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  #11  
Old 02-25-2017, 09:11 PM
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Quote:
Originally Posted by digger doug View Post
The welds look to be "Hi-speed" welded....the shielding gas couldn't keep up....
dirty steel, or the shield sleeve plugged with boogers.
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  #12  
Old 02-25-2017, 11:58 PM
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That pot is only going to be 10 beans or so. Looks like the part number is on the case, just plug that in your search bar. There is a very good chance you will get a hit, exact replacement very easy fix.

Greg
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  #13  
Old 02-26-2017, 12:20 AM
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Quote:
Originally Posted by Shade Tree Welder View Post
Yes 90 volt.

There are rivets on the board, so disassembly and reassembly is not easy. Not putting extra work in to it I don't have to.
There are only three leads to solder to the board. If nothing else, snip the three legs from the pot, leaving them long enough to clip on test leads to a new pot. They're about 5 bucks at Radio Shack or you can get a bag of them online.
Man up just a little bit & stop being a dick about it.
Or hell, let Robbie handle it.

by the way, make sure it's a linear potentiometer, not audio. Appears that you want one with long pc pins to reach through the circuit board.
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  #14  
Old 02-26-2017, 01:16 AM
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Originally Posted by cutter View Post
...Man up just a little bit & stop being a dick about it.
Or hell, let Robbie handle it...
Can't wait to see the response to this...
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  #15  
Old 02-26-2017, 01:36 AM
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Can't wait to see the response to this...
I have some popcorn with extra butter and salt popping up now.
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  #16  
Old 02-26-2017, 01:44 AM
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I have some popcorn with extra butter and salt popping up now.
I'll be right over. OOOH, this gonna be good!
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  #17  
Old 02-26-2017, 02:59 AM
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Being the motor is a 90 volt, the controller is some type of offshoot of a router speed controller.

If you can just test the motor with your car battery, then ....

The case history of failing parts would be a TRIAC in a router controller. the transistor that has the heatsink riveted to it.
Look for a part number on the TRIAC.

BTW, when it comes too metal tabbed transistors, the tabs are "usually" tied to one of the power leads
meaning a tab without the use of insulators is likely to electrify its heatsink and associated metal parts.
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  #18  
Old 02-26-2017, 08:43 AM
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Quote:
Originally Posted by cutter View Post
There are only three leads to solder to the board. If nothing else, snip the three legs from the pot, leaving them long enough to clip on test leads to a new pot. They're about 5 bucks at Radio Shack or you can get a bag of them online.
Man up just a little bit & stop being a dick about it.
Or hell, let Robbie handle it.

by the way, make sure it's a linear potentiometer, not audio. Appears that you want one with long pc pins to reach through the circuit board.
They do not sell such hi tech stuff any more, the best they last had were cell phones, and memory chips....... in Atlanta they have gone belly up... Why to many stupid people with no clue... Remember Heathkit ... ?


WHAT? ......... looks like an SCR to me
V
BTW, when it comes too metal tabbed transistors, the tabs are "usually" tied to one of the power leads
meaning a tab without the use of insulators is likely to electrify its heatsink and associated metal parts. .

That's a stretch ...... huge one.. borderline BS, metal cases or tabs on solid state devices are passive heat sinks*
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Last edited by pepi; 02-26-2017 at 09:08 AM.
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  #19  
Old 02-26-2017, 09:53 AM
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Originally Posted by LKeithR View Post
Can't wait to see the response to this...
Quote:
Originally Posted by Dave Lee View Post
I'll be right over. OOOH, this gonna be good!
Just a senile old man, poking the bear...
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  #20  
Old 02-26-2017, 10:10 AM
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Here is the electrical drawing, the 'speed control' is a lot more than just a
speed control. I do not know if the magic smoke escaped or not. The fuse
was also blown. This is often used by my buddies employees. So you never
are sure of he whole story.

My buddy's employee, is always sober, works hard, tries to learn, and shows
up on time. So he is good starting material. He is not the sharpest knife,
but he does make up for it in effort put forth.
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