CNC control loses USB connection to PC as soon as spindle is switched on?
Good day,
I have a problem with my self-built CNC milling machine. The controller (Estlcam terminal board) and the spindle https://www.amazon.de/RATTMMOTOR-Spindelmotor-Frequenzantrieb-VFD-Wechselrichter-Graviermaschine/dp/B097868JJ1/ref=asc_df_B097868JJ1?mcid=a8bd8ebe58013bba9c74af2ec38b3c66&th=1&psc=1&hvocijid=12344881830677194018-B097868JJ1-& hvexpln=75&tag=googshopde-21&linkCode=df0&hvadid=696184104678&hvpos=&hvnetw=g&hvrand=12344881830677194018&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9042384&hvtargid=pla-2281435176218&psc=1&gad_source=1) are supplied with two external circuits. When I mount the spindle on the milling machine and turn it on, the controller disconnects from my PC. If I remove the spindle and turn it on, the connection remains. Now I did a little research and came to the conclusion that there might be something wrong with the grounding, so I laid an extra cable from the spindle to the frequency converter, but without success.
I hope someone can help me with my problem. Thanks in advance!
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If the spindle line and the data line start from one point with reasonably stable potential conditions, their ground lines must be guided separately from there and they must not be connected to one another again in any case outside.
Theoretically, the ground lines have the same potential, but only theoretically.
Do you have a network filter for the frequency converter? Spindle feed with shield or without?
I had a similar problem last night (Controller lost the connection and the screen showed black) but it was with me (even if I can’t explain it to myself) on the length of the spindle line. Had a 10m 4x1qmm line and then cut it to 5m and the problems have disappeared. However, I use a FluidNC Board + Raspberry Pi with CNCjs and have both mains filters and shielded lines for limit switches and spindle.
I don’t have a net filter and no shield. I have read about the two things briefly and excluded them because if I leave the entire structure as it is (also the cables) and the spindle demontize, but on the milling with a wooden board in between, the connection remains
I suspect an overload of the USB power supply to the control board when the spindle is switched on.
This happens when the circuits are not sufficiently separated.
You believe how many scrap schedules to find on the net are all not working and 80 percent of the fully assembled engine drivers from China are just scrap.
If you want quality then buy only components from AZ-Delivery
I have recently taken all the components from my control box for testing, I have even connected the spindle for testing with an extension cable in another room. The problems remained, I almost “turned” everything back and forth at the current construction without improvement.
Do you have an independent controller board incl driver or have you taken a microcontoller and connected the engines via separate drivers?
So I looked at the set once and it’s also a schematic.
If you have all connected to me by instructions, then three possible sources of error are included:
Yes, it has an extra power supply, the stepping motors have their own power supply, but both run over the same power plug. The spindle has its own plug.
Did you also connect the Estlcam board to the additional power supply?
I used this set here, with separate drivers. https://www.rocketronics.de/shop/de/estlset1.html?gad_source=1&gclid=CjwKCAiAm-67BhBlEiwAEVftNj83r-h-MQcRDGUZmP1D0I9Yz38s5PmVBjvd7MZ5qFK_NK5sQ