Firmware SHUTDOWN: MCU fried?

Hello everyone, After a few weeks I booted my VC3.1 again and now it crashes when I try anything (homing, heating up, etc.). Also, the 4028 fan no longer starts at 100% when booting up, which it used to do. I have had an Octopus 1.1 installed since October 2021 and never had such problems. Could it be that the MCU is defective? How should I proceed with troubleshooting?
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55 Replies
blacksmithforlife
blacksmithforlife•2mo ago
Something is wrong with your wiring
fargo
fargoOP•2mo ago
I didnt change anything...🫤
blacksmithforlife
blacksmithforlife•2mo ago
That doesn't negate the fact that all the problems you described are caused by wiring issues
fargo
fargoOP•2mo ago
Ok, point taken. But which wires? It happens when I try to home or to heat up hotend/bed. Those two things arent related as far as I can tell.
blacksmithforlife
blacksmithforlife•2mo ago
I can't tell you, but something is shorting or broken if the fans aren't going 100% during startup when they used to. Start unplugging things and seeing if the problem goes away. Then investigate why that item is causing the issue. This is going to involve a lot of investigations and only you can do that
fargo
fargoOP•2mo ago
OK, now with nothing at all attached but the RPi, I get I2C NACK error. Any ideas?
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blacksmithforlife
blacksmithforlife•2mo ago
never seen that error before did you remove the drivers and everything?
fargo
fargoOP•2mo ago
Yes, everything
blacksmithforlife
blacksmithforlife•2mo ago
Maybe firmware got corrupt somehow, but if it were me I would treat the board as faulty and replace it
fargo
fargoOP•2mo ago
I also reflashed it, to no avail. Replacement is already ordered.
fargo
fargoOP•4w ago
OK, this is getting very infuriating. I have now replaced the RPi and the Ocotpus, together with all the stepper drivers. I also did a fresh install of the most recent RatOS. With nothing except the heaters and temp probes attached to the MCU, it wont even heat. Trying to get it to move in any direction, (setting the kinematic position) I get this error. I am pretty much lost at the moment, dont even have an idea where to begin with troubleshooting and would really be grateful for any advice from the pros out there.
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miklschmidt
miklschmidt•4w ago
Which drivers are you using (TMC model and manufacturer and version)? Also please post a debug-zip It's likely you accidentally picked the wrong board or something.
fargo
fargoOP•4w ago
TMC2226 V1.0
miklschmidt
miklschmidt•4w ago
BTT?
fargo
fargoOP•4w ago
yes
miklschmidt
miklschmidt•4w ago
I need a pic of your board and a debug-zip
fargo
fargoOP•4w ago
I will be happy to go through the wizard again...
miklschmidt
miklschmidt•4w ago
Let's see what's wrong first 🙂
fargo
fargoOP•4w ago
A pic? Like the actual board how its wired or just the board?
miklschmidt
miklschmidt•4w ago
Like the actual board, so i can check all the pin assignments, the model number, the chip numbers etc.
fargo
fargoOP•4w ago
OK, just so you know, I have 2 now, both have the exact same issue which one should I take a picture of, for me it dosnt matter
miklschmidt
miklschmidt•4w ago
Yep, just a pic of the current one (which to be fair gives you a different error)
fargo
fargoOP•4w ago
No, the errors are just different, depending on what I do 😉 Let me get you that pic
miklschmidt
miklschmidt•4w ago
the logs in the debug zip will show what's going on
fargo
fargoOP•4w ago
OK, I'll get right to it
fargo
fargoOP•4w ago
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miklschmidt
miklschmidt•4w ago
Now i just need the debug zip
fargo
fargoOP•4w ago
Standby
miklschmidt
miklschmidt•4w ago
I'll have to look into it later though as i've gotta go for a few hours.
fargo
fargoOP•4w ago
Sure. I have to reflash the board.
miklschmidt
miklschmidt•4w ago
Before you go do all of that please make sure you grab a debug zip after reproducing the errors you're getting If you shut down your pi, the logs will rollover
fargo
fargoOP•4w ago
I just reproduced the error. Where is the zip?
miklschmidt
miklschmidt•4w ago
perfect, there's a link in the sidebar of the configurator (ratos.local/configure)
fargo
fargoOP•4w ago
miklschmidt
miklschmidt•4w ago
This one has the IFCNT error on stepper_z1 (means the driver isn't responding) So all good I'll take a look
miklschmidt
miklschmidt•4w ago
You need to remove this
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miklschmidt
miklschmidt•4w ago
Besides that i don't see any configuration issues. Are all the driver jumpers set like the two middle ones in the above picture?
fargo
fargoOP•4w ago
Yes I have to remove the power jumper? Its been there since the beginning 😄 Now the board isnt powered?
miklschmidt
miklschmidt•4w ago
It connects the pi's USB 5V with the onboard 5V rail, it's just trouble.
fargo
fargoOP•4w ago
How do I power the board correctly?
miklschmidt
miklschmidt•4w ago
via 24v
fargo
fargoOP•4w ago
All connectors are attached but the board has no power?
miklschmidt
miklschmidt•4w ago
That's your power
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miklschmidt
miklschmidt•4w ago
huh? The board has no power without the jumper? That explains your driver problems
fargo
fargoOP•4w ago
yupp..
miklschmidt
miklschmidt•4w ago
is your PSU dead?
fargo
fargoOP•4w ago
Should I check my 24V wiring in that cas?
miklschmidt
miklschmidt•4w ago
yes And now i really gotta go 😂 Will check in on you when i'm back
fargo
fargoOP•4w ago
Lemme get my multimeter and check the PSU 😅 I will update you
miklschmidt
miklschmidt•4w ago
Could be a brown out / short somewhere in your 24V wiring
fargo
fargoOP•4w ago
It very well could be the PSU..
miklschmidt
miklschmidt•4w ago
If you board isn't getting powered, that's the most likely culprit for sure anywhoo, ttyl good luck for now!
fargo
fargoOP•4w ago
It's the PSU. The one thing I assumed was OK and never checked 🙈 And you found it within 5 Minutes 😅 Any suggestions for a good quality replacement?
miklschmidt
miklschmidt•4w ago
Meanwell! 🙂
archen
archen•4w ago
Get a meanwell UHP-series. It's cooling is passive, its so nice to not hear the damn fan

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