My first run of the day keeps giving an !! Exception in fan message after printing the first layer. Any ideas on how to diagnose/resolve the issue? Using orca slicer with standard settings. Runs fine on subsequent runs.
Maybe a stupid question, have you checked if the fan is running normally, with no particular resistance?
Very valid question, both fans move fine. Also just finished a print and can cycle the fan 0-100% no issue.
The fans have a tachometer and send a signal back to the board so that the board can monitor the speed. Even if the fan is spinning, the board may not receive a message and display an error.
If you have already updated to the newest firmware to fix this issue…
You can comments these lines to turn it off:
224 #
225 #
226 #
Same issue here. Can’t print anything.
Already updated via OTA and checked all fan cables.
starting the fan by hand via the web interface works. Just when it starts after the first layer → exception.
Any idea how to fix this without deactivating the tachometer checks?
You can send an e-mail to info@sovol3d.com. Please enclose the problem pictures
If the fans are running fine, you can edit printer.cfg (via web interface) and comment out the tachometer_pin. That will disable the check.
Sovol did an awful job implementing the fan check. Fan commands are scheduled, together with all mcu commands. But they check immediately after scheduling. They should check only after the command was executed. If the schedule is long, the check gives false positives.
I’m also having this issue, first 10-15 prints worked fine, now “!! Exception fan” after the first layer about 70% of the time.
This seems to be sudden issue.
Thanks for the extra info that makes sense. I’d rather not drop the checks, would be good if there was a way to delay the check if it’s a timing issue. I’ve messaged Sovol info, I’ll see what they say.
I ended up changing the setting in orca to use the part cooling fan from the beginning of the print, and turned the bed temperature up by about ten degrees for the first layer. Not ideal but so far so good.
Update to latest firmware version seems to have fixed the issue.
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So far in hours of trying to print only one 1.5-hour print succeeded.
I am on update 19 and the printer still gets the “Exception in Fan” for every print. The fans all work, can turn on/off and can be adjusted in through the web interface.
I have tried:
Using the USB instead of printing over air; neither has worked.
Resetting the printer through the screen.
Using 100% fan from layer 0
I also ran into this error, even after updating to version 19. To work around this issue, I used the advice given above. I modified the printer.cfg file to disable the fan tachometer for [fan], not ideal but better than no print.
This file can be access through the web portal (found by going to the printer’s IP address in a web browser) or by access through the Device page in Orcaslicer. Go to Device → Machine and scroll to the printer.cfg file. In here you will be able to comment out the lines shown in the image above.
Was getting same message. Seems dumb, but control case broke open when printing Sovol’s 3DBenchy. Just bought printer and setting up. Fixed with temp fix. Don’t know if they monitor this forum, but need new case. bolt pulled through. Otherwise have to ship whole thing back.
Printing fine with door clamped shut.
Open a ticket at info@sovol3d.com with your order number
@sovol3d
Can confirm, the mainboard housing latch breaks quite easily. If you tighten it even a little bit too much, the lip in the plastic standoff on the door that the hex screw tightens against snaps off.
Luckily, mine broke cleanly, and I was able to superglue it back on. And now I’m just very careful not to tighten it at all. Just snug enough it doesn’t rattle, no more. But I suspect other folks will have the same issue, and a redesign seems in order. (Either a sturdier screw mount or a magnetic latch so there’s no screw to mess with at all.)
I just purchased the Sovol SV06 Ace and I have only been able to print some small earrings. The next project I tried gives me the Exception in Fan error after the first layer. I have upgraded the firmware but this did not resolve the issue. I’m a newbie printer and have an Ender so I have done some tinkering but I’ve never edited code before. I have contacted Sovol and asked for help, but has anyone had a resolution to this issue?