Part Cooling Fan not working on P6 and P8

[incurio]

I am running an e3d toolchanger , Core XY printer with 4 tools. Running latest version of RRF2

The Fan on P6 has not been working for a while now, so after unplugging the board and rewiring it again , I am now no longer getting fan p8 to turn on as well,.

What I am seeing -- when I plug and measure the current from P6 and P8 it is reading in the 23-24V range all the time, even if the tools are not active.

The 2 cooling Fans in P2 and P4 have a Voltage of 0 when not running and ramp up as I slide the fan from the web UI.

I applied a 24v charge to the 2 cooling fans on tools 3 and 4 (P6,P8) and they were spinning ok.

It is when I decided to measure the tools with working fans that I noticed that those had an initial voltage of 0 when powered off and not constant like the other 2.

All the thermostatic fans 1,3,5 and 7 are working fine. When I turn on the hotend the hotend fan will fire up as expected without fail.

Run out of ideas on what else to check -- hoping it may just be a config setting that I may have overlooked.

thx:

[incurio]

@incurio unable to post m122 command or config.g file -- being marked as spam.

[incurio]

@incurio Using a Duet2 WIFI with Duex5 expansion board v0.10

[Phaedrux]

@incurio said in Part Cooling Fan not working on P6 and P8:

@incurio unable to post m122 command or config.g file -- being marked as spam.

Please try again.

[incurio]

@phaedrux th

m122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 2.05.1 running on Duet WiFi 1.02 or later + DueX5
Board ID: 08DLM-996RU-N85S4-7J1FG-3S86N-KBAVN
Used output buffers: 3 of 24 (20 max)
=== RTOS ===
Static ram: 25712
Dynamic ram: 94712 of which 0 recycled
Exception stack ram used: 520
Never used ram: 10128
Tasks: NETWORK(ready,628) HEAT(blocked,1232) DUEX(suspended,160) MAIN(running,3728) IDLE(ready,160)
Owned mutexes:
=== Platform ===
Last reset 15:35:46 ago, cause: power up
Last software reset at 2022-02-14 21:03, reason: User, spinning module GCodes, available RAM 10412 bytes (slot 1)
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0041f000 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 28.2, current 31.6, max 32.5
Supply voltage: min 24.2, current 24.5, max 24.8, 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: 2022-02-15 14:23:33
Cache data hit count 4294967295
Slowest loop: 6.86ms; 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: 39, completed moves: 39, StepErrors: 0, LaErrors: 0, Underruns: 0, 0
=== Heat ===
Bed heaters = 0 -1 -1 -1, chamberHeaters = -1 -1
=== GCodes ===
Segments left: 0
Stack records: 3 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: 202.15ms; fastest: 0.08ms
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 2
  WiFi firmware version 1.23
  WiFi MAC address f4:cf:a2:66:49:8a
  WiFi Vcc 3.35, reset reason Turned on by main processor
  WiFi flash size 4194304, free heap 22952
  WiFi IP address 192.168.1.20
  WiFi signal strength -63dBm, reconnections 0, sleep mode modem
  Socket states: 0 0 0 0 0 0 0 0
  h tr
  h tr
  h
  tr h
  rt h
  tr h
  tr
  hrt h

[incurio]

@incurio config file.

; Configurat; Configuration file for Duet WiFi / Ethernet
; executed by the firmware on start-up

; General preferences
M111 S0 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves
M555 P2 ; Set firmware compatibility to look like Marlin

; Network
; Read https://duet3d.dozuki.com/Wiki/Gcode#Section_M587_Add_WiFi_host_network_to_remembered_list_or_list_remembered_networks
M550 P"****" ; Set machine name
M552 S1 ; Enable Networking
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet
M587 "**************"
M667 S1 ; Select CoreXY mode

; Endstops
M574 X1 Y1 S3 ; Set X / Y endstop stall detection
M574 Z1 S2 ; Set Z endstop probe
M558 P7 X0 Y0 Z2 H3 F360 I0 T20000 ; Set Z probe type to switch, the axes for which it is used and the dive height + speeds
G31 P200 X0 Y0 Z0 ; Set Z probe trigger value, offset and trigger height
M557 X10:290 Y20:180 S40 ; Define mesh grid

