High_Order1 Posted July 31, 2014 Report Share Posted July 31, 2014 So,Long story short, the 18v right angle grinder stopped working, but bypassing the silver electronics module started the motor right up.Therefore, what does that thing do?I am guessing that some refer to a clutch in the tool, and not seeing one, the box may sense a near stall condition and lock out.Thoughts? Quote Link to comment Share on other sites More sharing options...
ChrisK Posted July 31, 2014 Report Share Posted July 31, 2014 WOW! Talk about a great conversation starter!!!! I wish I could help but when I saw the post my mind went to that dark place.... Quote Link to comment Share on other sites More sharing options...
DR99 Posted July 31, 2014 Report Share Posted July 31, 2014 This guy tears down power tools and post on how the exactly work https://www.youtube.com/watch?v=NRxFn96XjOI&list=UUhWv6Pn_zP0rI6lgGt3MyfA It's a really good youtube channel its worth subscribing. Quote Link to comment Share on other sites More sharing options...
High_Order1 Posted July 31, 2014 Author Report Share Posted July 31, 2014 Chris,I've seen the one you describe. NO one will ever figure out how to make that one do your bidding... LOL DR99,Thanks for the link. I'll buzz over there momentarily.Shawn Quote Link to comment Share on other sites More sharing options...
High_Order1 Posted July 31, 2014 Author Report Share Posted July 31, 2014 Well, No dice on the videos. The ones I saw, he was tearing down variable speed tools. This one has on and off. I'll keep looking, though! Shawn Quote Link to comment Share on other sites More sharing options...
ChrisK Posted July 31, 2014 Report Share Posted July 31, 2014 Quote Link to comment Share on other sites More sharing options...
Conductor562 Posted August 1, 2014 Report Share Posted August 1, 2014 I'm talking out my ass here, but I'm guessing it's probably overload circuitry. Have you tried to get it to cut out since you bypassed it? Quote Link to comment Share on other sites More sharing options...
chadlanthier Posted August 6, 2014 Report Share Posted August 6, 2014 It's Pandora's box, u do not wanna open that thing 1 Quote Link to comment Share on other sites More sharing options...
High_Order1 Posted August 7, 2014 Author Report Share Posted August 7, 2014 LOL!I think at some point I'll pour some de-potter in there and see what they hid.For now, though, it works just fine absent the magic box. Granted, I haven't tried to cut 3/8" steel plate with it, but I don't envision that thing for that kind of work. Makes small quick cuts fine, no load sounds right and doesn't overheat it. I dunno. I am going to see if I can upload some of the pics I took to save you the trouble of breaking yours open... stand by Quote Link to comment Share on other sites More sharing options...
High_Order1 Posted August 7, 2014 Author Report Share Posted August 7, 2014 Ok,well, there it is in all it's naked glory! It takes a Torx with the center hole (sorry, I forget the size) in every position EXCEPT the lower one in the base. It is one size smaller. Why? Who knows, but it certainly was frustrating! To split it, you bust out all the handle screws, then the four screws in the angle head that point into the handle. These are tricky. Then pull the angle head off. The clamshell will then seperate fairly easily and nothing will pop out. Be very careful, if you yank the brush holder off, you'll need a pencil or something similar to depress the brushes to reinstall them. Whatever that box does, it affects the ground side. I simply cut the box out of the circuit path, extended the black wire, and put it where the box terminated into the switch. Now, on the newest Milwaukees, there is current needed on more than one terminal. I do not know which other terminals it is. I suspect there is a signal path for a temperature sensor buried in the lithium pack you're supposed to use, but with the way mine is set up, I can't advise. Because that box is removed, you probably should be careful about duty cycle. That thing might prevent you from burning it up by too much torque (really getting into a cut or brushing) or running it too long without cooldown periods. All I know, and my small contribution to this site! Shawn Quote Link to comment Share on other sites More sharing options...
KaHuNaZ Posted August 7, 2014 Report Share Posted August 7, 2014 Not sure if this is the right diagramhttp://www.ereplacementparts.com/milwaukee-268020-ser-b96a-cordless-volt-41234-cutoffgrinder-parts-c-131_4779_16337.html electronics module assembly? No Idea what it does. Quote Link to comment Share on other sites More sharing options...
frankiegarcia19 Posted August 7, 2014 Report Share Posted August 7, 2014 Thanks for sharing, interesting view of guts Quote Link to comment Share on other sites More sharing options...
High_Order1 Posted August 7, 2014 Author Report Share Posted August 7, 2014 Yeah, that's it. T20 Torx sounds right, too. I'm certain it does <i>something</i>, but outside of stall or lithium battery management, I couldn't say. Quote Link to comment Share on other sites More sharing options...
Brien Posted August 7, 2014 Report Share Posted August 7, 2014 Q; What's in the Black Box? A: If you have to ask you can't afford it. Quote Link to comment Share on other sites More sharing options...
Conductor562 Posted August 8, 2014 Report Share Posted August 8, 2014 Thanks for the follow up! Quote Link to comment Share on other sites More sharing options...
BK13 Posted August 10, 2014 Report Share Posted August 10, 2014 WOW! Talk about a great conversation starter!!!! I wish I could help but when I saw the post my mind went to that dark place.... Do you know how a bottle blond is like a commercial airliner? They both have black boxes. Quote Link to comment Share on other sites More sharing options...
ebowejr Posted August 11, 2014 Report Share Posted August 11, 2014 is this on the fuel or regular brushed? I wonder with their "new" fuel powerplant if the situation would be different, maybe it is something with overheating....unless ofcourse it remained the same after a cool down period? Quote Link to comment Share on other sites More sharing options...
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