E3D v6 Clicking

Sounds like a connection issue with the heater and the hot end is cooling.

PLA? Direct drive? 2mm is too much if the answer to both questions is yes.

I'm having the same issue with PLA.  It's getting quite frustrating as thats why I bought the E3d

I have tried printing at the following temps: 190, 210, 220, 230 (Filament supplier recommends this temp), and I am not trying 250 as the suggestion of a user over at Voltivo.

The 12v fan has its own dedicated 12v supply (also used to power a layer fan, in parallel not series).
The PTFE liner is fully seated, and I even made sure to pull up the retaining ring so there is no room for wiggle.
I was originally using 2mm retraction as that was the default on my slicer, and have been using it with ABS without issue, I have since changed this to 0.5mm at the above temps.

As for the thermistor, I am using table 5 in rep.92. This is the same table used for the stock extruder. There are conflicting reports on what table should be used, due to the additional resistors on the main board.

I have noticed that the jam usually occurs after a layer change, so I am thinking it has to do with retraction and the filament being soft enough to stick in the heat break.
I am currently printing at 30mm/s. Which is slower than I was printing with ABS (60mm/s).
I will update when my 250c print is done.

I am printing the 3dHubs Marvin at 200% scale (8x volume of the original size) as my wife wanted one for her desk, I have gotten it to print as far as the small ring on top, at which point it jams a few layers up past the top of the head.

I have also disabled small parameter slow down as I am using a layer fan and this part of the model prints slow compared to the rest of it with this setting in the slicer enabled.

Hi All, I did a full print with no clicks by printing at 250C.

The issue seems to be the thermistor table being incorrect for the E3D. Looks like I will be dialing in the temp for any filaments I use, but at least I know it needs to be higher.

I'm not sure that table 5 is correct. What makes you think it is?

Incorrect, PID autotune will not help in this case. PID autotune cannot correct for thermistor tables.

Also incorrect. According to:

http://voltivo.com/forum/davinci-firmwa … ruder#3631

R1 is in parallel with the thermistor, and has a value of 1k according to that link. The resistance of a 104GT-2 at say, 200C is 48ohms.

But with R1 in parallel, that's 45ohms total. 45 ohms is a hotter temperature than 48 ohms (about 207C), so the DaVinci will read hotter than actual.

Thermistor table 8 in Repetier will get you close - as noted above you'll be off by around 7 degrees in the range of temperatures 3D printers operate at. Thermistor table 5 is likely way off.

"Measure at 300k" is incorrect. That would require a resistor in series with the thermistor, which is not the case. Please avoid spreading incorrect information.

After some additional testing, and thoughts. I found that this looks to be a combination of my tempos being a bit too low, and lack of airflow for the E3dv6's cooling fan.  The lower half of the fan is pretty much blocked by the stock carriage.

I removed the carriage and dremmeled out a section so the entire fan is exposed.

I also found that i have to up my temp from the filaments recommended 230 to 235 to prevent any jams. This is better than the 250 I was printing at.

If your enclosure is hot, that'd be a problem.

PLA requires cool air through the fins. PLA does not require a heated enclosure to avoid warp.
ABS is less sensitive to cool air through the fins, but does require a heated enclosure.

Print with the door open and possibly a gentle fan to bring the enclosure temperature down, see if that solves it. If it does, you'll need to either print with an ambient temperature enclosure, or seriously step up the fan power.

Again, as explained above, Table 8 will be the most accurate at printing temperatures. It will be very inaccurate at ambient temperatures. If you want to use table 5 that's fine, but your temperatures are even more incorrect at printing temps.

It was a typo, now corrected.