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UMO+ resets after printhead fan starts

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Dear Ultimaker colleagues,

First of all "Hello from Austria", since that is my first post ;-)

I've just finished my UMO+ and expirience a problem to which i find no answer in the support section:

When printing the printer works perfect for the brim and first layer, but approximately 5 seconds after the fan starts the whole UMO+ seems to reset (Ulticontroller goes blank, restarts, shows SD Card Ready, print stoppen).

I now disconnected the fan from the board and print without fan and it works fine.

To me it seems as if the power safety resets the board. I also retried to plugin the fan, but then i've the same reset again.

Newest firmware is installed.

Do you have any ideas?

Thank you for your help!

Rgds Vinc

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So the fan starts up and spins as it should before the machine resets? I would've suspected a short in the fan, but if it actually spins up and works first that sound strange (unless the movement of the head causes the short after a while). I don't suppose you have another fan laying around to test?

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Yes, the Fan starts, then after 5 seconds comes the reset. A short due to movement of the Head? Hmm.. I'll look into that..

 

So the fan starts up and spins as it should before the machine resets? I would've suspected a short in the fan, but if it actually spins up and works first that sound strange (unless the movement of the head causes the short after a while). I don't suppose you have another fan laying around to test?

 

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FYI: I just manually switched on the fan-works without fault, also when printhead is moved manually.

Thereafter activated heated bed and nozzle together with fan - no fault.

Therafter printed without fan- no fault.

Activated fan during print- 3seconds then reset, arghhh!!

 

Yes, the Fan starts, then after 5 seconds comes the reset. A short due to movement of the Head? Hmm.. I'll look into that..

 

So the fan starts up and spins as it should before the machine resets? I would've suspected a short in the fan, but if it actually spins up and works first that sound strange (unless the movement of the head causes the short after a while). I don't suppose you have another fan laying around to test?

 

 

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Can you check with another sd card? Or another file?

I had once a problem like that but was a dead heater after a a lot of mods and a lot of tinkering the machine. Can you check also the feeder cables, you can heat to 170C or more and go Prepare/Move axis/Move 0.1/Extruder to make the extruder push filament. Just to check if that triggers the reset.

Also I would reinstall the latest firmware before doing more tests (just in case) and also after that try to do Control/Reset factory default settings (or something like that).

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Okay, i rerouted the fan cable- no change. Thereafter tried to reproduce the failure by moving the axles - but the failure is not reproducable, it's not connected to a specific axle. And it one time shut down without fan when setting the nozzle temperature to a higher setting. For me it seems as if the system as whole is at the limit of the safety of the board and the fan "pushes it over". Perhaps the heater cartridge uses to much energy?

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Okay, when i set a higher temperature during print- reset. Lowering isn't a problem.

That would be consistent with the fan, because the fan will cool the nozzle and the heater will therefore switch on some seconds after the fan. And then ....restart.

So i think the heater cartridge takes to much power.. Since the UMO+ is brandnew i'll try to contact the Ultimaker support on monday...

Rgds Vinc

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Hey guys,

The finder relais on the mainboard is switching and causing the reboots when using to much power. Meaning e.g. without heated bed the printer works fine, when i switch it on then reboot.

Is anybody out there who had the same problem? I triple checked all the wirings and i'm a hundred percent sure they're not the rootcause. I think the mainboard or the heater cartridge have a defekt. What so you think?

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Hey guys,

The finder relais on the mainboard is switching and causing the reboots when using to much power. Meaning e.g. without heated bed the printer works fine, when i switch it on then reboot.

Is anybody out there who had the same problem? I triple checked all the wirings and i'm a hundred percent sure they're not the rootcause. I think the mainboard or the heater cartridge have a defekt. What so you think?

I (unfortenately) have the same problem. It occurs to me after I swapped out my heater Cartridge... I don't think it is a broken PCB. My guess is that the printer is consuming more power. That means, that the PSU or the heater-cartridge is the wrong one. (I got an UM2 one with 40Watts and 24Volts -> but it should work anyways) Im going to contact my german reseller tomorroe and I'm going to see, what they can say... Have you fixed your problem?

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