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Marlin & dual thermistors for one hot end

Posted by Yvan 
Marlin & dual thermistors for one hot end
February 02, 2014 09:22PM
Hello Everyone,

For safety reasons I'm trying to impliment dual thermistors on one hot end.

I found this :J_head

When I look in Marlin, I don't see anything that matches up with the above.

The lastest version of Marlin I downloaded from Github is from eight months ago. So what happened to the dual thermistor option? It never existed?

Thanks for any help!


Yvan

Singularity Machine
Re: Marlin & dual thermistors for one hot end
February 02, 2014 10:15PM
Try looking at TEMP_SENSOR_1_AS_REDUNDANT around [github.com]
Re: Marlin & dual thermistors for one hot end
February 02, 2014 11:04PM
Hi Dave, thanks for the reply.

This is what I have in the latest version of Marlin I downloaded from Github a couple of hours ago, starting a line 92:

#define TEMP_SENSOR_0 1
#define TEMP_SENSOR_1 0
#define TEMP_SENSOR_2 0
#define TEMP_SENSOR_BED 0

// Actual temperature must be close to target for this long before M109 returns success
#define TEMP_RESIDENCY_TIME 10 // (seconds)
#define TEMP_HYSTERESIS 3 // (degC) range of +/- temperatures considered "close" to the target one
#define TEMP_WINDOW 1 // (degC) Window around target to start the recidency timer x degC early.

// The minimal temperature defines the temperature below which the heater will not be enabled It is used
// to check that the wiring to the thermistor is not broken.
// Otherwise this would lead to the heater being powered on all the time.
#define HEATER_0_MINTEMP 5
#define HEATER_1_MINTEMP 5
#define HEATER_2_MINTEMP 5
#define BED_MINTEMP 5


How can I download the variant that you link too in your reply?

BTW, I've spent some time trying to figure out Github, it is very awkward to use, so maybe I'm missing several steps?


Yvan

Singularity Machine
Re: Marlin & dual thermistors for one hot end
February 03, 2014 01:54AM
That link was from drilling down of of the current [github.com] into Marlin/Configuration.h (on the Marlin_v1 branch?)

You should be able to get it from the zip download link on the right hand size of the page, which links to [github.com]

Personally, I use 'git clone git@github.com:ErikZalm/Marlin.git' work from the command line.
Re: Marlin & dual thermistors for one hot end
February 03, 2014 02:45AM
Okay thanks! The second link you gave worked, and I now see line 131 with reduntant temp. Will be working on that tomorrow. smiling smiley


Yvan

Singularity Machine
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