On Thu, 25 Mar 2010 11:39:37 -0400, "Sean Breheny" said: > One version of this robot uses neoprene wheels and doesn't have this > problem (ESD) when running on concrete. A larger, heavier version, > though, uses urethane wheels due to the necessary hardness, and these > have the problem. We have not been able to find a commonly-available > alternative material for the main wheels which can handle the loads, > although we are looking at getting conductive additives for the > urethane. Can you add an additional neoprene wheel or caster that is not loadbearing but merely for ESD? Cheerful regards, Bob -- http://www.fastmail.fm - Same, same, but different... -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist