bera
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Post by bera on Sept 8, 2014 5:01:50 GMT -5
I recently replaced the endbell of my ak motor because the original broke, but when I pull the trigger, the motor lurches and that's it. Help! What could be causing this?
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T6e9a
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Post by T6e9a on Sept 8, 2014 7:05:49 GMT -5
Do all of the brushes move freely? And are they being pushed by a spring? Spinning the motor, does anything sound or feel off? Any grinding? Tough to turn? A picture of the end bell from a few different angles might be of use to help diagnose.
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bera
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Post by bera on Sept 8, 2014 7:08:35 GMT -5
One of the brushes is kind of tight. Would that cause it?
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T6e9a
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Post by T6e9a on Sept 8, 2014 8:06:20 GMT -5
It might be preventing it from connecting after the initial jolt. I would recommend trying to have it move more freely by either shaving off a little off the sides or trying to bend/adjust the housing to fit it and go from there.
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bera
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Im Turkish.
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Post by bera on Sept 8, 2014 9:16:01 GMT -5
I just diD. The motor turns, just not in the gun. For whatever reason, the motor just lurches inside of the gun. I'm using the standard 18:1 gear set.
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T6e9a
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Post by T6e9a on Sept 8, 2014 9:58:43 GMT -5
If you hook up the motor outside of the grip, and test it, does it spin freely?
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bera
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Post by bera on Sept 8, 2014 15:06:33 GMT -5
Yeah it does. Anyway, One of the motor connectors, the red one, doesn't go in all the way because there is a tiny thing stuck inside. Would that be it?
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Post by Stinger on Sept 8, 2014 15:36:52 GMT -5
...One of the motor connectors, the red one, doesn't go in all the way because there is a tiny thing stuck inside. Would that be it? No, you said that the motor "lurches." This means the electricity is getting to it. I believe you may have put the motor in backwards, causing it to try to spin the gears the wrong way. The "lurching" is a common symptom of this. Try putting the motor in the other way (rotate it 180 degrees on its armature axis). |
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bera
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Post by bera on Sept 8, 2014 17:46:25 GMT -5
Wouldn't the motor still turn the same way if I turned it around? Or did I understand wrong? Plus, the wiring gets really hot whenever I use it. Finally, my red wire is shorter than my black one so I might have trouble extending it forward if I turn the motor.
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Post by Stinger on Sept 8, 2014 19:16:29 GMT -5
Wouldn't the motor still turn the same way if I turned it around? Or did I understand wrong? Plus, the wiring gets really hot whenever I use it. Finally, my red wire is shorter than my black one so I might have trouble extending it forward if I turn the motor. Rotating the motor will move where the positive and negative contacts are, reversing the polarity of the motor. Unless you are sure positive is going to positive and negative to negative. Plus, the wiring gets really hot whenever I use it. That's normal when the gun is locked up and the motor is trying to spin. All the energy has to go somewhere so it ends up being resistance at the motor, which is heat, which conducts up the metal in the wires. If you are referring to regular use, it may still be normal. Finally, my red wire is shorter than my black one so I might have trouble extending it forward if I turn the motor. If you are absolutely sure the red is going to the positive side of the motor, then disregard what I said about rotating the motor. If ^ is the case, then your gearbox is likely locked up. Do you know how to pull the anti-reversal latch? |
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T6e9a
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Post by T6e9a on Sept 8, 2014 19:16:43 GMT -5
What he was meaning to say was try switching the polarities, as in put the black connector on the red motor tab, and vice versa.
Of the wires get really hot, then the issue might be with reversed polarity. Give it a try but don't do too extensive or long test periods. Just enough to see if it cycles or not.
Edit:
Darn post gap, CS got it before me, he is explaining if better. Check what he is suggesting.
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bera
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Im Turkish.
Posts: 37
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Post by bera on Sept 9, 2014 8:32:47 GMT -5
yup that was it. thank you guys so much!
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Post by Stinger on Sept 9, 2014 9:17:52 GMT -5
yup that was it. thank you guys so much! No problem, it's a common mistake. I suggest you take a red indelible marker and mark the little round thing next to the positive terminal as red so that, in the future, you know what should go where. You could also scratch a "+" sign in the plastic on that side of the motor. |
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