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any experience with thermocouples?

Posted by friarfish 
any experience with thermocouples?
January 21, 2016 05:34AM
Has anyone out there had experience using thermocouples instead of
thermistors?
Thinking of upgrading and wondering about what model thermocouple seems
to be the commonly accepted one to use as well as methods to connect
them to the RAMPS.
Looking before jumping this time.


Many thanks,
Andrew
Re: any experience with thermocouples?
January 24, 2016 05:55PM
You need an amplifier board connected to the aux pins of ramps. Maybe look at pt100 sensors as well if they fit in your hotend. They are sort of the new thermocouples.
E3D sell it all.
Thermocouples and pt100 sensors are two different this and requires different amplifier boards.


My Instructables - both total newbie instructables and some for intermediate users.
My Designs on Thingiverse
YouTube channel containing a few 3D printing videos - they are videos for my Instructables, and mostly not standalone.
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Re: any experience with thermocouples?
January 26, 2016 05:46AM
Dintid,
Thanks for the info.
I had cruised E3D recently and didn't twig they had the 'couples.
Just need to read up on plugging in the amp/controller. Is it simply
PnP or time to go code diving.


Andrew
Re: any experience with thermocouples?
January 26, 2016 07:25AM
Quote
friarfish
Dintid,
Thanks for the info.
I had cruised E3D recently and didn't twig they had the 'couples.
Just need to read up on plugging in the amp/controller. Is it simply
PnP or time to go code diving.


Andrew
If you use Marlin, then it is plug and play pretty much. You need to do the physical wiring of course, which is a 5v,gnd and signal from an AUX port on RAmps to the amplifier board.

Then you define the new sensor in configuration.h file and lastly you redifine the new pin in pins file.
If you use the AUX-1 pins to the right of the reset-button (not the servo pins), you most likely need to change pin 13 to pin 3 or 4 - diagram here

The pin-numbers are marked A3 and A4 for AUX-1

E3D PT100 selection
E3D Thermocouple selection


My Instructables - both total newbie instructables and some for intermediate users.
My Designs on Thingiverse
YouTube channel containing a few 3D printing videos - they are videos for my Instructables, and mostly not standalone.
Ultius / Tantillus Thingiverse Group
Re: any experience with thermocouples? SOLVED
February 11, 2016 12:30AM
Thanks Dintid,
appreciate the pointers.
Apologies for the delay.


Andrew
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