Originally Posted by
Erik Loza
So, I went back and looked over that TSB. It is specifically in reference to X-roll machines that have the remote start on the slider. Not Hammers or X-rolls with start switches only on the chassis. On the X-rolls with remote start, they use the table>bearings>guideways>base rail>chassis connection as the ground circuit. Apparently, there were some incidents where enough crud built up on the guideways that it was created a bad ground. To me, this is a function of inadequate dust extraction plus lack of regular maintenance but I've also been in enough pro shops to be completely un-surprised by anything. However, I've never had it happen to one of my customers and never even heard about it coming up as an issue among any of the US service techs. Personally, I think it's a good idea to wipe the guideways down anyhow, but there's your official explanation.
Erik