# Tool Head v2.1 fans

**URL:** <https://forum.lulzbot.com/t/tool-head-v2-1-fans/4460>\
**Category:** LulzBot TAZ\
**Created:** [January 17, 2017, 5:53pm UTC](https://forum.lulzbot.com/t/tool-head-v2-1-fans/4460 "2017-01-17T17:53:08Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![Ahmadiah](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@Ahmadiah](https://forum.lulzbot.com/u/Ahmadiah)\
**Post date:** [January 17, 2017, 5:53pm UTC](https://forum.lulzbot.com/t/tool-head-v2-1-fans/4460/1 "2017-01-17T17:53:08Z")

</div>

Hello,

I am using the tool head V2.1 (comes with three fans one on each side and one on the middle). Only one fan works when I am printing and the rest (two fans) do not work regardless of how big the thing I am printing. Is that normal ? or may be the Cure has to be updated on my PC?

Here is the tool head I am talking about:  
[https://www.lulzbot.com/store/tool-heads/lulzbot-taz-single-extruder-tool-head-v21](https://www.lulzbot.com/store/tool-heads/lulzbot-taz-single-extruder-tool-head-v21)  
  
  
Thanks

---

<div class="post-metadata">

**Author:** ![robajohn](https://avatars.discourse-cdn.com/v4/letter/r/5f9b8f/32.png) [@robajohn](https://forum.lulzbot.com/u/robajohn)\
**Post date:** [January 17, 2017, 6:05pm UTC](https://forum.lulzbot.com/t/tool-head-v2-1-fans/4460/2 "2017-01-17T18:05:30Z")

</div>

Some filaments don’t use the side fans. However, in Cura on the bottom of the advanced tab you will find the fan controls.

---

<div class="post-metadata">

**Author:** ![PHugger](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/phugger/32/89_2.png) [@PHugger](https://forum.lulzbot.com/u/PHugger)\
**Post date:** [January 17, 2017, 6:43pm UTC](https://forum.lulzbot.com/t/tool-head-v2-1-fans/4460/3 "2017-01-17T18:43:35Z")

</div>

The Cura Filament Cooling Fan settings are on the Advanced Tab at the bottom - Cool - Enable Cooling Fan  
Your only choices there are -

**Fan on at Full Height**  
This is your Z height where your fan will be turned on to its minimum  
percentage setting. Especially helpful with high temperature retaining  
filaments such as PLA. This will be scaled between 0%, and your minimum  
fan speed based upon layer height; with it being disabled for the first layer.

**Fan Speed Min**  
This will be the speed your fan runs when enabled at full height. Once the  
Z height is reached for Fan on at Full Height, this will be the speed your  
fan runs at.  
**Fan Speed Max**  
This is the fastest speed at which your fan will ever run. When your print  
speed is slowed down due to minimal layer time, your fan will run between  
minimum and maximum speed. The maximum fan speed is reached when  
your printer must be slowed by 50% or greater.

The other fan (center) cools the extruder throat. This part needs to remain as cool as possible - heat creep is the enemy here.  
The center, throat fan should be on full all the time. Cura provides no way to adjust this. You want it on.  
  
  
  
Best regards,  
PCH

---

<div class="post-metadata">

**Author:** ![Ahmadiah](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@Ahmadiah](https://forum.lulzbot.com/u/Ahmadiah)\
**Post date:** [January 17, 2017, 7:31pm UTC](https://forum.lulzbot.com/t/tool-head-v2-1-fans/4460/4 "2017-01-17T19:31:31Z")

</div>

Thanks PHugger and robajohn, do you think I should turn them on when I am printing? I mean is there any benefit. I am using ABS most of the time,

Thank you again !!

---

<div class="post-metadata">

**Author:** ![PHugger](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/phugger/32/89_2.png) [@PHugger](https://forum.lulzbot.com/u/PHugger)\
**Post date:** [January 17, 2017, 7:54pm UTC](https://forum.lulzbot.com/t/tool-head-v2-1-fans/4460/5 "2017-01-17T19:54:54Z")

</div>

All I can say is - It Depends…

For ABS the general consensus is to leave them off.  
I have also heard contrary advice.  
The biggest effect is prints lifting off the bed caused by uneven cooling.  
Your mileage will vary.

It probably depends on whether your printer is enclosed (warm) or not.  
  
  
Best regards,  
PCH

---

<div class="post-metadata">

**Author:** ![Ahmadiah](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@Ahmadiah](https://forum.lulzbot.com/u/Ahmadiah)\
**Post date:** [January 17, 2017, 9:33pm UTC](https://forum.lulzbot.com/t/tool-head-v2-1-fans/4460/6 "2017-01-17T21:33:34Z")

</div>

I might leave them off for now.

Thanks a lot I really appreciate your replies