Stock Taz 6 Thermistors

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kcchen_00
Posts: 1695
Joined: Thu Feb 19, 2015 12:42 am

Re: Stock Taz 6 Thermistors

Post by kcchen_00 » Sat Mar 17, 2018 7:34 pm

You should try the Lulzbot cartridge thermisters first... A lot less hassle than having to deal with an external board, IMO.

https://www.lulzbot.com/store/parts/100 ... stor-235mm

doenute
Posts: 74
Joined: Thu Jun 18, 2015 7:33 am

Re: Stock Taz 6 Thermistors

Post by doenute » Wed Mar 21, 2018 8:25 am

kcchen_00

I might give this a go as well. If I read the details found at your link for the new thermistor it says to use "Table 5" in firmware.

I went to the Development site at Lulzbot and found that for the firmware I am using 1.1.5.71 FlexyDually V2 that it seems to show the thermistors being referenced to this already??

#define CUSTOM_MACHINE_NAME "LulzBot TAZ 6"
#define MACHINE_UUID "845f003c-aebd-4e53-a6b9-7d0984fde609"
#define EXTRUDERS 2
#define POWER_SUPPLY 0
#define TEMP_SENSOR_0 5
#define TEMP_SENSOR_1 5
#define TEMP_SENSOR_2 0
#define TEMP_SENSOR_3 0
#define TEMP_SENSOR_4 0
#define TEMP_SENSOR_BED 7

Bearing in mind I have no idea what I am doing in the firmware nor exactly how to change and recompile it, what do you think? I wonder if its worth a try to just plug in and run with it....


Thanks
Bill

kcchen_00
Posts: 1695
Joined: Thu Feb 19, 2015 12:42 am

Re: Stock Taz 6 Thermistors

Post by kcchen_00 » Thu Mar 22, 2018 9:21 pm

You found the right resources to re-program the firmware to support the E3D thermisters.

Have you compared the Aerostruder's configuration.h file to the stock Taz6 tooolhead? If the thermister values are the same, then it should be okay to use as long as the copper cylinder fits in the hotend...

I dug out my old single toolhead that came with my TAZ5. The new cartridge thermister will not fit in the hexagon block... so you may be back to working with the glass thermister. See attached...
Attachments
IMG_20180322_225753.jpg

ocelot27
Posts: 52
Joined: Sun Jan 29, 2017 4:10 pm

Re: Stock Taz 6 Thermistors

Post by ocelot27 » Sat Mar 24, 2018 1:24 pm

You shouldn't have to do anything to the firmware if you order the correct thermistor (Semitec 100kOhm).

The Taz 6 uses the same Semitec thermistor as the one that E3D supplies with their hot ends unless otherwise specified.

I've had both the Semitec and PT100 RTD's fail BTW... and the way they fail is annoying - the temp reads right but is cooler than indicated - so you start having issues with layer adhesion etc then finally your extruder jams because it's reading right but is too cool to melt the plastic.

Wiring up the little amp board is simple and changing the pin and temp tables in the FW is also simple - up to you - I can make you a K-type TC potted in a brass cartridge if you want to try it out - no charge.

-john

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