What is wrong with my router? - Router Forums
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post #1 of 15 (permalink) Old 01-10-2019, 01:53 PM Thread Starter
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Default What is wrong with my router?

Hello.

Maybe somebody could give me a clue how to fix a router, a Bosch Gof 1300.

At upstarting there comes a scratching sound, quite hard, can feel in the body of the router, and immediately there issues some smoke.
I have replaced the lower bearing, although it seemed fine, but this did not help.
The upper bearing seems fine, runs smooth when I turn it, there are no marks on it or the house where it runs.
There are no scratches on the copper windings or inside the plastic housing, no signs of friction that I can see.

Anybody have a clue? Thanks.
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post #2 of 15 (permalink) Old 01-10-2019, 02:44 PM
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Hey, ørnuløv; welcome!
Smoke sounds electrical not mechanical. Brushes OK?
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post #3 of 15 (permalink) Old 01-10-2019, 02:46 PM
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Does the smoke start in the first couple of seconds, or after it runs for a minute or two? Are the brushes worn or the springs that push them in damaged? Could you have gotten some lubricant or cleaner in the motor windings when you replaced the bearing? Are all the housing parts, bolts, screws, wire nuts, etc. tight and in place? Is any small part rubbing against a moving part? Any damage, scratches, debris in the motor's windings? Wiring smoke has a distinctive smell, is that what you smell? If you run it this way, does the fuse blow on that house circuit? Is there a short in the on/off switch? Does the speed control work? Any sign of a short on the speed control circuit, burned spots for example? If you take it apart and sniff the different parts, does one have a stronger aroma of smoke than the others? Are there any burned or melted spots where the power cord attaches to the router? Sometimes a stray strand or two of braided wire will short out Is there any lateral movement or play in the motor shaft, particularly at the end where the old bearing is located? All these things are where I'd start trouble shooting.

The more I do, the less I accomplish.
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post #4 of 15 (permalink) Old 01-10-2019, 03:38 PM
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correct voltage???

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
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post #5 of 15 (permalink) Old 01-10-2019, 04:18 PM
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Why would the wrong voltage cause a scratching sound on startup?
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post #6 of 15 (permalink) Old 01-10-2019, 04:45 PM
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Quote:
Originally Posted by DaninVan View Post
Why would the wrong voltage cause a scratching sound on startup?
collateral damage...

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
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post #7 of 15 (permalink) Old 01-10-2019, 07:46 PM
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Usually, when you let the magic smoke out, the tool is history. I hope you have better luck.

Charley

Central North Carolina
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post #8 of 15 (permalink) Old 01-11-2019, 12:23 AM
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"...when you let the magic smoke out, the tool is history."
-Charley

Ouch! LOL!
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post #9 of 15 (permalink) Old 01-11-2019, 03:14 AM
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I agree that the smoke may signal the end for the router but check the brushes first. If you can feel something rubbing while turning the shaft by hand then try turning it with the brushes removed. If you still feel it rubbing you could try taking the armature out and look for wear marks.
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Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #10 of 15 (permalink) Old 01-11-2019, 08:13 AM
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Quote:
Originally Posted by CharleyL View Post
Usually, when you let the magic smoke out, the tool is history. I hope you have better luck.

Charley
That was my saying for helpers when I was teaching them HVAC repair. I see it gets used for other learning experiences as well.
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