I was having the same issues a while ago.
I contacted customer support and finally got someone who seemed to know what they were talking about.
They told me to run a copper wire from the cutter to the stand (having both ends touching solid metal).
Since then, I've still had the problem.
Tonight I'm probably going to take half of the cutter apart and see what the deal is.
For the money...it's a great cutter...I just think the setup between the cutter, stand and grounding between the two is flawed.