Dead (overheated) OF1400

[Blabla]

Hi,

After being a long time lurker I have a problem/case I couldn't find anything about through a search on the forum.

I've been given an OF1400 that is dead. It probably died because of overheating. I've tried changing the brushes but that didn't help. Is there anyway I can figure out whether it is the armature/field assembly or the electronics that has died ? When inspecting the armature/field assembly I can't find any visible damage. Nothing seems like it has melted or anything. The electronics board also seems good to me (an amateur who enjoys the satisfaction of getting broken things to work  [smile]), no visual damage. I've also done some testing with a multimeter, but I'm not really sure what  and where to measure to figure out whats wrong. The only thing I've figured out is that the machines power button works and there is voltage on the brushes and armature. Pictures can be provided if thats to any help. Any hints and tips are greatly appreciated !

 

[Michael_MA]

Hi,

After being a long time lurker I have a problem/case I couldn't find anything about through a search on the forum.

I've been given an OF1400 that is dead. It probably died because of overheating. I've tried changing the brushes but that didn't help. Is there anyway I can figure out whether it is the armature/field assembly or the electronics that has died ? When inspecting the armature/field assembly I can't find any visible damage. Nothing seems like it has melted or anything. The electronics board also seems good to me (an amateur who enjoys the satisfaction of getting broken things to work  [smile]), no visual damage. I've also done some testing with a multimeter, but I'm not really sure what  and where to measure to figure out whats wrong. The only thing I've figured out is that the machines power button works and there is voltage on the brushes and armature. Pictures can be provided if thats to any help. Any hints and tips are greatly appreciated !

i'm pretty sure, there is some over temp fuse built in, which protects the unit from burning up. If so, there is'nt much you can do yourself, as a new motor would be required, as this temp fuse is wound within the motor coil. In any case, since you already checked most important parts (brushes & main supply) i would recommend to send it in for service. It's better for your life

kind regards, Mike

 

[Blabla]

Thanks for the reply. Exactly the kind of info I'm after.

I know it would be smarter to send it in for service, this has already been done by the previous owner. The guarantee is expired and the cost estimate to fix the damage was so high that it was cheaper to buy a knew one. But I can't resist the challenge to try and fix this machine. Will keep you posted, but it's probably gonna take a few weeks to get the parts (new armature and field assembly).

If anyone has got some other info/input I would love to hear it.

 

[Ken Nagrod]

Maybe it would be worth it to just sell it for parts and make a buck without the headache of how am I going to fix it and it's really not worth it.

 

[ccmviking]

The 1400 has overload protection.  I know that any time I've used mine heavily for a long time it's starts cutting the power back to keep from overheating.  I'm just wondering if it's possible to actually "burn it out". 

Hi,

After being a long time lurker I have a problem/case I couldn't find anything about through a search on the forum.

I've been given an OF1400 that is dead. It probably died because of overheating. I've tried changing the brushes but that didn't help. Is there anyway I can figure out whether it is the armature/field assembly or the electronics that has died ? When inspecting the armature/field assembly I can't find any visible damage. Nothing seems like it has melted or anything. The electronics board also seems good to me (an amateur who enjoys the satisfaction of getting broken things to work  [smile]), no visual damage. I've also done some testing with a multimeter, but I'm not really sure what  and where to measure to figure out whats wrong. The only thing I've figured out is that the machines power button works and there is voltage on the brushes and armature. Pictures can be provided if thats to any help. Any hints and tips are greatly appreciated !

 

[Blabla]

The 1400 has overload protection.  I know that any time I've used mine heavily for a long time it's starts cutting the power back to keep from overheating.  I'm just wondering if it's possible to actually "burn it out". 

When the overload protection kicks in, does it reduce the power or cut it completely for a given period of time ?

Is it possible to reset this overload protection system ? Or is it automated and controlled by temperature sensors ? Maybe the sensors have gotten so hot that they, like you say, "burn out" ?

 

[AlexThePalex]

The overload protection cuts power completely so the machine won't work until the temperature drops and the sensors give the ok again.

 

[Blabla]

I see. But these overload sensors are they located inside the coils of the engine or is it a separate sensor that is possible to replace ?

 

[spikfot]

I've marvled over how cool my OF1400 runs, even under heavy loads for 8 hours a day.
-Keep those bits clean and sharp!

 

[davee]

I was using my MFK700 yesterday cutting a dado in hard maple.  I really should have been using the 1400 but the 700 is so easy I look for opportunities to use it more.  I pushed a bit hard and the overload shut it down.  Starting working again almost immediately, but I was glad for the overload protection.  An the reminder to use the right tool ( and not cut so much in one pass).

 

[Michael_MA]

I was using my MFK700 yesterday cutting a dado in hard maple.  I really should have been using the 1400 but the 700 is so easy I look for opportunities to use it more.  I pushed a bit hard and the overload shut it down.  Starting working again almost immediately, but I was glad for the overload protection.  An the reminder to use the right tool ( and not cut so much in one pass).

Maybe that inch radius was little to much   just kiddin..

kind regards, Mike