stuttering steppers & 3mm filament July 02, 2014 05:42PM |
Registered: 9 years ago Posts: 12 |
Re: stuttering steppers & 3mm filament July 02, 2014 06:42PM |
Admin Registered: 12 years ago Posts: 1,063 |
Re: stuttering steppers & 3mm filament July 03, 2014 03:13AM |
Registered: 9 years ago Posts: 12 |
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thejollygrimreaper
how much current are you putting into it? the stepper motor on the bulldog can take up to 1amp
Re: stuttering steppers & 3mm filament July 04, 2014 08:28AM |
Registered: 9 years ago Posts: 12 |
Re: stuttering steppers & 3mm filament July 04, 2014 09:08AM |
Registered: 10 years ago Posts: 474 |
Re: stuttering steppers & 3mm filament July 04, 2014 10:06AM |
Registered: 9 years ago Posts: 12 |
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cnc dick
I am not a expert with PLA but some of the new stuff as a very high temperature if it is this a fairly new role of filament I've heard of a manufacturer that suggests 235 c plus check to make sure it is PLA is what it says I've heard of some roles marked wrong and actually it was ABS. I probably would run new motor wires just to make sure that there is not a half broken wire inside insulation. When you changed extruders from the wades to the bulldog did you change your firmware steps per millimeter you definitely need to do this if you did not you are trying to push the filament way too fast. Check the firmware just to make sure that somehow it hasn't changed
Re: stuttering steppers & 3mm filament July 04, 2014 02:04PM |
Registered: 10 years ago Posts: 474 |
Re: stuttering steppers & 3mm filament July 04, 2014 02:49PM |
Registered: 9 years ago Posts: 9 |
Re: stuttering steppers & 3mm filament July 05, 2014 07:01AM |
Registered: 9 years ago Posts: 12 |
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Eugie_A_Deef
What about speed? How fast do you print? I don't know exactly, what torque this motor has, but usualy Nema17 has 1, 5-4, 4 kg*cm. And (in my experience) for direct extruders it isn't enough for extrude 3mm filament faster 20-30mm/min.
Re: stuttering steppers & 3mm filament July 05, 2014 04:56PM |
Registered: 9 years ago Posts: 9 |
Re: stuttering steppers & 3mm filament July 05, 2014 05:03PM |
Registered: 9 years ago Posts: 12 |
Quote
Eugie_A_Deef
P.S. Pardon for my bad English, it isn't my mother language.
Re: stuttering steppers & 3mm filament July 05, 2014 05:45PM |
Registered: 9 years ago Posts: 9 |
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RepRapper_1987
...will be able to test the RepRap in about an hour and let you know - currently I guess I destroyed something on the (Sanguninololu) electronic board as EVERY stepper in combination with EVERY Polulu stuttered.
Re: stuttering steppers & 3mm filament July 05, 2014 05:54PM |
Registered: 9 years ago Posts: 12 |
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Eugie_A_Deef
I don't think so. If you broke controllers output leg, step motor wouldn't work at all. There isn't analog electronic parts on Sanguinolulu for demonstrate such vague symptoms. I'm pretty sure that it's Polulu problem. I've seen similar. (
Re: stuttering steppers & 3mm filament July 05, 2014 06:12PM |
Registered: 9 years ago Posts: 9 |
Re: stuttering steppers & 3mm filament July 05, 2014 06:21PM |
Registered: 9 years ago Posts: 12 |
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Eugie_A_Deef
Ok! Turn Polulu potentiometer down to the bitter end, and then turn it backward to quarter of a full turn and try again.
Do you have a multimeter? Can you check resistance in a motor winding?
Re: stuttering steppers & 3mm filament July 05, 2014 06:43PM |
Registered: 9 years ago Posts: 9 |
Re: stuttering steppers & 3mm filament July 05, 2014 07:54PM |
Registered: 9 years ago Posts: 12 |
Quote
Eugie_A_Deef
So, If I'm thinking right, operating amperage is ~1amps. This corresponds to the specs. So, don't turn Polulu potentiometer more than half-turn from mininum.
Do you have a fan on your board for Polulu cooling? If not just do a simple test - take any fan, start extrusion and direct the airflow to Polulu. If you will see changes, then my version is right. If you will see no changes then we will think more.
#######
EDIT
# If it isn't a Polulu problem, I'm afraid that it's a mechanical failure of the motor or gear box.
Re: stuttering steppers & 3mm filament July 05, 2014 08:46PM |
Registered: 9 years ago Posts: 9 |
Re: stuttering steppers & 3mm filament July 07, 2014 05:55PM |
Registered: 9 years ago Posts: 12 |
Quote
Eugie_A_Deef
Keep on a max microstep. In my experience, Polulu willn't stay cooler if you reduce the microstep. It seems that his chip's temerature significantly depends from amperage only. If the motor will stutter again, just reduce amperage a bit.
Good luck
Re: stuttering steppers & 3mm filament July 08, 2014 09:41AM |
Registered: 9 years ago Posts: 9 |
Re: stuttering steppers & 3mm filament July 08, 2014 04:05PM |
Registered: 9 years ago Posts: 12 |
Quote
Eugie_A_Deef
Try to search a right amperage. Turn off a fan, turn on power on motor. Just power on... m-m-m... I don't know how this mode called in English... "hold mode", maybe... when you keep the coils powered but do not turn the motor. After a while you will hear a distinctive rhithmic tapping - it's working a termal protection, and it's your "stutters" . Take a dieleictic screwdriver (I use a flat sharpened toothpick for this ) and carefully turn amperage potentiometer. If the frequency of tapping become more, then amperage is increasing, if less - amperage is decreasing. Achieve for no tapping, or very infrequent. It will a right amperage for your stepmotor. You still need a fan for protect Polulu from environment temperature fluctuation, but it must work well.
Re: stuttering steppers & 3mm filament July 08, 2014 06:41PM |
Registered: 9 years ago Posts: 9 |
Re: stuttering steppers & 3mm filament July 09, 2014 02:55PM |
Registered: 9 years ago Posts: 12 |
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Eugie_A_Deef
Hm... I'm afraid, I haven't more thinks now. I'm sorry :-( If I will have an idea, will wright about. What the motor model Buldog has? Exactly, if it possible. If I will can find specs, maybe, I will get ideas...
Re: stuttering steppers & 3mm filament July 09, 2014 04:59PM |
Registered: 9 years ago Posts: 9 |