; Drive direction
M569 P0 S0 ; Drive 0 X
M569 P1 S0 ; Drive 1 Y
M569 P2 S1 ; Drive 2 Z
M569 P3 S1 ; Drive 3 E0
M569 P4 S1 ; Drive 4 E1
M569 P5 S1 ; Drive 5 E2
M569 P6 S1 ; Drive 6 E3
M569 P7 S0 ; Drive 7 COUPLER
M569 P8 S0 ; Drive 8 UNUSED
M569 P9 S0 ; Drive 9 UNUSED

M584 X0 Y1 Z2 C7 E3:4:5:6 ; Apply custom drive mapping
M208 X-35:328.5 Y-49:243 Z0:300 C0:260 S0 ; Set axis maxima & minima
M350 C8 I0 ; Configure microstepping without interpolation
M350 X16 Y16 Z16 E16:16:16:16 I1 ; Configure microstepping with interpolation
;M92 X100 Y100 Z1600 C100 E830:830:830:444 ; Set steps per mm
M92 X100 Y100 Z1600 C100 E830:830:830:444 ; Set steps per mm
M566 X400 Y400 Z8 C2 E2:2:2:2 ; Set maximum instantaneous speed changes (mm/min)
M203 X35000 Y35000 Z1200 C5000 E5000:5000:5000:5000 ; Set maximum speeds (mm/min)
M201 X6000 Y6000 Z400 C400 E2500:2500:2500:2500 ; Set accelerations (mm/s^2)
M906 X2000 Y2000 Z1330 C400 E1400:1400:1400:650 I30 ; Set motor currents (mA) and motor idle factor in percent
M84 S120 ; Set idle timeout

;Stall Detection
M915 C S5 F0 H200 ; Coupler

;Stall Detection
M915 X Y S5 F0 H400 ; X / Y Axes

; Heaters
;M305 P0 T500000 B4723 C1.196220e-7 R4700 ; Set thermistor
;M143 H0 S225 ; Set temperature limit for heater 0 to 225C
M305 P0 T100000 B4725 C7.06e-8 ; Set thermistor
M143 H0 S225 ; Set temperature limit for heater 0 to 225C

M305 S"T0" P1 T500000 B4723 C1.196220e-7 R4700 ; Set thermistor
M143 H1 S350 ; Set temperature limit for heater 1 to 350C

M305 S"T1" P2 T500000 B4723 C1.196220e-7 R4700 ; Set thermistor
M143 H2 S350 ; Set temperature limit for heater 2 to 350C

M305 S"T2" P3 T500000 B4723 C1.196220e-7 R4700 ;Set thermistor
M143 H3 S350 ; Set temperature limit for heater 3 to 350C

;M305 S"T3" P4 T500000 B4723 C1.196220e-7 R4700 ; Set thermistor
M305 S"T3" P4 T100000 B4680 C6.455513e-8 ; 300C thermistor from slice engineering
M143 H4 S300 ; Set temperature limit for heater 4 to 300C

; Tools
M563 P0 S"T0" D0 H1 F2 ; Define tool 0
G10 P0 X0 Y0 Z0 ; Reset tool 0 axis offsets
G10 P0 R0 S0 ; Reset initial tool 0 active and standby temperatures to 0C

M563 P1 S"T1" D1 H2 F4 ; Define tool 1
G10 P1 X0 Y0 Z0 ; Reset tool 1 axis offsets
G10 P1 R0 S0 ; Reset initial tool 1 active and standby temperatures to 0C

M563 P2 S"T2" D2 H3 F6 ; Define tool 2
G10 P2 X0 Y0 Z0 ; Reset tool 2 axis offsets
G10 P2 R0 S0 ; Reset initial tool 2 active and standby temperatures to 0C

M563 P3 S"T3" D3 H4 F8 ; Define tool 3
G10 P3 X0 Y0 Z0 ; Reset tool 3 axis offsets
G10 P3 R0 S0 ; Reset initial tool 3 active and standby temperatures to 0C

