor - best choice for EPCOS 100k (4.7k pullup)
// 2 is 200k thermistor - ATC Semitec 204GT-2 (4.7k pullup)
// 3 is mendel-parts thermistor (4.7k pullup)
// 4 is 10k thermistor !! do not use it for a hotend. It gives bad resolution at high temp. !!
// 5 is 100K thermistor - ATC Semitec 104GT-2 (Used in ParCan) (4.7k pullup)
// 6 is 100k EPCOS - Not as accurate as table 1 (created using a fluke thermocouple) (4.7k pullup)

Type 6 (meh) and type 1 would be ok for the old EPCOS style. Not sure why adrian said Type 2, as E3D uses the 104GT-2 (I'm looking at a pack of 200 of them right now...)

Type 2 was a typo for type 1 in one place in that post And yes, type 6 is more than 'meh'...
So to restate to avoid any confusion, Type 1 should be used (type 6 should be entirely disregarded ) for any EPCOS NTC's with the usual beta values, and Type 5 for the new E3D's (anything V5 or later) with the Semitec thermistor.