Mark, could you post a picture of this ground connection you made?
I just got through putting three of those on a Smithy Mill/Lathe combo.
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------- Original Message -------
On Sunday, March 6th, 2022 at 9:10 AM, Mark Kimball <markkimball51@...> wrote:
If you can at all afford it, stay away from remote-reading igaging DROs that have aluminum scales.? The scale is part of the sensor circuit and has a sliding ground contact made to it inside the sensor box.? Aluminum develops an oxide coating, making that contact resistive -- and when it does, the scale turns into a magnificent antenna for picking up electrical noise.? I think that's part of the reason that messing around with the DROs could temporarily fix the problem, but it always came back.
I have 3 igaging DROs with aluminum scales, and all 3 of them now are hardwired to the sensor's internal ground -- holes drilled in the end and a screw + spade connector attached.? For me, this was the "final solution" to my EMI problem.
As a result of my experience, when I later bought two igaging DROs to put on my lathe I chose to go with stainless steel scales.? Even for them I still had to solder an additional 1 uF capacitor across Vcc and Ground inside the sensor box.
Mark
