Page 1 of 1

Stepper motors just stopped working?

Posted: Mon Aug 13, 2018 10:22 am
by mathewbeall
Hi Folks - I fired up my Rostock MaxV3 last night to print some stuff after it being off for about a month.... loaded the G-code file, went to print it...

The bed heated up, and then the extruder - and then.... nothing..... when I went to the console (I use octopi) it looked like it was sending the right commands, but there was no movement.

OctoPi had just upgraded, and seemed like it had an issue - so I went and downloaded a brand new version of OctoPi and got it up and running - same issue.

I then went to the menu on the screen of the Rostock itself and went to Advanced->Calibration and tried it that way - again, absolutely no movement from any of the motors.

Any idea what would have gone wrong with it just sitting there or what I can check?

Thanks,

Matt

Re: Stepper motors just stopped working?

Posted: Tue Aug 14, 2018 8:43 am
by geneb
Check the fuses on the RAMBo. It's going to be one of the micro fuses - I don't recall which one though.

g.

Re: Stepper motors just stopped working?

Posted: Tue Aug 14, 2018 11:15 am
by mathewbeall
Thanks - I see in a picture two small ceramic 5a fuses... I will take the out tonite and test them and let you know! I know the larger car type 15a fuse is good.

Matt

Re: Stepper motors just stopped working?

Posted: Thu Aug 16, 2018 10:46 am
by geneb
Keep in mind that you need to remove those fuses to test them - you can get a false "good" if you test them while they're installed.

g.

Re: Stepper motors just stopped working?

Posted: Thu Aug 16, 2018 11:23 pm
by mathewbeall
Fuses did check out - but I replaced them anyways - still no stepper motor action.

Anything else I can check? I doublechecked all the wire harnesses - everything is in tight (and remember, it was just sitting there for about 3 weeks doing nothing when it decided not to work)... everything else seems to work - heated bed, octopi, extruder heating up, etc.

Thanks,

Matt

Re: Stepper motors just stopped working?

Posted: Fri Aug 17, 2018 8:14 am
by geneb
You might want to check the screw terminals on the power input connector. I'd also check the power supply output voltage.

g.

Re: Stepper motors just stopped working?

Posted: Sun Aug 19, 2018 10:43 pm
by mathewbeall
All seems good - I have a note out to matterhackers.com to see if they do any service/support.

Matt

Re: Stepper motors just stopped working?

Posted: Mon Aug 20, 2018 1:12 am
by rootboy
Sounds like something wonky in the config. Have you tried controlling it from different software?

Re: Stepper motors just stopped working?

Posted: Mon Aug 20, 2018 9:07 am
by mathewbeall
I usually use octopi - I completely blew it away, and also just tried to home the device (or calibrate it) from the front panel.

Re: Stepper motors just stopped working?

Posted: Mon Aug 20, 2018 9:34 am
by rootboy
Hmmm, I think that it's something in the firmware, which would explain why a fresh install of Octopi wouldn't fix it. What controller does the V3 use, and what firmware (and version) are you running?

Re: Stepper motors just stopped working?

Posted: Wed Aug 22, 2018 4:32 pm
by mathewbeall
I would have to check - but it is whatever it came with 8 months ago..... and it has been working perfectly fine the entire time - with no change to the firmware...

Do the stepper drivers go out? I see on the rambo mini they talk about a better design with heatsinks to "never have a stepper driver failure again..."?

Matt

Re: Stepper motors just stopped working?

Posted: Thu Aug 23, 2018 8:28 am
by geneb
At this point I would contact support.

g.

Re: Stepper motors just stopped working?

Posted: Thu Aug 23, 2018 9:20 am
by mathewbeall
Yup - already have a case open with them.

Re: Stepper motors just stopped working?

Posted: Fri Aug 24, 2018 7:36 am
by geneb
Please post an update here when it's resolved. I'm curious to see what the issue is.

g.

Re: Stepper motors just stopped working?

Posted: Fri Aug 24, 2018 10:58 pm
by mathewbeall
So - i figured it out ... THIS was weird! I was looking at this picture below to try and figure out if I could somehow test the voltage going out of the RAMBO into the stepper motors... and I noticed over on the right - the - and + for "Motors and Logic" - so I swing the multimeter over there to see if I was getting power, and voila - that was it! the positive terminal had somehow become loose and that wire wasn't making contact anymore.

I am happy - that was driving me crazy! Neither matterhackers nor seemecnc suggested - hey, make sure the power going into the board is all solid. I guess that is such a beginner item they didn't even bother to ask.

There you go! Easy fix!

FIAZ7XBI327MJR1.LARGE.jpg

Re: Stepper motors just stopped working?

Posted: Sat Aug 25, 2018 5:26 pm
by Xenocrates
I do believe Geneb mentioned checking it earlier in the thread, but the issue with a loose connection is that it can be intermittent. It's also a bit surprising that it didn't kick something back in octopi, as that should have prevented the board from powering on.

Re: Stepper motors just stopped working?

Posted: Sat Aug 25, 2018 8:33 pm
by mathewbeall
Well aren't you absolutely right! I did check the PSU voltages, but totally missed the part where he said to check the jumper block.

Strange indeed - I can only assume it was making enough contact to power the logic of the board, but not enough for the stepper motors.

Matt

Re: Stepper motors just stopped working?

Posted: Sun Aug 26, 2018 12:13 pm
by geneb
*looks up, whistles innocently*

:D

I'm glad you finally got it sorted.

g.