# Dual Extruders and the TAZ **URL:** \ **Category:** Hardware\ **Created:** [May 23, 2013, 2:50pm UTC](https://forum.lulzbot.com/t/dual-extruders-and-the-taz/91 "2013-05-23T14:50:28Z")\ **Posts on this page:** 5\ **Page:** 3
**Author:** ![erv](https://avatars.discourse-cdn.com/v4/letter/e/2bfe46/32.png) [@erv](https://forum.lulzbot.com/u/erv)\ **Post date:** [November 14, 2014, 6:48am UTC](https://forum.lulzbot.com/t/dual-extruders-and-the-taz/91/41 "2014-11-14T06:48:05Z")
so glad to see flexi dualy in the store now ! I’ve printed mine after seeing James Bruton’s videos, it’s almost finished, however, I’m looking for a proper file showing the pinout of the connectors and harness, that’s the last step I need to install it. where can I find this ? thanks ---
**Author:** ![Orias](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/orias/32/3_2.png) [@Orias](https://forum.lulzbot.com/u/Orias)\ **Post date:** [November 14, 2014, 5:49pm UTC](https://forum.lulzbot.com/t/dual-extruders-and-the-taz/91/42 "2014-11-14T17:49:57Z")
Here’s the harness for a TAZ3: [http://devel.lulzbot.com/TAZ/Guava/production\_parts/Electronics/External%20Harnesses/Pre-Guava/](http://devel.lulzbot.com/TAZ/Guava/production_parts/Electronics/External%20Harnesses/Pre-Guava/) and the TAZ 4: [http://devel.lulzbot.com/TAZ/Guava/production\_parts/Electronics/External%20Harnesses/Extruder%20Extension%201.0.pdf](http://devel.lulzbot.com/TAZ/Guava/production_parts/Electronics/External%20Harnesses/Extruder%20Extension%201.0.pdf) ---
**Author:** ![billyd](https://avatars.discourse-cdn.com/v4/letter/b/ed655f/32.png) [@billyd](https://forum.lulzbot.com/u/billyd)\ **Post date:** [May 12, 2015, 10:25pm UTC](https://forum.lulzbot.com/t/dual-extruders-and-the-taz/91/43 "2015-05-12T22:25:44Z")
> [@bam](#): > > > [@mushoo](#): > > > > @Orias - nope. The fan connected to T0 (the extruder cabling that shipped with the TAZ4) activates, but T1’s fan does nothing. There’s an extremely tiny chance that I built my cable wrong, but everything else on it works fine so I doubt it. If your tech confirms that the firmware should work I’ll see what happens when I swap the cables around… > > Heyo! > > Looks like dual fan control isn’t in the firmware, I’ll get a version with dual fan control put together and throw it up here tonight or tomorrow depending on how long it takes. You’ll have a few options as to how to run them in configuration.adv, so you’ll be able to use them as heatsink fans, extrusion fans or a combination 🙂 > > Cheers > -bam Whatever happened with this? I still can’t turn on the extruder fan on the second extruder. ---
**Author:** ![ray](https://avatars.discourse-cdn.com/v4/letter/r/e9a140/32.png) [@ray](https://forum.lulzbot.com/u/ray)\ **Post date:** [May 21, 2015, 3:35pm UTC](https://forum.lulzbot.com/t/dual-extruders-and-the-taz/91/44 "2015-05-21T15:35:34Z")
Heyo! Dual fan control firmware can be found here, along with instructions to make it work: [https://forum.lulzbot.com/t/lulzbot-taz-dual-extruder-fan-mount/1027/1](https://forum.lulzbot.com/t/lulzbot-taz-dual-extruder-fan-mount/1027/1) Also, the TAZ 4 and 5 dual extruder firmwares found here currently have that fan control I believe: [https://www.lulzbot.com/support/firmware-flashing-through-cura](https://www.lulzbot.com/support/firmware-flashing-through-cura) See how that does for you! ---
**Author:** ![billyd](https://avatars.discourse-cdn.com/v4/letter/b/ed655f/32.png) [@billyd](https://forum.lulzbot.com/u/billyd)\ **Post date:** [September 14, 2015, 8:24pm UTC](https://forum.lulzbot.com/t/dual-extruders-and-the-taz/91/45 "2015-09-14T20:24:03Z")
> [@ray](#): > > Heyo! Dual fan control firmware can be found here, along with instructions to make it work: > > [Lulzbot TAZ Dual Extruder Fan Mount](https://forum.lulzbot.com/t/lulzbot-taz-dual-extruder-fan-mount/1027/1) > > Also, the TAZ 4 and 5 dual extruder firmwares found here currently have that fan control I believe: > > [https://www.lulzbot.com/support/firmware-flashing-through-cura](https://www.lulzbot.com/support/firmware-flashing-through-cura) > > See how that does for you! I never did get around to flashing this hex but it does me no good. I need all the source files so I can tweak the config.h settings for other important control of my printer. Do you have a link to the Taz 5 dual extruder firmware source files? The hex file, while convenient doesn’t allow me to tweak PID values and also set my actual extruder offsets. [Previous page](https://forum.lulzbot.com/t/dual-extruders-and-the-taz/91.md?page=2)