E3D V6 with External Thermocoupler

[Noob]

Is anyone using the external thermocoupler on Rostock Max V2 with the E3D V6 Hotend to achieve higher temps? If so, would you be willing to share wiring diagrams on the Rambo, and any calibration/setting tips? Especially for use with PC prints?

THANK YOU!!!

[teoman]

Never heard of that before.

Images links?

[Mac The Knife]

Is anyone using the external thermocoupler on Rostock Max V2 with the E3D V6 Hotend to achieve higher temps? If so, would you be willing to share wiring diagrams on the Rambo, and any calibration/setting tips? Especially for use with PC prints?

THANK YOU!!!

What temperature are you able to reach now, and what temperature are you shooting for?

[Nylocke]

E3d sells this http://e3d-online.com/Electrical/Compon ... Board-v1.0 and a K type thermocouple to go with it. This is what he's talking about. Thermocouples don't need calibration from what I know, but there is a tiny bit more setup for use. You need to connect the board directly to: an analog pin, a +5V pin, and a GND pin.

Looking here http://reprap.org/mediawiki/images/7/75 ... ematic.png there is an analog extension header with all of these things, but you have to solder the header on yourself. Then you'll need to chose which analog pin you want to go with (any should do, pins 2-6 on the header, but pin 2 is used for thermistor 3, so make sure you don't have something plugged in there). When you get that done, you'll have to change your firmware in the Pins.h section for the temp sensor pin to the one you chose, and you'll have to change the config.h to match the changes to the temp sensor. If you have your thermocouple properly secured you should now be able to use it.

PC tends to have some issues with layer bonding if you aren't printing hot enough from what I've heard. You might have your thermistor set up wrong. Are you sure you have your thermistor you changed to (should be the GT2 on in Repetier, something like temp sensor 8). If not, then you will get a temp readout of around 20 degrees lower than what it actually is. This would really affect your PC, especially since I think the min extrude temp for your hotend with fairly standard config is around 285C.

[shapeshifter]

I don't know if this helps but from what I can work out each version of the Rambo is different. For example I have version 1.3L and I already have an Analog-EXT header on the board from the factory. You can see in the pictures below how I have +5v to pin1, ground to pin2 and Signal to pin7 PK0. After adjusting the firmware properly, this gave me a readout that I could see on the LCD and in repetier-host but my reading was wildly fluctuating anywhere up to 20deg higher than it should have been. I am not sure why but someone did mention to me that it could be to do with the difference between the reference temp of the ad597 chip and the actual thermocouple temperature and the resulting signal it puts out. I re-wired multiple times and and tried different probes and pin locations as well as grounding the probe directly which did help a bit but not enough... I even managed to get an reading using the T0 pin for signal and ground but the temperature was still fluctuating and inaccurate. In the end I put a new high quality thermistor back in because I didn't have the time to stuff around further and I can print PC fine with a 300deg ceiling anyway. Long story short, I need a stable consistent reading which I already get from using a quality thermistor so until I learn more or have the time thats as far as I'm willing to experiment. I hope this is of some use... someone more switched on than me will probably tell me where I went wrong and I will give it another shot but for now that's my experience.

[Noob]

Wow!!! Thank you guys for all the info, and detailed pictures. Your V2 looks really trick!!!!! This has saved me a lot of consternation and heartache especially if the PC prints will work without the modification. The fluctuation described is puzzling, and if I learn more on the root cause I will respond here. Thanks again!

[jdurand]

A customer just offered to pay for an upgrade on the printhead for the RMax that we have on order so we can print the more exotic stuff. At the moment I won't have the time to do a dual filament upgrade, but was wondering if I got the Cyclops head could I just run it as a single for now?

Or, should I just get the v6?

[bot]

You would have to at least jam some filament in the second port to plug the filament path on that side.