Fried my duet ![]() May 21, 2014 02:13PM |
Registered: 11 years ago Posts: 13 |
Re: WARNING (maybe) May 21, 2014 03:09PM |
Registered: 11 years ago Posts: 9 |
Re: WARNING (maybe) May 21, 2014 03:23PM |
Registered: 11 years ago Posts: 1,230 |
Quote
CJansen
...then power off/power on and home axes again restart print and first layer ok on all 4 parts, then all the sudden it stopped then i saw smoke from behind the printer and my duet died 21.05.2014 19:32, suddenly with no warning...
Re: WARNING (maybe) May 21, 2014 03:31PM |
Registered: 11 years ago Posts: 13 |
Quote
ormerod168
Oh so sad so sad, only 3kg old and then this, its always the young ones innit...(sniff) are you sure it's quite dead?...could be stunned!...or pining for the fjords??
...oh draaat!, you are in Norway, wall to wall fjords! - Waaaa....(sniff) I'll light a candle - no I'll print a bloody candle, with 59b-DC42 firmware and respectfully pause 5 minutes half way through the print and restart - anything for a fellow brother in ormerod, anything!
...hope you don't take offense, only trying to cheer you up mate :-), lets see what the forensic might show
Erik (sniff)
Re: WARNING (maybe) May 21, 2014 03:52PM |
Registered: 11 years ago Posts: 14,686 |
Quote
Prefinity
When ONLY usb cable connected with everything including sd card removed, the Sipex 2525A-2E IC seems to rise rapidly in temp to the point which it is painful to the touch. I took an IR thermo which scanned the IC at 72c just 10 secs after micro USB connected.
Quote
Now your post makes me wonder if the newest firmware might be the cause, Im gonna stay off trying to troubleshoot just in case..
Re: WARNING (maybe) May 21, 2014 04:10PM |
Registered: 11 years ago Posts: 13 |
Re: Fried my duet ![]() May 21, 2014 04:28PM |
Registered: 11 years ago Posts: 859 |
Re: WARNING (maybe) May 21, 2014 04:33PM |
Registered: 11 years ago Posts: 14,686 |
Re: WARNING (maybe) May 21, 2014 04:46PM |
Registered: 11 years ago Posts: 13 |
Quote
dc42
Very strange, frying in the middle of a print like that with no USB connected. Does your 2525A chip get hot too, like Prefinity's? Or does the SAM3X smoke so fast that you can't tell?
EDIT: also worth trying with just the USB connected, like Prefinity. If the SAM3X doesn't heat up so fast, that could indicate that 12V is getting somewhere it shouldn't.
Re: Fried my duet ![]() May 21, 2014 05:47PM |
Registered: 11 years ago Posts: 14,686 |
Re: Fried my duet ![]() May 21, 2014 06:14PM |
Registered: 11 years ago Posts: 1,230 |
Quote
Hi all
I really need your help, to collect some data, to try and work out what is going on with a spate of recent Duet failures. I am not apportioning blame, and it will not affect the state of any warranty claims. I just need to understand what's going wrong, so we can fix it. This relates to a number of emails I have received recently, but I have also seen in comments in the forum of other, similar problems. Examples of these failures have been cited in this thread [forums.reprap.org] by PhilipTheMobster, tat88 (maybe), robbycar, emmander, TONYR, OttoES and possibly quite a few others, and some who don't post here but have contacted me by email.......
Ian
RepRapPro tech support
Re: Fried my duet ![]() May 22, 2014 07:41AM |
Registered: 11 years ago Posts: 2,472 |
Yes, it sounds plausible, but I am not quite convinced. I've made some pretty heath-robinson lash-ups with mixed signal and heavy current switching via long multi-core cables going directly to CPU and other types of chip input, and whilst they frequently cause firmware crashes and other erroneous operations, I have never experienced a case where an induced spike actually fried a chip - though static discharges have sometimes done so, (which I suppose could be a possibility), and I once blew a circuit with induced RF from a 100W HF transmitter aerial inches away from a signal cable. I'm not saying that it cannot happen, but IME it is exceedingly rare. There is capacitance across the loom wires, but also an inductance. I also don't trust 'scope traces to give accurate voltage readings of switching transients. Even using a low-capacitance differential amplifier probe on a DSO, I have experienced such variable results after simply moving the wires around or unplugging the 'scope from the mains and running it on its internal battery that I have disregarded all the traces wrt their quantitative indications. And I have also experienced the effect where a solid fault goes away and the circuit works perfectly as soon as you clip on the 'scope probe.Quote
dc42
I've been thinking about this and I think I may have found a possible cause (it's only that, the actual cause could be something entirely different). ...
Re: Fried my duet ![]() May 23, 2014 11:04AM |
Registered: 13 years ago Posts: 1,611 |
Re: Fried my duet ![]() May 23, 2014 12:57PM |
Registered: 11 years ago Posts: 13 |