Solved Duet 2 Wifi rebooting/crashing during print

[dc42]

Is the Berdair driven directly from a Duet heater output? If so then I suggest twisted pair wires between the two. Hand twisted will do.

Have you connected a fast recovery flyback diode in parallel with the Berdair? The best place for it is on the motor terminals. Make sure you connect it the right way round!

[bwnance]

@dc42 the Berdair is connected directly to FAN0 -- i was under the impression that a flyback diode had been included on all the fan headers in recent board revisions - i might have misunderstood?

[bwnance]

@dc42 just got another crash -- should i have the berdair wired differently than i do now?

m122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.2 running on Duet WiFi 1.02 or later
Board ID: 08DJM-9178L-L2MSD-6J1FA-3S46N-KSFYP
Used output buffers: 3 of 24 (11 max)
=== RTOS ===
Static ram: 23460
Dynamic ram: 72744 of which 24 recycled
Never used RAM 15852, free system stack 191 words
Tasks: NETWORK(ready,188) HEAT(blocked,307) MAIN(running,452) IDLE(ready,19)
Owned mutexes: WiFi(NETWORK)
=== Platform ===
Last reset 00:01:26 ago, cause: software
Last software reset at 2021-01-26 23:27, reason: HardFault invState, GCodes spinning, available RAM 15608, slot 1
Software reset code 0x4063 HFSR 0x40000000 CFSR 0x00020000 ICSR 0x0041f003 BFAR 0xe000ed38 SP 0x2001ffc0 Task NETW Freestk 31192 ok
Stack: 400a4000 2000222c 00000003 00000001 200000ac ffffffed 00000000 200f000e 00000000 00f00000 e000ef34 c0000000 20004690 004548f5 0045465c 61000000 ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Error status: 0x00
Aux0 errors 0,0,0
MCU temperature: min 25.0, current 25.3, max 26.1
Supply voltage: min 24.0, current 24.1, max 24.2, under voltage events: 0, over voltage events: 0, power good: yes
Driver 0: position 62532, standstill, SG min/max not available
Driver 1: position 62532, standstill, SG min/max not available
Driver 2: position 62532, standstill, SG min/max not available
Driver 3: position 0, standstill, SG min/max not available
Driver 4: position 0, standstill, SG min/max not available
Driver 5: position 0
Driver 6: position 0
Driver 7: position 0
Driver 8: position 0
Driver 9: position 0
Driver 10: position 0
Driver 11: position 0
Date/time: 2021-01-26 23:28:54
Cache data hit count 106076577
Slowest loop: 6.33ms; fastest: 0.20ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest read time 1.0ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 0ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1 -1 -1, chamberHeaters = -1 -1 -1 -1
=== GCodes ===
Segments left: 0
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
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 15.65ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8
- WiFi -
Network state is active
WiFi module is connected to access point 
Failed messages: pending 0, notready 0, noresp 0
WiFi firmware version 1.25
WiFi MAC address dc:4f:22:6e:6c:ca
WiFi Vcc 3.43, reset reason Turned on by main processor
WiFi flash size 4194304, free heap 19328
WiFi IP address 192.168.86.20
WiFi signal strength -36dBm, mode 802.11n, reconnections 0, sleep mode modem
Clock register 00002002
Socket states: 0 0 0 0 0 0 0 0

[dc42]

@bwnance said in Duet 2 Wifi rebooting/crashing during print:

@dc42 the Berdair is connected directly to FAN0 -- i was under the impression that a flyback diode had been included on all the fan headers in recent board revisions - i might have misunderstood?

We don't advise connecting a Berdair directly to a fan port. The starting current of the motor will exceed the peak rated current of the fan mosfet, causing it to fail after a while.

[bwnance]

@dc42 I connected the EZ-Switch that the berdair comes with to an unused heater block + a fan header -- This appears to have solved the crashing issues.

Using any high PWM frequency after this ended up resulting in "all or nothing" fan control -- i dropped the frequency down to 20hz and that seems to have solved the issue, though.

[dc42]

Thanks for the update! I'm glad the problem is solved. I'll mark this as solved, but feel free to un-mark it if the problem recurs.

[bwnance]

@dc42 thank you so much for the support! I really appreciate it

[Robthide37]

@dc42 and @Phaedrux and @bwnance please correct me if i am wrong i am going to be adding my ez out switch now to as i was under the impression the 1 amp plus 50 percent for start was still ok for the mosfet on fan0 but anyway i plan on swithing to a brushless pump anyway as i found a kvp8 pump that flows a large amount and can run series or parallel.
I run berd air as well and two things the pump is very noisy it actually can make my camera get artifacts from the emi. Also if you remove the flux ring you will increase rpm as we are not running a high pressure system. Last why are you using a heater block oyu should be connecting 24v constant to the ez pwm board then use the fan output. The only time you would do what you listed would maybe be with a brushless motor that has built in controller and you wanted to run 3wire or try and run a 4 wire with tach but in that situation i would think you would use and endstop output to pwm control the brushless pump so that it only gets 5v unless you want to run all fans at 5v. I say that cause most things do not like the 24v pwm control signal.

[dc42]

Brushed DC motors usually take much more than 50% extra current when starting. More like 500%. Brushless motor have much lower starting currents.

[Robthide37]

@dc42 Ohhh thankyou i did not know that i was just using the info from my generator and my well pump starting load vs running load lol