; Fans
M106 P0 S0 ; UNUSED
M106 P1 S255 H1 T70 ; T0 HE
M106 P2 S0 ; T0 PCF
M106 P3 S255 H2 T70 ; T1 HE
M106 P4 S0 ; T1 PCF
M106 P5 S255 H3 T70 ; T2 HE
M106 P6 S0 ; T2 PCF
M106 P7 S255 H4 T70 ; T3 HE
M106 P8 S0 ; T3 PCF

M593 F50 ; cancel ringing at 50Hz (https://forum.e3d-online.com/threads/accelerometer-and-resonance-measurements-of-the-motion-system.3445/)
;M376 H15 ; bed compensation taper

;tool offsets
; !ESTIMATED! offsets for:
; V6-tool: X-9 Y39 Z-5
; Volcano-tool: X-9 Y39 Z-13.5
; Hemera-tool: X-37.5 Y43.5 Z-6

;; when you use calibratoin cube for 1mm, make sure x and y ofsets are also set.
;; cube should be smack in middle. for correct x and y
;; .46 - T1 multi material X orig 6
;; .83 - T2 multi material X orig 6

;; calibrated x/y offset off of Tool 0 -- using camera
;; heat bed when measuring z-offsets!!

G10 P0 X+6.2 Y41 Z-2.95
G10 P1 X+6.185 Y41.15 Z-2.95 // was 3.20
G10 P2 X+5.1 Y40.05 Z-2.86
G10 P3 X+6.1 Y41.3 Z-2.97

;deselect tools
T-1

;M572 D0 S0.2 ; pressure advance T0
;M572 D1 S0.2 ; pressure advance T1
;M572 D2 S0.2 ; pressure advance T2
;M572 D3 S0.2 ; pressure advance T3

M501; load config-override.g

nnff, g

shj df

[incurio]

@incurio had to add some random characters to be able to post without being marked as spam ..

[Phaedrux]

It sounds like you found the cause in your other thread.

https://forum.duet3d.com/topic/27325/duex5-issues-with-fan

[incurio]

@phaedrux That was the replacement board that I got -- and it was fried .. not sure how/when that happened.

I pulled that out and reverted to original board and now another cooling fan not wrking in original. But original doesnt have any burn marks.

I dont think I know what is the issue -- for ex: is it normal for part fan to read 24v even when not running? what could be causing that?

[Phaedrux]

@incurio said in Part Cooling Fan not working on P6 and P8:

is it normal for part fan to read 24v even when not running? what could be causing that?

No that is not normal and indicates a failed fan mosfet. That usually happens from a fan with an internal short or shorted wiring, though they can also fail on their own. However given the number of fan issues on multiple boards it seems like it's maybe a fan/wiring issue.

[incurio]

@incurio here is timeline:

been printing filaments that dont need part cooling:
-- noticed that fan on P6 not powering up.
-- verified connections on fan workng ok, then bought a new replacement Duex5
-- installed Duex5 fan P6 working , now P8 not working --
-- close examination of new Duex5 shows burning -- ask for refund or replacements ( asked to post in this channel )
-- put back old Duex5 now fans P6 and P8 not working. same issue Fan volt reads as 24V when not powered on.
-- dont know root cause yet -- is this a known issue that can happen to Duex5 ?

[incurio]

@phaedrux I am not an electrician is this something I could fix? i.e replacing mosfet?

what kind of wiring issue might cause mosfet to blow?

thx

[incurio]

@incurio I am using the same kind of fans on all the toolheads.

[Phaedrux]

The mosfets can be replaced if you're handy with hot air or a soldering iron. They are small though.

https://docs.duet3d.com/en/User_manual/Troubleshooting/Parts#fan-mosfet

Usually it's a fan shorting that can cause them to fail. Positive and negative touching.

Fans can sometimes short internally as well. Do all the fans work when connected to voltage directly?

[incurio]

@phaedrux All the fans are working when I use a separate 24v power source.

Not being an electrician when I noted there was 24v pwr on bad fan -- I eneded up replacing the wiring on my fan until I realised ( dumb me ) that it should have initially read a value of 0.

I didnt realise that the fan itself might short out.. i am using 24v fan winsinn -- I did read some article about them being unreiable fans.

What can I do to prevent a short from fan blowing my mosfet?