Soxfan963,
If I run the machine at a VERY slow feed rate, it runs fine. only as I speed it up do I run into problems....
Your router is an emitter source of EMI. Anything that sparks creates noise,
electromagnetic energy noise ( signals we can't understand ). The faster it runs the more noise it is creating. The electromagnetic energy noise could be envisioned as a ball / field of dirty air around the emitter and the intensity of the dirty air drops off relative to distance. Anything, wire, control box, computer,that cuts that field will couple / have a voltage created on it and the
offending voltage, frequency dependent in many cases, may interfere with a device causing interference to it.
Dealing with EMI is problematic because one needs to have understanding of what is happening, able to look at the big picture,and have a good understanding of basics
relative to RF / EMI. There are "books" written on the subject. I say this because solutions to a problem usually are just some partial suggestions / narrow view of the problem on how to deal with it.
Here is some general info at a high level:
EMI / RF / noise creation requires a source of creation which could be called an emitter. The noise can be anything from specific to broad spectrum of frequencies
and vary in intensity and duration. There must be a path from the emitter to receiver and provide for inductive, conductive, or radiated coupling.Then there must be a reciever of the noise. One can address the problem by eliminating the source ( or any one of the above three), minimizing the intensity, protecting the recievers, providing different levels of grounding. By grounding, I mean in terms of providing an less restrictive / independant path to ground for the noise.
Now I must say even the most experienced folks on the subject will comment,
" sometimes it's like black magic".
Just some insight on the matter,
RICH