Update 9-04-09 Added this thread index showing which posts contain certain info. The thread had gotten so long that it is difficult to easily find particulars. Hope this helps.
THREAD INDEX (work in-process)
Recreating the ShopSmith logo plate - posts 14, 18, 39, 59,65,69,108, 176 (the final result)
I started a thread on this machine in the Community forum when I first purchased it. The thread is at http://www.shopsmith.net/forums/showthread.htm?t=3422 . I brought the thread over here since it will soon go from a "Community" announcement to "Maintenance and Repair".
Although I haven't started working on it yet, I'd like to get a head start on what I need to do to evaluate the motor. When I purchased it, the guy said that it needed a motor. Might sound like a basic question with an obvious answer but.....what is the best way to evaluate if the motor is actually bad?
Is the quick on / off the prudent thing to do?
Curious to know typically how much it costs to repair a motor assuming someone burnt it up. Hopefully this question can be answered without knowing a lot of detail about what burnt up. I guess I am assuming the motor has to be rewound when they burn up?
I attempted to get the motor for my Crafters Station rewound. I checked with three motor shops here in Tucson. When all was done, it was cheaper to buy a new motor.
The cheapest rewind was $350.00. This would have included new bearings and paint (if required).
DO NOT TOUCH THE MOTOR while doing what I am about to recommend. Clamp it to a non conductive work bench.
As for checking the motor - I would secure it on a bench, plug it into an outlet that is switchable and turn it on ( being prepared to turn it off immediately).
If it hums, you might have a chance of reasonable repair. If it kicks the breaker immediately, you just might need a rewind.
"Making Sawdust Safely" Dusty
Sent from my Dell XPS using Firefox.
Do you have a Volt-ohm meter? If so check for leakage(low resistance) from line terminals to frame.
A momentary on/off will probably do as Dusty has suggested(hum/run slow/trip breaker). He left off "RUN NORMAL"! The trip breaker may not be doomsville IF the wiring is shorted rather than in the windings.
I would dismount it and bench test it by first Removing all external wiring(line cord and switch cord). Attach a good condition line cord(2 or three wire) and then 'try it'. Pay attention to how it is originally wired so as to replicate it.
I assume the linecord goes to the motor and the neutral(white) is attached to one motor input terminal. The hot(black) line cord wire should somehow be connected to one switch cord lead. The other(of 2) switch cord lead should attach to a second motor input terminal. The switch connects at the other end of the switch cord(SPST)(two terminals)(one lead each).
For bench testing the switch/cord may be omitted. If you use a 3 wire line cord, make sure there is no leakage to ground b4 testing with power. If there IS leakage, do not connect third wire (green) to motor frame and proceed as dusty suggested(DO NOT TOUCH) while energizing.
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
dusty wrote:DO NOT TOUCH THE MOTOR while doing what I am about to recommend. Clamp it to a non conductive work bench.
As for checking the motor - I would secure it on a bench, plug it into an outlet that is switchable and turn it on ( being prepared to turn it off immediately).
If it hums, you might have a chance of reasonable repair. If it kicks the breaker immediately, you just might need a rewind.
dusty - Can I do the test with it still mounted in the machine? I haven't disassembled it yet. (committed not to work on it til greenie makes first speck of sawdust ). A hum would indicate just a bearing issue or could it go deeper than that?
How far have you taken it apart at this point? Is it possible the motor is fine and the problem is something really simple like a bad switch, or a bad connection on the switch, or bad wiring in the plug or something like that?
With my 2nd ER (which I'm almost done restoring - and I'll post pics when I am done), although the motor seemed to work fine, when I took everything apart, I noticed one lead was connected to the switch by barely a strand of wire. A slight amount of tugging would have pulled it loose.
heathicus wrote:How far have you taken it apart at this point? Haven't' touched it yet. Is it possible the motor is fine and the problem is something really simple like a bad switch, or a bad connection on the switch, or bad wiring in the plug or something like that? I sure hope so
With my 2nd ER (which I'm almost done restoring - and I'll post pics when I am done)Ya, don't you hate it when people tease with photos before it's done , although the motor seemed to work fine, when I took everything apart, I noticed one lead was connected to the switch by barely a strand of wire. A slight amount of tugging would have pulled it loose.
mickyd wrote:dusty - Can I do the test with it still mounted in the machine? I haven't disassembled it yet. (committed not to work on it til greenie makes first speck of sawdust ). A hum would indicate just a bearing issue or could it go deeper than that?
Maybe/YES!!!!!!!!!!! Maybe iff the shaft turns stiffly/hard.
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
mickyd wrote:Ya, don't you hate it when people tease with photos before it's done
Yes, I do. Those people that pull stunts like posting blurry pictures of their almost completed machines should be taken out behind the woodshed and... oh, wait, that was you wasn't it??
In my case, I'm almost done and if I post pictures now, that's where I will stop. If I make myself wait until I am 100% done before posting pictures, I'll be more likely to finish it.
JPG40504 wrote:Maybe/YES!!!!!!!!!!! Maybe iff the shaft turns stiffly/hard.
Certainly. The only purpose is to get a better idea of what is wrong with the motor.
If it hums, DON'T LEAVE POWER APPLIED but for just a few seconds. When it is humming, the motor is trying to turn and during that time is drawing more current than normal. Thus the possibility of smoke which could lean toward rewind.
Then you might try what a reasonable person would do. Pull the motor off and have it tested by a motor shop.
I pay to have work done as a last resort. EXAMPLE: The jointer cutter head that I just purchased. Only in that case, I created the "last resort".
"Making Sawdust Safely" Dusty
Sent from my Dell XPS using Firefox.
JPG40504 wrote:Do you have a Volt-ohm meter? If so check for leakage(low resistance) from line terminals to frame...............
Yes on the meter question. I'll take a more techy 'schpanation on your second sentence. Do you mean with the unit plugged in, not running, test across where the wires terminate at the motor to the headstock or other convenient part of the unit? If this is correct, exactly what is it checking for? Leakage of juice from what and why and how and...?