Hi Jezza. No corrosion on any of the wires anything that looks different in that photo is just the glue from the heat shrink that I haven’t cleaned off before taking the pics.
What I was trying to show in those photos was the difference in colour/finish of one of the connectors. It looks tarnished vs the other two.
What are these connectors? Looks like brass, not copper. You need copper to connect wire to wire.
I have never heard that. I just use the connectors that foil drive use and that you buy in RC shops. Where would I get copper ones from?
The connector looks like it’s seen water and corrosion. I wonder if one of the phases has a slightly higher resistance and as a result blowing out on whichever connector it’s connected to.
I’m not sure how many times I can say it but I have never ever ever ever had any water of any kind in any of my boxes. Plus these connectors (that join the motor to the Vesc) are sealed in dual wall heat shrink. So that tarnished look must be coming from something else.
As I said in a previous post I am running quite long cable between the Vesc and the motor. 3.1metres. Maybe this is causing some sort of problem. I remember back in very long ago versions when I was running 28.8volts that I would get carbonisation of one of the wires I assume due to the heat/resistance due to running the long cable length.
Hi DutchFoiler
Thanks for the tip. Went and did a bit of research and unfortunately i bought brass ones. Not knowing there was a difference. I have now ordered a truck load of pure copper gold plated ones and will replace those ones asap. Probably basic stuff but unfortunately not mentioned much and I suppose known by all (except me).
Are there any tips on what wire to use and what not to use maybe simple things like that are what is not helping the issue/s that I am having.
Thanks in advance
Hi Jezza
Is this higher resistance possibility something to can test?
As mentioned before it have had the same issue over multiple Vescs connected to multiple motors and the motors have their own individual wires so effectively nothing common between them.
When connecting wires, i use the Klauke butt connectors (copper) which you crimp, this is the best connection you can make. For cables, make sure to use flexible / silicon type copper cables, i buy them from aliexpress.
Klauke Butt Connectors (choose right size):
https://www.klauke.com/lv/en/butt-connector-cu-standard-type-4954
Cables:
https://nl.aliexpress.com/item/1005007965899545.html?spm=a2g0o.order_list.order_list_main.35.444e1802YD4H3T&gatewayAdapt=glo2nld
I have had connector casing melt/deform due to bad transfer (on a 6mm bullet connector). So about 200°C.
The difference in color could simply be heat.
If you have an issue like that, your cables are short enough to transfer a lot of heat directly into your ESC.
Yes you can test. But simply make the phase wires 1.5m in length and then see how they behave. Why do you need 3m?
Thanks DF
Yes these are the style of cables I am using for all things other than the motor to Vesc cable which is the standard cable from Saite.
Hi Jezza
3m because I carry the battery and Vesc on my back in a backpack.
I know this is off topic but do you mind giving me the length, width and thickness of the 75100 PCB including the caps? I want to disassemble it and mount it to my own cooling solution but I’m super space confined and I don’t want to buy my own and measure it incase it doesn’t fit.
On another stranger note, what material have you used for your mast mount? I recently read that foilf drive believe that carbon based filaments cause some strange behaviour when not insulated betweem motor and mast.
I have just using the standard foil drive universal torpedo style connector.
Well I have been until today when I tried out a new motor connector which actually does have some carbon in its material. So will be interesting to see if anything odd happens.
Possibly related but not sure. Attached is a pic of the mobile Vesc tool app real time data.
Could any please let me know why my motor temp is reading
negative 94C (when it’s pretty much at ambient temperature 28 degrees C) and why my battery level is reading 103.7 and 228% when it’s actually 50% full at 41 Volts (11S3P)?
mAh must be set incorrectly. You need to get a vesc express module with full data logging to SD card. Then you can log everything until failure. If you want to add an extra level, add in a temp sensor that will cut the signal when your phase wires get too hot.
Have you ever posted pictures of your entire build? It would be interesting to see the entire thing.
Not sure where the mAh is but will look for it.
Not much to see on my build. But here are some pics. Pretty rudimentary. But works ok other than the Vesc failures.
As mentioned previously wire from Vesc/battery box 3m long
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Not sure which motor you use, but most models used here do not have a temperature sensor.
If your’s does not, you should simply set it up like that in VESC.
For me, battery level is just derived from voltage.
I also think that is common on VESC.
So you probably just did not enter the correct number of cells. If you swipe to another page, you can see the raw voltage.
If it is just those settings, they should not have any impact on your problem.
