Re: Mach3 - ESS smooth stepper - Huanyang Chinese VFD - Mach 3 e-stopping???
Originally Posted by
Chris D
All good information, thank you.
I am still trying to determine what the source of my "noise" is. It could be radiated or it could be conductive. Assuming that the shield on the spindle cable is effective, then I would be looking elsewhere for the source of the noise.
I could spend days and tons of money shielding all my cables differently, only to discover that all the noise problems I have are conductive.
In other words, I am trying to avoid a shotgun approach by changing everything.
My Hitachi VFD is mounted in another metal enclosure, everything including the shield and ground on the VFD cable is grounded. My shields are all soldered and grounded. The spindle motor is grounded directly to a grounding conductor in the cable and goes directly back to the VFD enclosure. Zero noise and issues and I double checked with my digital oscilloscope. Contrary to what you see posted here soldering is an accepted method when dealing with RF and grounding. All my connections to the grounding shields are soldered and I have Zero issues. Soldering for RF and EMF grounds is common accepted practice and has been for many years. Having been involved in building radio transmitters and receivers I did a lot of that work. In the military it was Mil spec and had to be done correctly in order for the air craft to be flown. Those of us who served know what that is.
Correction: It was not Mil spec it was a USAF TO (Technical Order) which covered ALL air craft repair procedures for Everything, even to the part numbers of the terminals, wire and solder but much more detail. There were TO's for everything on the air craft, including inspections.
Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4 Kimber 1911 45ACP