GRBL Error when powering off Dewalt Router

Software
1

Ok when I’m changing bits in the middle of a job or when I’m completed the job, but when I power off the Dewalt Router I get the error. It happens exactly when I power it off. That is only time that it happens when I power it off, not sure how this is happening since its not connected to the machine anywhere but it does happen. Anyone else have this problem? a Fix?

2

This is caused by EMI. A couple of things specific to this to try:

  • plug the router into a separate surge protector from anything else
  • turn the router down to low before powering off or on
  • turn the router off using a separate switch such as on a router control block or the surge protector mentioned above

and a good quality USB cable with ferrite beads — also add ferrite beads to the router power cable (what seems to be one on the Dewalt is (in my experience) an anti-theft device).

If those things don’t help, the community has worked up a long list of things:

https://www.shapeoko.com/wiki/index.php/Electronics#Recommendations

2 Likes
3

Awesome thanks Will I’ll get started on fixing it this weekend.

4

Check how your cables are run as well. Try to keep the router cable away from the USB cable. When I relocated my machine to a different area of my room I had to unplug all the cables. When I hooked everything back up I started getting the same problem. I found my USB cable was running paralell to a 120 volt cable for not more than 3" to 4". That’s all it took to cause the exact problem you are describing. EMI at work for sure!

1 Like
5

To add onto @Bjohnes comment above, proximity matters. In my noise mitigation exercises with a CM v2.2 controller I’ve induced disconnect with router shutoff by having the router power cable on the machine extrusions and/or in proximity to stepper and limit switch cabling

I’ve since isolated my router AC power source and cable routing, added ferrite cores, and run a usb isolator. With that I’ve mitigated all CM disconnects and I’m happily running v2.2 and v2.3 PCB versions.

4 Likes
6

I’ll third that. I had one disconnect when I accidentally looped the router cord down the wrong side of the enclosure right next tot he usb cord. moving it to the other side of the box cured it… ps I have 2.4d board.

1 Like