Unanswered R1 stops 2 lines into a print?

Yet another issue here haha.

Went to do a print today, only to find that one of my R1's is refusing to print. Once everything heats up, it begins the print, but after about 2 lines of filament, it just stops. the print progress bar continues as normal on mattercontrol until the print "finishes". I've tried a number of objects, all with the same result. and can move the head around through the software like normal when not doing a print.

Any help would be greatly appreciated; Let me know if there's any more info I can/shoud provide!

EDIT: more recent issue posed in replies below.

 

Thanks for the response!

1 - I'll swap out the cable from my other R1 once its print is finished to see if it's a cable problem
2 - don't have SD slots on my printers.
3 - yep, planning on moving to something better soon, but haven't had the time yet.

 

Unless Robo removed the feature, you have one. It's on the right side of the printer not too far from the opening from the USB port.

It is, admittedly, easy to miss since there isn't a big "SD CARD GOES HERE" label or anything.

If your printers are indeed without one, you'll need to complain to actual Robo support about it.

 

Clarify - it's a mini SD card slot. Maybe that is why you aren't seeing it

 

Very delayed response to this; the problem went away on its own before any further troubleshooting, but seems to have come back again now.

I narrowed it down to a temp drop error using the terminal; basically, once the print starts, the hotend temp drops drastically; roughly 5deg per second. I haven't been able to figure out WHY this happens though; last night I took the printer apart looking for loose connections (Found none) and to ensure that the thermistor was snug in it's place, which It was. all wires, circuit boards, etc, look to be perfectly fine, so I'm confused as to what is causing this.

basically:
-start print
-bed heats up
-hotend heats up
-auto-level happens
-print starts
-hotend temp drops drastically
-printer just sits until it thinks the print is done or it's stopped.

I'm going to check the resistance of the thermistor to ensure that it's 100kohms as it should be, but I don't suppose anyone has any troubleshooting steps beyond that?

EDIT: I've also tried multiple cables with the same result.

 

print with your computer on mattercontrol and go to the gcode console. while printing check for any errors and also check the temperature of your extruder.
Then post here what you found out (or at least post the log of the gcode console)

 

You have the same symptoms that I had after I installed the E3D V6 hot end. The heater worked fine until it started extruding, and then it couldn't keep up. I replaced the heater with a 40watt heater from Amazon, and that fixed it.


Sent from my iPhone using Tapatalk

 

Was super busy yesterday and had no time to do any troubleshooting, but just did so now. Swapped the thermistor with one from another robo, but that didn't solve the problem (unless that thermistor was damaged too possibly?).

@ janot, see video below. print starts, temp drops rapidly, and printer stops. PC I use to control the printer is a not hooked up to internet xp box, so filming the screen was easier then getting recording software on it.



Also noticed that there was a "temp reset" error after the bed finished heating,but it then went on to start the print as in the video.
Pic:



@ ben, that's a good point, hadn't considered that it could be the heater itself. I was able to easily extrude 300mm of filament by manually heating>extrude without any temp drops, so I dunno what's up there. If worst comes to worst I may just buy an entire new hotend and then have spare parts for the future.

 

Found my multimeter and measured the resistance of thermistor; it was 140kohms (room temp was 17ish celcius). I believe they're supposed to be 100k, but vary sometimes, so any thoughts as to whether or not that's a acceptable variance?

 

Thanks for the detailed response! auto-level temp drift + not powerful enough heater is looking like the issue here, and would explain why the problem didn't rear it's head until winter.


The link you posed doesn't ship to Canada, but I found some on the .ca site which should be comparable :
http://www.amazon.ca/Ceramic-Cartri...=8-4&keywords=40w+3d+printer+heater+cartridge


In the meantime, is there any way to force the software to keep the temp up while calibrating to see if I can get some prints in? even pausing once it's calibrated, or something?

Thanks again!

 

Thanks for that! changed it to 240.


The issue keeps getting weirder and weirder now - went to do a print to test the setting change, and the hot end temp wouldn't go above about 56c when it was heating up the bed. stopped the print, preheated the bed manually, and it heated right up normally. started the print again with hotend at temp already, and as usual, the temp started to drop once the print began.

I paused the print before the temp reached the point where it'd auto-stop, and the hotend climbed back to 240 as it should; I then resumed the print and it started printing just fine and holding steady at 240. that print is currently going, will update if/when it completes.

if the hotend isn't powerful enough to cope with the reduced temps (or is just underpowered in general and dying), I don't see why it would start holding to temp all of a sudden after just a mere pause (when going back under load you'd think its temp would fall again, right?). Even less sure as to what the problem is than when I started haha.



Thoughts?

 

Yep, have a pack of thermistors in the mail as of yesterday, and going to order the heaters today.

the rubber boot that held the thermistor in broke a while back, so I used some high-temp RTV to hold it in, which worked nicely. I opened up the printer to check all boards for loose wires a couple days ago, but found nothing wrong. will try wiggling wires again just to check.


And yep, no longer under warranty - this robo was purchased in march 2015.

Thanks again for all the help!

I'll update this when the heaters and thermistors come in.