TAZ 5 Fan Wiring

A forum dedicated to the stock LulzBot TAZ 3D Printer
Mhbradner
Posts: 30
Joined: Fri Mar 13, 2015 3:23 am

TAZ 5 Fan Wiring

Post by Mhbradner » Sat Mar 28, 2015 10:40 pm

I received my TAZ 5 a couple weeks ago and am having an almost unreasonably good time with it. That said, I have a lingering question that I haven't seen an answer to. There are two fans associated with the Hexagon Hot End on the TAZ 5. One is a small fan that points at the heat sink above the hot end, and one is a large fan that points just below the nozzle on the hot end. The wires from the small fan are small, and the wires from the large fan are larger, however, the connectors into which you attach these wires are identical, and have identical wire sizes. My question is, does it matter which connector you plug which fan into? When I turn the TAZ 5 on, the little fan is always on, and the large fan speed is determined by settings of the firmware or the GCode that you are running. Is this correct, did I just get lucky in my wiring? Should I have control of the fan on the heat sink of the Hexagon hot end? Just asking...

Mark -
TAZ5

kcchen_00
Posts: 1721
Joined: Thu Feb 19, 2015 12:42 am

Re: TAZ 5 Fan Wiring

Post by kcchen_00 » Sun Mar 29, 2015 12:55 am

You got lucky :). If you look closely at the connectors there should be a dot of color on the male and female. Those two should go together.

The little blower for the heatsink should always be on, and the one pointed below the nozzle tip is adjustable through your slicing software and the LCD.

wantmys2000
Posts: 83
Joined: Fri Mar 06, 2015 11:01 am

Re: TAZ 5 Fan Wiring

Post by wantmys2000 » Sun Mar 29, 2015 12:45 pm

FYI - If you plug them in the wrong way you will fry the tiny blower. Its a 5v blower and the other fan is 24v.

So always look to the dots before plugging in those fans.

Thanks!
Steven

theBLOCK
Posts: 17
Joined: Wed Mar 11, 2015 3:08 pm

Re: TAZ 5 Fan Wiring

Post by theBLOCK » Sun Mar 29, 2015 3:22 pm

Pretty sure I fried my tiny blower. That or it isn't running with Repetier. Has anyone seen a location to purchase one?

wantmys2000
Posts: 83
Joined: Fri Mar 06, 2015 11:01 am

Re: TAZ 5 Fan Wiring

Post by wantmys2000 » Sun Mar 29, 2015 3:38 pm

Call or Email support. From the threads here they seem to be taking care of people.

Thanks!
Steven

Mhbradner
Posts: 30
Joined: Fri Mar 13, 2015 3:23 am

Re: TAZ 5 Fan Wiring

Post by Mhbradner » Sun Mar 29, 2015 5:17 pm

You're right, I was lucky. I checked for dots on the small fan connector and I had it connected correctly. One would think that if there were a chance of burning a fan up they would have mentioned the "Dot" marking on the connectors in step 7. However, what step 7 says is: "Connect the extruder assemblies' 4-pin connectors: match the Orange/red wire connector pair for the hot end and the mixed color wired connector pair for the extruder motor. Connect the matching pairs together so they lock and click". It says nothing about the fans, and nothing about dots. If the small fan burns out when incorrectly attached, I'm surprised that doesn't happen more often.

Mark -
TAZ5

kcchen_00
Posts: 1721
Joined: Thu Feb 19, 2015 12:42 am

Re: TAZ 5 Fan Wiring

Post by kcchen_00 » Sun Mar 29, 2015 9:50 pm

The heatsink fan is new to the TAZ5 since the TAZ4 had the ceramic hotends. I'm guessing it's an oversight in the documentation. Personally it seemed pretty intuitive to look for distinguishing markings when plugging like connectors.

Mhbradner
Posts: 30
Joined: Fri Mar 13, 2015 3:23 am

Re: TAZ 5 Fan Wiring

Post by Mhbradner » Mon Mar 30, 2015 12:23 am

Apparently not intuitive enough if people are burning up their small fans... In my experience critical connectors can not be miss-connected because they are keyed differently.

Mark -
TAZ5

BaltimoreBully
Posts: 47
Joined: Sun Feb 22, 2015 10:43 am

Re: TAZ 5 Fan Wiring

Post by BaltimoreBully » Mon Mar 30, 2015 5:48 am

I must have been very lucky as well. I didn't notice the colored dot on the fan plug and the other molex connector until I had to take my extruder apart after a jam. The funny thing is i noticed it almost right away when I was reconnecting the wires. If they are going to continue to use the hexagon hotend , this is definitely something that needs to be added into the instructions. As Mhbradner said, I made sure I had the big connectors connected properly as per the documentation. But when there was no specific mention of the smaller wires, I figured oh well it's just two fans, it must not matter which one gets plugged into which.

kcchen_00
Posts: 1721
Joined: Thu Feb 19, 2015 12:42 am

Re: TAZ 5 Fan Wiring

Post by kcchen_00 » Mon Mar 30, 2015 8:52 am

Yeah... I guess it was second nature for me to check since I usually number or mark connectors of this sort for RC.

As far as I know, there are no keyed molex connectors... its tabbed or untabbed 2 wire connectors. Maybe they could do a molex and JST (trapezoid)... or reverse the connectors. But the latter two options would go against industry standards from an electronics perspective... driving up costs for custom production.

The micro-mini blower seems really hard to find, so I wouldn't be surprised if they went back to a 20x20 box fan with a duct.

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