I have a simple Chinese 3018 pro with a 800 w, 110v dc, 20,000 rpm.
This motor likes to get warm, I think too warm because USB error occurs regularly.
My question is, how warm can such a motor be max., and why this USB error message.
I have only placed a few cooling coils, which regulates the temperature, but actually this should not be necessary, right. Why then quickly a USB error occurs and you have to start all over again.
Can someone explain what is going wrong here?
Hey there, the USB Error happens where? Which program?
It just happens spontaneously, I thought after 3 hours of milling that my spindle was getting a bit warm, and that could be the cause.
Today the spindle is not warm at all with those thick ribs, but then suddenly that USB error again.
It drives me crazy, because you never know when it will go well.
I think that ECM from the frequency controller, 110VDC, still has an influence and causes magnetic interference.
I have noticed that the USB conflict reacts very sensitively, to the slightest change in external influences. Such a controller can of course be the interference transmitter, and I wonder.
I am looking for an EMC filter dc/dc 110 V, to put that in between, but that does not seem easy either.
In any case, USB error is still active with me.
What kind of controller do you use? Neither the Jackpot nor the SKR use a USB cable. Estlcam uses a USB cable and you need a properly shielded one. Cheap cables always gave me errors as well.
I used estlcam as controller, and I bought a new cable in the city of Mindelo, a blue one but also very cheap price and same problem.
But why I can work for many hours w/o any problem, and now after starting up 10 minutes later again.
The problem is Amazon dont send to CaboVerde, ebay some times.
I have a laser 20 watt to, and never any problem with grbl and USB. A simple usb cable, and thats it.
Yes, but a spindle/router make more electrical noise. Get a shielded cable with a ferrite core and you will never have to worry about it again. Christian also says so on his website that a good cable is crucial. 
I have connect an usb 2 cable of my extern hard disk, works great. This extern disk has never problems with any errors in many years, the usb cable must be a good one.
The proof is here, a good data cable is a must. That’s all.
The hard disk does not create as much electrical interference as the spindle, so it can’t really be compared though.
The result is the same: Estlcam needs a proper USB cable.
For me is this a proper cable, it works. Data !
Spindel motor is DC, and frequency almost zero. You have problems with interferentie by AC.
But Okay, the usb cable must be a good one.
