Hi Mark, My first thought is damage or a discontinuity to the commutator surface. This can be checked with a dial indicator. If found, lathe turning may be needed. Also check for high mica. The other things to check are all electrical connects and spring pressures. Make sure all brushes slide smoothly in the respective holders.
Jeff M. ________________________________ From: Mark Hanson <marke.han...@hotmail.com> To: "ev@lists.evdl.org" <ev@lists.evdl.org> Sent: Wednesday, May 8, 2013 7:17 AM Subject: [EVDL] Weird Rear Brush Sparking Weird rear brush sparking. On my 9" Impulse Netgain series wound motor, the rear (towards the tail shaft) brushes keep wearing down every 3K miles and sparking. has anyone had a similar problem and know what the cure is? Best Regards, mark E . Hanson in Roanoke, VA www.REEVA.info -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130508/4002ccb6/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130508/dc572ab4/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
