You can try smash that piece of metal off with a screwdriver but looks like your issue is most likely the bearings. Sometimes its hard to tell if they are bad by feeling them. Looking at the quality of that motor I wouldn’t be surprised if they come with pretty crap bearings to begin with. If the tolerance on the balls is a loose fit then they can resonate at higher rpms.
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Yea that was kinda my thought too. Definitely is hard to tell for sure though. Just for future reference, where would you reccomend getting higher quality motors? This one is from Alien Power System, but I assume that they are just China imports. (Also I noticed NSK branding on one of bearings)
What size and torque rating is that motor?
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It’s a 80100 motor, around 7kw peak. Here is the link for more info: https://alienpowersystem.com/shop/brushless-motors/80mm/c80100-v2-sensored-outrunner-brushless-motor-180kv-7000w/
Reacher RT7490 would be a good high quality alternative. They’ll do samples on alibaba.
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Yeah I sent an inquiry to them. A pair of battle hardened with upgraded enamel and magnets was $430. That’s a really good deal for what you’re getting imo. Much better deal than buying from SKP as well.
They respond incredibly fast as well. I usually got a message back within the hour.
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Clean it as much as you can, check for loose magnet and check the bearings too.
I’ve noticed small scratches only on one magnet if I’m not mistaken.
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Yea there may have been a little scratching. I cleaning it out pretty well with isopropyl alcohol and got it pretty clean. I’ll check soon to see if the motor issue has improved.
So I put it all back together after I cleaned things out. At first, the motor sounded good as new, which was great, and really superising to me as I didn’t really think I found the cause of the issue in the motor. However, as I continue to use it more, it is starting to make the same loud noise again, unless at extremely high RPMS. So, time will tell to see if it ends up as bad as it once was previously.
So now the motor is back to screaming again, and now I am also getting overcurrent faults on my Tronic 250. I have it set to 95 amps for the motor. How could it be set to 95 amps, and get overcurrent faults of over 400 amps? It has to be something wrong with the motor, right?
Bearings, get some new quality ones for high speed applications
yeah this does sound like something fucky is going on, either with the ESC or the motor.
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Any updates?
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Not much progress. Still making the same weird sound. I emailed APS about the issue, and they were pretty confident it wasn’t a bearing issue, and said, “You can either set a different timing on the vesc to check if this help, or maybe the shaft of the motor is not all the way back and cause a slightly play that cause this sort of vibration noise”.
I haven’t really had time lately to do any more investigation, and I’m not really sure how I would go about changing the “vesc timing”, whatever that means. But I’m still shopping around for other motors right now, especially because I’m still getting a lot of motor faults. I’m looking at the reacher 7490, but I would prefer something a little larger. Any ideas?
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