Fan2 control

[mavgrab302]

Anyone know how to control the fan2? I recently added a object fan but can't seem to find anything about having cura control it..it is on all the time. I did read you can change it in marlin but not sure how to go about it..

[spiderdaddy]

Do you mean the part cooling fan? That will be Gcode M106.
In Slic3r you can specify when the fan should come on.

[mavgrab302]

does it let you control speed in slicr? I have been using cura, being pronterface is a bit messy and needs some tweaking. yeah I'm not too sure i understand eactly how to go about changing it in marlin, that has to be activated in order to control it in marlin first correct?

[spiderdaddy]

It is the slicer which should define when the fan is on or not. The slicer knows when there are thin walls or layers which will take less than a given time.
In Slic3r you can control all of that.
I assume that cura will either have similar settings in the advanced tab, or just 'decide' for you.
You don't need to change the Firmware AFAIK.

[mavgrab302]

too many abbreviations this morning..lol
yeah i dont think cura has a object fan option, it just says cooling fan...I know when IAP should how to set it up i noticed they said dont check off heated bed but then it wont heat unless you manually do it through lcd..so i checked it and it worked but i cant find a object fan option cura..I'm a bit confused but inorder to turn it on am I supposed to pull up gcode in cura and manualy type it in? If so what do i type in?

[spiderdaddy]

The cooling fan and the object fan are the same thing. Don't confuse this with the extruder fan, which should generally be on all the time.

According to this:
https://www.ultimaker.com/spree/uploads ... l_v1.0.pdf page 28
and this
http://umforum.ultimaker.com/index.php? ... timaker-2/
you can enable this fan somehow and also indicate speeds etc.

I don't use Cura so YMMV and don't take my word for it

[mavgrab302]

Yeah I have read that manual twice..lol..still can't seem to control that fan though. If the printer is on the object fan is on..the extruder fan is only on after I've reached 210degrees..I'm thinking of just adding a switch on it.

[greg]

You have your fans reversed. The Fan1 port is for a part-cooling fan. The Fan2 port is always on and should have your extruder's cold end cooling fan attached. The RigidBot firmware DOES NOT have a heat-sensitive extruder fan, they are relying on you using the always-on Fan2 port for your extruder. You will very likely melt the PEEK insulation block or have frequent filament jams if you put the extruder cold end fan into Fan1, and as you've observed you will not have any control over Fan2.

[mavgrab302]

I've read that before but swear they instructed it to go in the fan1 slot...thing is if i turn the printer on that fan will be on continuously..even when not heating...any way to fix that? or i guess i should just put a switch on it..