Layer and Hotend fan not coming on

[davec3275]

I recently picked up a V3.2 off eBay and after replacing the whip and hotend with brand new ones from SeeMeCMC and installing per the setup guide, none of my fans work (not the hotend fan nor the part cooling fan). I tried heating the hotend to temp and the hotend fan still did not come on.

When I place the hotend fan wire to a different port, it comes on just fine; however, nothing I do will turn the part cooling fan on.

Attached is a picture of how the original owner wired the part and hotend fans (orange an purple wires) as well as my current config.g file!

IMG_0639.jpg .

I am running stock firmware from SeeMeCNC as the V3.2 came with nothing loaded on the SD Card (so any setting change made to get it to work were lost).

Here is the output from the M115 command:
10:43:40 AMM115
FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 2.02(RTOS) ELECTRONICS: Duet WiFi 1.02 or later FIRMWARE_DATE: 2018-12-24b1

config.g

I am new to Duet boards so any assistance is appreciated. I am hoping it is not the board itself that needs to be replaced.

[droftarts]

@davec3275 This is your fan code at the moment:

M106 P0 H-1                                ; Part Cooling Fan
M106 P1 S0.5 H-1                           ; Case fan
M106 P2 T50 S0.7 H1                        ; Heat sink fan

Wiring diagram:

At the moment you have orange and purple wires (part and hotend fan, negative side I assume) connected to the FAN1 (M106 P1) connector. If these fans aren't coming on when connected, most likely the MOSFET (electronic switch which is on the negative pin) has failed. A close up picture of the fan pins may reveal if this is the case. I guess these two fans are getting the positive side from elsewhere? I can't tell. If the hotend fan is working when connected to another pin, but the part fan isn't, most likely there's a wiring issue or the part fan has failed.

You have something else connected to one of the always on fans pins, and I think an empty connector to the other one? If that fan isn't working (and it won't be controllable, just on all the time) check the fan fuse.

Ian

[davec3275]

@droftarts Thank you for the feedback. Let me clarify one thing. The image in my original post was how I received the machine/board setup. I since set the printer up as per the manufacturer (see included images).

I am fine having the hotend fan on all the time as all of my other printers are like that as well. I just need to figure out the layer fan. Are the fuses something easily changed?

.

[droftarts]

@davec3275 so what exactly are the green, orange and purple wires, and the red and red/black pair? Are the green, orange and purple wires the negative side of three separate fans (they should be, or you risk damaging the MOSFET)? Where do they get their power from?

The fan fuse is a blade fuse just next to the always on fan connectors. Pull it out to check it (with power off).

Ian

[davec3275]

@droftarts Here is what each color wire is for:

LED: Green Wire - 2 pin KK connector - PIN 2
HotEnd FAN: Purple Wire - 2 pin KK connector - PIN 2
LAYER FAN: Orange Wire - 2 pin KK connector - PIN 2
The additional black and red pair are for the Duet fan

Here is how the manufacture instructs us to connect the fans. Not being familar with the Duet I would guess that the wires are connected to the negative side of each fan connector.

I will check the fuses when I am off work.