My solution for static discharge

[hinro133]

I’ve been using the Rowdy Roman hose boom and generally like it, but found that my vacuum hose would often contact and discharge static electricity into my spindle, resulting in small z-axis drops on long carves. I made a simple stand-off that works well. It’s a series of plywood donuts stacked on the support with a shaped piece of plywood on top. Haven’t had a problem since I started using it.

[pwpacp (Phil)]

At first I was a little confused as to how your work around averted static problems until it dawned on me you are simply increasing the air gap between the flex hose and spindle housing.

I like your KISS approach!

[rscamp (Rob)]

A ground lead (routed through the drag chain from some copper water pipes or similar) connected to some copper tape at the vacuum inlet seems very effective at eliminating the static charge produced by the high velocity flow of chips.