1 Topic by dres.mat

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Topic: Bent Barrel

I am a new user of filastruder and after trying to work with PLA and some powder aditive i think the mix got too viscous that the auger made the barrel turn aprox. 180 º and then the motor stopped. After raising the temperature i turned on the motor again but it didnt start. Today i took apart my filastruder and the motor Works but i hear an ugly noise coming from it althought it looks like it turns just fine. However when i tried to separate the auger from the barrel after heating it over 200 ºC the auger wont come out and i noticed the barrel looks a Little bent. Is it possible that the motor torque has bent the tube?

2 Reply by elmoret

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Re: Bent Barrel

Yes, it is possible for the gearmotor to bend the barrel, but the stall protection board if set up correctly will limit motor torque below damaging levels.

I would recommend reviewing the instructions on setting up the stall protection board. You can check the settings by connecting the the heater directly to the to the output terminals of the stall protection board, in place of the motor. Tapping the OUT button will cycle through the following measurements: Input voltage, output voltage, output current, output power, auto (cycles through all 4 every few seconds). You should see between 11.5v and 12.5v, and between 1.5A and 1.7A.

New barrels can be purchased using the contact page on the Filastruder site. It is also possible the gearbox sustained damage, it would be a good idea to open the gearbox and inspect for damage.

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3 Reply by dres.mat

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Re: Bent Barrel

how can i set up the output current and power to  be between 1.5A and 1.7A?

4 Reply by carl_m1968

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Re: Bent Barrel

dres.mat wrote:

how can i set up the output current and power to  be between 1.5A and 1.7A?

The manual does cover setting the current limit which is what you are asking.

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5 Reply by dres.mat

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Re: Bent Barrel

carl_m1968 wrote:
dres.mat wrote:

how can i set up the output current and power to  be between 1.5A and 1.7A?

The manual does cover setting the current limit which is what you are asking.

you mean with the 7 turns clockwise to the CC adjustment? i did that and then added 2 more because eventually i would get the red LED light althought at times i would still get readings over 2.0A.

6 Reply by elmoret

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Re: Bent Barrel

Anything over 2 amps is getting in the territory of bending the barrel. The red LED indicates that current is being limited to prevent damage.

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7 Reply by dres.mat

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Re: Bent Barrel

elmoret wrote:

Anything over 2 amps is getting in the territory of bending the barrel. The red LED indicates that current is being limited to prevent damage.

So what do i do to prevent it to go over 2 amps?

8 Reply by dres.mat

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Re: Bent Barrel

Also im planning on getting a spare barrel...do you recomend to screw it to the base to the limit to avoid any eventual rotation?

9 Reply by elmoret

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Re: Bent Barrel

The CC setting is what adjusts the current limit. You can check what it is set to with the steps in post 2.

Rotation of the barrel doesn't hurt anything, and assuming the barrel is tightened properly during assembly and the motor isn't overloaded, the barrel won't rotate.

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10 Reply by dres.mat

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Re: Bent Barrel

So if i already added 2 extra turns and i still get more than 1.7A should i give it more turns?

11 Reply by elmoret

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Re: Bent Barrel

No, I would not recommend adding more turns. If you're exceeding 1.8A then you're exceeding the maximum design load.

ABS for example extrudes at about 1A.

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12 Reply by dres.mat

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Re: Bent Barrel

elmoret wrote:

No, I would not recommend adding more turns. If you're exceeding 1.8A then you're exceeding the maximum design load.

ABS for example extrudes at about 1A.

Then what do i do?

13 Reply by genesat1

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Re: Bent Barrel

Can you take a photo of your barrel? To see how much 'a little bent' is?  Did you turn it on when you didn't have it heated at all?

14 Reply by dres.mat

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Re: Bent Barrel

genesat1 wrote:

Can you take a photo of your barrel? To see how much 'a little bent' is?  Did you turn it on when you didn't have it heated at all?

i disassembled my filastruder and  checked the barrel in a lathe and is not entirely straight, the auger is still able to rotate but i dont want to risk it so i will order a spare barrell... no i didnt turn it on when it wasnt heated, a mix of PLA and some powder additive got so viscous it made the barrell rotate along the auger untill it stopped and i Heard a bad sound from the motor or the hex socket (im not sure) so i turned it off.

My main concern now is why i get over 1.8A (even over 2.0A) if my CC settings are correct, shouldnt the motor stop and not keep working?

Also, the barrel comes already tightened to the flange but should i tighten it even more than already is?

15 Reply by elmoret

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Re: Bent Barrel

dres.mat wrote:

My main concern now is why i get over 1.8A (even over 2.0A) if my CC settings are correct, shouldnt the motor stop and not keep working?

Also, the barrel comes already tightened to the flange but should i tighten it even more than already is?


Probably because the settings aren't correct. I posted in the first reply to this thread a safe way to check the settings.

No need to tighten the barrel further, if it needs to be tightened further the motor will do that (rotation is in the direction that tightens the barrel).

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16 Reply by dres.mat

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Re: Bent Barrel

elmoret wrote:
dres.mat wrote:

My main concern now is why i get over 1.8A (even over 2.0A) if my CC settings are correct, shouldnt the motor stop and not keep working?

Also, the barrel comes already tightened to the flange but should i tighten it even more than already is?


Probably because the settings aren't correct. I posted in the first reply to this thread a safe way to check the settings.

No need to tighten the barrel further, if it needs to be tightened further the motor will do that (rotation is in the direction that tightens the barrel).

I know how to check the settings, what i dont know (or at least im not sure of) is how to get them right... i did the 7 turns and the additional 2 for the CC settings, is there another way to limit the output current?

17 Reply by elmoret

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Re: Bent Barrel

Try using the steps in the second post, and reduce CC until you see 1.6A.

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