Re: [CAD_CAM_EDM_DRO] Static electricity - WOW

YES, the machine should have a ground run with the power line which is also connected to the machine chassis.  On large industrial machines we often ran a separate ground wire from the machine chassis directly to a grounding rod driven into the ground thru a hole drilled in the concrete floor of the factory or shop.
 
Are you using PVC by any chance anywhere between your dust collector unit and the machine?  If so, get rid of it and put metal pipe instead.  If you are using a small portable dust collector or a shop vacuum with plastic head on it,  you probably should ground the hose going to your machine.
 
One other thing you need to know is that wood dust can ignite and explode from even a small spark.  Many of the fires in woodworking factories start in the dust collection system from static sparks because of improper grounding or using PVC or other polymer material in the dust collection tubing.
 
Hope this helps out.

Randy Abernathy
CNC and Industrial Machinery
service, repair, installation and
design

4626 Old Stilesboro Rd NW
Acworth, GA 30101
Fax: 770-974-5295
Phone: 678-982-0235
E-mail:
randyabernathy@...

--- On Mon, 2/22/10, Jack <freshwatermodels@...> wrote:


From: Jack <freshwatermodels@...>
Subject: [CAD_CAM_EDM_DRO] Static electricity - WOW
To: CAD_CAM_EDM_DRO@yahoogroups.com
Date: Monday, February 22, 2010, 2:32 PM


 




I guess I have a static electricity problem. While cutting a model boat
stand on my router I was using a dust collector . I was holding the
hose by hand. Something touched something else and both I and my
computer got a jolt of static electricity. Has anyone else run into
this? Cures???

I am assuming I need to ground the router which is aluminum on a wood
stand. Do I need to somehow ground the plastic hose on the dust
collector?

Any suggestions, insight, etc. appreciated! !!!!!!!!! !

jack








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