Tool Head v2.1 fans

General LulzBot TAZ
1

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


Thanks

2

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

3

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

4

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 !!

5

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

6

I might leave them off for now.

Thanks a lot I really appreciate your replies