Duex5 fan output problem

[Jaspercohen]

Hello all,

This is my first time posting so thanks in advance. I am trying to setup a 12v 1.6amp water pump (for water cooling) on a modix printer, which comes with a duet 2 and duex5 board.

At the moment an LED strip is connected to "LED/FAN 7" and it works. When i hook up my multimeter i get 21V with the VIN jumper connected, and ~.03V with the 12V jumper connected. i'm not getting any detectible amperage in either jumper position.

I only have a glancing knowlege of electronics and i feel like i'm missing something. Below is the M122 report

6/15/2023, 6:46:46 PM: Connected to 192.168.1.186
6/15/2023, 6:47:41 PM: M122: === Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 2.05 running on Duet WiFi 1.02 or later + DueX5
Board ID: 0JD0M-9P6B2-NJ4S4-6JKD8-3S86T-TB16M
Used output buffers: 3 of 24 (7 max)
=== RTOS ===
Static ram: 25712
Dynamic ram: 94180 of which 0 recycled
Exception stack ram used: 320
Never used ram: 10860
Tasks: NETWORK(ready,628) HEAT(blocked,1232) DUEX(suspended,160) MAIN(running,3736) IDLE(ready,160)
Owned mutexes:
=== Platform ===
Last reset 00:02:05 ago, cause: software
Last software reset at 2023-06-15 18:45, reason: User, spinning module GCodes, available RAM 10860 bytes (slot 3)
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0441f000 BFAR 0xe000ed38 SP 0xffffffff Task 0x4e49414d
Error status: 0
Free file entries: 10
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest block write time: 0.0ms, max retries 0
MCU temperature: min 32.9, current 34.7, max 34.8
Supply voltage: min 24.0, current 24.2, max 24.5, under voltage events: 0, over voltage events: 0, power good: yes
Driver 0: standstill, SG min/max not available
Driver 1: standstill, SG min/max not available
Driver 2: standstill, SG min/max not available
Driver 3: standstill, SG min/max not available
Driver 4: standstill, SG min/max not available
Driver 5: standstill, SG min/max not available
Driver 6: standstill, SG min/max not available
Driver 7: standstill, SG min/max not available
Driver 8: standstill, SG min/max not available
Driver 9: standstill, SG min/max not available
Date/time: 2023-06-15 18:47:41
Cache data hit count 338630357
Slowest loop: 8.02ms; fastest: 0.07ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Move ===
Hiccups: 0, FreeDm: 160, MinFreeDm: 160, MaxWait: 0ms
Bed compensation in use: none, comp offset 0.000
=== DDARing ===
Scheduled moves: 0, completed moves: 0, StepErrors: 0, LaErrors: 0, Underruns: 0, 0
=== Heat ===
Bed heaters = -1 -1 -1 -1, chamberHeaters = -1 -1
=== GCodes ===
Segments left: 0
Stack records: 1 allocated, 0 in use
Movement lock held by null
http is idle in state(s) 0
telnet is idle in state(s) 0
file is idle in state(s) 0
serial is idle in state(s) 0
aux is idle in state(s) 0
daemon is idle in state(s) 0
queue is idle in state(s) 0
autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 15.24ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
HTTP sessions: 1 of 8
- WiFi -
Network state is running
WiFi module is connected to access point 
Failed messages: pending 0, notready 0, noresp 0
WiFi firmware version 1.26
WiFi MAC address f4:cf:a2:71:b0:ea
WiFi Vcc 3.46, reset reason Turned on by main processor
WiFi flash size 2097152, free heap 23520
WiFi IP address 192.168.1.186
WiFi signal strength -51dBm, reconnections 0, sleep mode unknown
Socket states: 0 0 0 0 0 0 0 0
=== Filament sensors ===
Extruder 0 sensor: ok

and here is the fan section of the config:

; Fans______________________________________________________________
M106 P0 S0 I0 F500 H-1 C"E0 BlowerFan"                       	    ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S0 I0 F500 H-1 C"E1 BlowerFan"                              ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off. 
M106 P5 T46 H1 							    						; Set fan 5. Thermostatic control is turned on
M106 P6 T46 H2 							   							; Set fan 6. Thermostatic control is turned on
M106 P2 I-1                                                         ; LED (optional)
M106 P3 I-1
M106 P8 I-1                                                     ; LED (optional) jasper- trying to turn this off so my other code will work
M106 P4 I-1                                                         ; LED (optional)
M106 P7 I-1                                                         ; Main LED 
;M106 P8 I-1                                                         ; LED (optional)

Any pointers would be super helpful. i believe this is running reprap firmware 2.05. i'd like to get this working without updating the firmware but I could be convinced. Thank you!

[Phaedrux]

@Jaspercohen said in Duex5 fan output problem:

M106 P7 I-1

This makes the pin available, now what do you want to do with it?
Is the pump intended to be switched on and off or run continuously?
Have you tested the pump yet with a direct 12v power source? Does it work?

At 1.6 amps for the pump you may come up against the current draw limit of the 12v regulator depending on what else you have connected to your fan ports.