Hi Steve, My Logisystems controller in my truck is still going strong. The truck was not in use the last couple of years but has recently been put back on the road and the controller still works as well as the day I took it off the road. It probably has 4 years of daily driving on it. I have never had the jerky start problem others report either. I am using a PB6 for the throttle. My original Logisystems controller did blow up after a couple of months use, but it was replaced with the "new design" and has worked fine ever since. I am not sure why mine has held up so well and been trouble free. I can think of a few likely explanations. I am using it on a smaller motor, ADC 6.7 incher. This little motor probably does not have the torque to cause a jerky startup, and there also may be a motor induction difference that has protected the controller. I have never operated it near the voltage limit and am usually well under the current limit. My controller is a 1000 amp 72-120 volt model. I have operated it everywhere from 72 - 108 volts. I do not have a meter on the motor loop, but have never seen much more than 500 amps pulled from the battery side and only very briefly under initial acceleration. My current draw is usually much lower. I did find it necessary to adjust the current ramp after I first installed them motor. With no ramp dialed in I found that it caused my clutch to slip on startup, so I fiddled with the adjustments until I felt I had a reasonable compromise between immediate throttle response with no clutch slippage. As far as what went wrong with Logisystems, I can only imagine that they did not have the expertise to get it right. My recollection is that they had a stellar reputation for fixing and upgrading Curtis Controllers before they launched their own line. I suspect they mostly cloned the Curtis design, and perhaps did not have the real engineering talent to properly design a controller that would be used in such a wide range of applications and abused by DIYers the way we tend to. I talked to their support people a few times and felt like they did not always give great advise. For instance, they assured me that I did not need to include a pre-charge circuit. I went ahead and added one. They also told me that the controller heating I noticed was fine and described how they had wrapped one in a blanket on their test EV to let it heat up even more and it had done just fine. I went ahead and added extra cooling. damon
> Date: Tue, 30 Apr 2013 10:57:01 -0400 > From: [email protected] > To: [email protected] > Subject: [EVDL] Logisystems pot box > > <I am looking for a Logisystems (non linear) 5k pot box. I actually have a > Zapi controller, but it has similar issues to the Logisystems where it is > way too jerky on startup. I used to have a Logisystems pot when I used > their controller in a different car. I've looked, but it appears > Logisystems is gone (out of business?). Does anyone have one of these pots > or can tell me how to achieve the same result modifying my existing Curtis > PB-6? I believe their pot box is geared to achieve the effect.> > Steve > > I have one. I would be willing to let it go for $50.00 plus ship or > TRADE for a working PB-6.. > > I still have a logisystem controller that I am using on my lawn mower > that still works and there are two others that I know of that are > still working.. It seems, that the very FIRST logisystems do not > suffer the problems that the older ones did. This was a fancy gear > drive throttle box but it didn't really seem to solve the problem for > the later model logisystem controllers. Does anyone have any thoughts > about what went wrong with this company? They seemed to be good people > trying fill in ( Zilla had shut down and Soliton and the Warpcore > were not up and going). > -- > Steve Clunn > Tomorrow's Ride...Today > www.Greenshedconversions.com > _______________________________________________ > 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/20130430/93cb47a7/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)
