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hpi_guy
Junior Member
United Kingdom
401 Posts |
 Posted - 16 November 2011 : 21:05:42
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| Hi guys, I got my brushless motor today and I have a few questions, why does the motor sound sandy when I run it (sounds like the spur gear is slipping but it's all ok when I trim it by hand) and there is a spare lead coming out of it with a 2 pin plug, anyone know what it is for? |
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TomTom
Average Member
Kyrgyzstan
596 Posts |
Posted - 17 November 2011 : 18:47:14
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| Is it a sensored motor? The extra lead may well be the sensor lead. Have you had a look in the instructions? As for the noise I cant really say. Have you checked that the mesh isnt too tight? You should have a bit of backlash (play) between the spur and pinion gear. Stick a bit of paper between the two and tighten up the motor bolts whilst squashing the paper, that should give the right amount of mesh. |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 17 November 2011 : 19:04:11
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| Ok I'll have a look, it's not a sensored motor or esc but there is a jst plug? And why does it have 3 wires? Yellow, red and black |
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TomTom
Average Member
Kyrgyzstan
596 Posts |
Posted - 17 November 2011 : 20:00:43
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| What combo did you get? |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 17 November 2011 : 20:04:53
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| Reedy 3300kv brushless and associated xp sc450-bl |
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TomTom
Average Member
Kyrgyzstan
596 Posts |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 17 November 2011 : 21:16:53
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| Cheers tom, one last question, what are the 2 capacitors for on the battery lead? |
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TomTom
Average Member
Kyrgyzstan
596 Posts |
Posted - 17 November 2011 : 21:29:27
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Sorry but I have no idea! My knowledge of electronics is limited to plugging stuff in and the occasional bit of soldering  |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 17 November 2011 : 21:36:38
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| Ha ha ok pal |
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davecorah
Junior Member
United Kingdom
342 Posts |
Posted - 17 November 2011 : 21:46:57
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the 2 capacitors on the battery lead will be there to smooth out and control the voltage going to the esc, they store up power so that if there is fluctuations from the battery the capacitor effectively "tops up" the voltage, gives smoother power delivery to the esc leading to smoother power delivery to the motor with less hesitation
as it is a sensorless esc then the three power leads can be connected in different ways giving reverse or forward motor rotation (should be normal (forward) rotation for a blitz. sensored motors and esc's havce to be connected in a specific way other wise the wont work,
the noise could be just normal noise from the motor, (my lrp clicks when turned) or could be a damaged pinion or just a noisy bearing |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 17 November 2011 : 21:54:00
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| Cheers Dave, I think that the pinion may be a bit to tight to the spur as I can't see it being a bearing or pinion as they aren't very old |
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admin
Forum Admin
United Kingdom
1189 Posts |
Posted - 17 November 2011 : 22:08:14
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| on another note Will - are you racing Sunday? |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 17 November 2011 : 22:25:13
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| Can't, haven't got my insurance as I was planning on getting it last tuesday and parents have just paid alot for me to go to france skiing so I could just squeeze my member ship out of them |
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admin
Forum Admin
United Kingdom
1189 Posts |
Posted - 17 November 2011 : 22:40:38
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| don't need membership or insurance Will for this Sunday. You can race as a guest at the club three times before you have to have BRCA. |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 17 November 2011 : 23:02:04
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| I have already used my 3 guest entries though |
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hpi_guy
Junior Member
United Kingdom
401 Posts |
Posted - 20 November 2011 : 18:17:52
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| Does anyone know of a way to cool the motor on my blitz, I have looked at a fan but it wont fit as the bumper is in the way |
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