what would happen/has anyone everr

[saw dust john]

If you wired you dewalt  straight from the motor to the wires to the switch, what would happen, I know you won't get variable speed, but it might help in troubleshooting.

[dgman]

OK john, didn't you already hook up the motor to direct power? If the motor runs on 120v then it should work, but don't hold me to it!

[Russ C]

I thought there was a circuit board in there somewhere. Is that just for variable speed or does it do more. Heh i'm sorry but I think you really need to know what you are doing before you make a bigger mess than you have. 

[HWPlmbr1]

you all knew this was coming...











DUCT TAPE?

[saw dust john]

I hooked the motor up to electric power through the wall but now going I'm thinking going through the wiring of the saw and on to the switch, by passing the circuit board

[mrsn]

The circuit board on my saw looks more complicated then just for the variable speed part. I don't know what else it would be doing but it looks like it might do something. I wouldn't try unless you are willing to loose the saw, just in case.

[saw dust john]

I agree, it does look like it does more and then there is a mini circuit board for the speed control by the top switch.

[Chachi]

you all knew this was coming...DUCT TAPE?

Doesn't work I tried that myself.... Oh and the Jumper cables are out as well...
So is the coat hanger and tin foil.........lol

[lwsjc]

On my Dewalt, I disconnected the wires from the switch and connected them together.  If it runs this way, It is the switch.


I now use a foot switch.

Larry

[jim stiek]

If I am correct the motor is a dc type it gets its correct power (voltage) from the circuit board if you connect it to an a/c circuit it is probably toast, plus this is dangerous for any one that is not qualified in the field to tamper with. Had a friend with the same problem on an rbi he tried to wire around the board before he called. Fortunately he was unsucessfull in his attempt a new circuit board fixed his problem. If it is just not turning on a competent electrician can help you out, eleminating the sw. and use a foot control seems like good advice.

[tux_linux]

Stay with Larry!

If it's the switch, you'll find out. If it is not the switch, the speed electronics might be the problem.

Is the motor labeled in any way?

regards
Torsten

[saw dust john]

FIXED!

Ok, gathering all the advice from a couple of forums, I decided not to by pass the circuit board.



So first I thought I would put it all together again and start fresh.



The thing works great.



No problems, speed control is perfect.



Now why was this happening.  So I started thinking and when I took it apart,  out fell a piece of styrofoam from the back end.  I didn't think much of it, thought it was packed in holding something in place.  Didn't know where it came from, so had no way of putting it back to what it was holding. 

So I am thinking that it fell apart and lodged up against one of the arm and was causing so much resistance that it slowed the saw down to barely moving.



last question:

do new brushes make more noise as they are flat and haven't conformed to the rotation of the motor?

[tux_linux]

If so, they would only make noise for a very little time until they adapt to the motor.

But I see no cause for more noise here.

regards
Torsten