I starting building my first electric skateboard this summer and I need some help figuring out how to solve my problem. When I ran the detection on my vesc the motor does not spin at all and the settings I get back when the detection finishes seems off.
here are the settings its giving back to me:
Vesc ID: 55
Motor Current: 4.05 A
Motor R: 3665.6 m ohms
Motor L: 3261.5 µH
Motor Lq-Ld: 0.00 µH
Motor flux linkage: 15.24 mWb
Temp Comp: false
Sensors: Sensorless
my current set up is:
Flipsky Sensored Brushless DC Motor 6368 170KV 2700W
FLIPSKY Mini FSESC6.7 PRO 70A
Two 5s 3300 mah batteries connected in series
Im honestly stuck on what to do here, I know that the current is way to low and the Resistance and Inductance are too high but I can’t figure out what is causing it. Also I have the sensor wires plugged in so I’m not sure why its saying it sensor less. I’ve run multiple detections and every time the current come out to somewhere between 3.5-4 amps, the resistance usually ranges from 3500 mohms to 5000 mohms, and the inductance ranges from 1500 µH to 3200 µH. The only change that I made within the tests is that I resoldered one of the bullet connectors on the esc that was pretty bad originally
I assume you’ve double checked your wiring already.
Do you have a second esc or motor that you can test with? Quick way to check if your problem is an esc or motor issue.
No I don’t right now, like I said, this is my first build so all I really have is what I originally said. I have double checked all the connections, but I think I’m gonna go redo all my soldering on the bullet connectors of the esc just to see if that could be the problem
I’m pretty sure my settings are fine, but the settings I am using are
Battery Cells series: 10
Battery Capacity 3.3 Ah
Drivetrain setup: 80 mm wheels 15 teeth motor pully, 38 teeth wheel pulley.
Also when I turn the motor by hand it does seem that there is some rubbing within the motor when it turns and I don’t know if that is normal or not. Furthermore when I connect use the remote to try and turn the motor the way the green light lights up does seem to correspond to the input from the controller so it seems like that’s working. Finally I went in with a multimeter and measure the resistance of each motor ends and I got .3 ohms and from what I’ve seen online that’s a high value
maybe bad soldered connection if the motors are new they should not rub… does it make a sound when it rubs or is it just physical resistance… pictures of gear and all your settings will really help
Its just physical resistance, honestly I described it as rubbing only because I didn’t know how else to describe it. Also here are some pictures of my components and settings.
btw the solder point on the + side of the esc looks a little weird because I had already soldered a wire into it for the Bluetooth module but I took it out once I encountered this problem.
Components
Bullet Connector Solder points on the esc
Yeah I definitely could resolder that side and I was going to replace and resolder the bullet connectors anyway just to rule that out. Do you know what the setting issues are and how I can fix them?
Make sure you’re choosing the right size/weight motor as the defaults will be based off that.
I would also check your sensor wires to make sure they are okay and not kinked or anything.
And I second @trancejunkie on the + terminal but I also would check the -
If anyone has a reference photo of the back that would be awesome, my brain is thinking there’s a lot of extra solder around the pad, around the bottom of the Jst and i’m just not sure if that’s right, but I haven’t used one of these exact vescs before.
You said it doesn’t spin at all tho?
and resistance wise, is there resistance all the way around? or does it feel like it’s only in certain spots?
Yeah it doesn’t spin at all, the resistance feels like its all the way around I want to take the cover off to see if I can find anything wrong internally but I’m worried that if I try to contact them about replacing it they will decline since I opened it cause I’ve know people who have delt with things like that with other electronics industries. but to the best of your guys knowledge do eskate companies do things like it ?
I’ve been trying to find a reference photo for the back of the vesc online too cause some of it did look weird to me too but I can’t find any. However on the front of the vesc there looks like there is some extra solder right above the word mini that isn’t on any of the reference photos of the front that I’ve seen but idk if that’s affecting things
Definitely will go in and check the + and - terminals, and I was gonna check the soldering on my XT90s too.
afaik no. Most motors are made to be pulled apart so as long as you put it back together correctly it shouldn’t have any adverse effects on getting it swapped out or replaced for manufacturer defects
if you dont want to take it apart just post a vid of it on here… ya i know pain in the ass, but it will be easier to see. you can send it to the manuf also.
if its slight cogging from feeling the poles its ok but if scraping no
I took the motor apart and nothing looked off so I’m guessing the resistance is just due to the magnets but here are pictures of the inside and a video of it spinning by hand. So now I’m assuming the problem is within the vesc.
