"Crash detected" repeatedly whilst printing  

Re: "Crash detected" repeatedly whilst printing

firmware version?
octoprint?

I seem to remember this was a known issue a while back but not sure of the specifics. I've had mine turned off forever anyway due to stealth mode.

Re: "Crash detected" repeatedly whilst printing

Yeah, the Y axis does have an issue which is currently being worked on.

It will be resolved soon.

Peter

Re: "Crash detected" repeatedly whilst printing

I am having the same problem. Firs print was a bit disappointing... 🙁
FIRMWARE 3.2.0 updated last night.

Re: "Crash detected" repeatedly whilst printing

I am going to make a guess based on the symptoms and my understanding about how crash detection works.

A crash is detected as a spike in the current required to move the stepper motors. Maybe there is too much friction in the X or Y bearings causing it to think there is a crash. Can you remove the belts and see if the rails move smoothly in both directions?

Steve

Re: "Crash detected" repeatedly whilst printing

I talked to support and there answer was we know about the issue, turn off the crash detection. 😐

RE: "Crash detected" repeatedly whilst printing

Appears to still be an issue. I just purchased my first 3D printer (MKS3) and was experience crashes on every print. Found this article in the forum and after turning off crash detection, I was able to complete my first prints.

RE: "Crash detected" repeatedly whilst printing

Posted by: @scockman

Appears to still be an issue. I just purchased my first 3D printer (MKS3) and was experience crashes on every print. Found this article in the forum and after turning off crash detection, I was able to complete my first prints.

Note the last post before yours was May 2018 ... the info is stale ... and these days (late 2019) turning off crash detection is like hiding your head in the sand: it just keeps you from knowing you really do have a problem in the build of your printer, and later as the problem gets worse, you'll probably fight trying to understand what is happening before the crash warnings won't be there to let you know.

RE: "Crash detected" repeatedly whilst printing

@scockman

I received my MK3s a week ago and had the same problem. Even though  the assembly instructions say the bearings don't need to be greased, they do. Take it back apart and put grease INSIDE the bearings, hold your finger over the bearing end and push it on the shaft forcing the grease into the ball tracks. That makes a difference in the noise and has eliminated "crashes" on my machine.

RE: "Crash detected" repeatedly whilst printing

There are two main reasons for frequent “crash detected” messages.  #1 mechanical issue.  #2 hot stepper drivers (Control board).  Mechanical issues are more common.  Bearings, lube, belts rods etc..  but if none of those are the issue then add a 5 volt 30 mm fan inside the case to cool the small chips on the control board.  The ones near where the stepper wires plug in.  Cooling them off will stop them from thinking there is a Fake crash.

RE: "Crash detected" repeatedly whilst printing

I started having this problem today.  I am trying a couple of fairly large prints and this happens just after the base layer or sometimes on the base layer.

Is there anything new on this?

RE: "Crash detected" repeatedly whilst printing

@sledjunk

Did you check if all axis move without getting stuck, shutdown printer, and move slowly the axis, and see if you feel something.

Do this slowly because the motor makes the printer getting power of the motor and could damage if you go to fast.

Did you do maintenance on your machine, every 2 rolls of filament put a drop ff oil on the rails/bearings.

Check if you do z-calibration if left and wright hits the top at the same time.

RE: "Crash detected" repeatedly whilst printing

@peter-m26

My machine is new and within the first week of use.  The z calibration is hitting the top at the same time.  However, after doing more reading last night, I did see that free movement could be the issue and will be checking that this morning.  I saw that there is a way to see the belt tension on the LCD screen.  The other suggestion that I saw is that the plastic nuts on the Z motors may be screwed down to far.  Some things to check and see if that helps.

Thanks for the suggestion.

RE: "Crash detected" repeatedly whilst printing

OK, update.

I have loosened both the X and Y belts and I seem to have eliminated the X crashes.  However, I am still getting Y crashes and they seem to happen at the 45 degree mark to the furthest right and closest left.  The print is a funnel about 6 inches in diameter and the crash happens every 4 to 5 times around.  Both the bed and the extruder slide freely along when the printer is tipped to about 45 degrees.

I have run the x y z calibration again and still no luck.

Is it possible that the gcode has a flaw in it?  I produced it with prusaslicer from an stl file from thingiverse.

As mentioned earlier, I am new to this and kind of lost.

RE: "Crash detected" repeatedly whilst printing

Another update.  I turned off crash detection and the print is progressing.  Another 6 hours and it will be done and we'll see how it goes.  I would really like to figure out why it is crashing.

RE: "Crash detected" repeatedly whilst printing

Hi @sledjunk 

Were you able to fix your mk3s? I am also having the same problem as you, brand new printer ~2 weeks old. Any update would be very helpful; thank you!!

RE: "Crash detected" repeatedly whilst printing

@sarahvanbelleghem11

Yes, I have finally got things settled down.  I still have the odd crash, but not too bad.  My main issue was with a new spool (mfr) of PETG and my lack of experience.  The PETG kept balling up and forming blobs, which then caused the crashes.  What I found was that my hotend was leaking above the heating block.  I dismantled the whole thing, cleaned it and reassembled it according to the instructions on the E3d website.  I made sure that the nozzle was tight against the heatbreak.  This solved most of the problem so that I could adjust the live Z so that the first layer bonded properly to to the steel sheet.  Once this worked, the rest started working quite well.

RE: "Crash detected" repeatedly whilst printing

Also, I had to adjust my settings for this PETG.  I increaded bed temp to 85 for the first layer, and the nozzle temp to 245 throughout.  The biggest factor seemed to be to slow the print speed on the first layer to 20%.  This seems to allow the first layer to really get pressed into place and stick without getting dragged by the nozzle.

All things I learned from reading this forum, so a big Thank You to all who contributed.  A lesson to other newbies, like myself, is to not be afraid to ask questions.  It is obvious that there are some very knowledgeable people on here who are willing to help.

RE: "Crash detected" repeatedly whilst printing

Well.  I did a lot more research on this and it turns out that the motor temp does affect crash detection as well.  So the motor temp needs to be regulated as well for consistent results.  My fan in the controller box has helped a lot.  I get fewer crashes than I had before but it is not reduced down to 0.

Here is a link to DUET documentation.  Different company, different mother board but the concepts are all the same.  https://duet3d.dozuki.com/Wiki/Stall_detection_and_sensorless_homing

Open the page and press CTRL - F to search for the words "Motor Temp".  You will find this "The stall detection threshold varies a little with motor temperature, therefore the motor temperatures must not be allowed to vary widely."

RE: "Crash detected" repeatedly whilst printing

Posted by: @mordiev

There are two main reasons for frequent “crash detected” messages.  #1 mechanical issue.  #2 hot stepper drivers (Control board).  Mechanical issues are more common.  Bearings, lube, belts rods etc..  but if none of those are the issue then add a 5 volt 30 mm fan inside the case to cool the small chips on the control board.  The ones near where the stepper wires plug in.  Cooling them off will stop them from thinking there is a Fake crash.

Thank's a lot Mordiev. Your solution helped me a lot. I also reported your solution in this post:

https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-user-mods-octoprint-enclosures-nozzles-.../crash-detections-now-i-have-the-printer-in-an-enclosure/