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Old 08-31-2019, 06:08 PM
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allessence allessence is offline
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Default DoAll DBW-8 Bandsaw blade welder whoas

Well, I went out the other day to make the new anvil stand for the Refflinghaus anvil and I turned the power on the bandsaw and heard a strange noise by the welder.

I listened and it sounded like gear noise. I then went to weld a new blade with no luck.

I then opened it up and the gear drive motor is just spinning away with no power going to it.

It uses power from the anneal switch to power the unit. But when I detach the wire connected to the power distribution it continues to run.

Power to the anneal switch is constantly on. But what would power the motor or what would keep the motor just spinning around?

there is no switch per se. When the power trips after a weld the motor used to stop. It also started once the weld button was pushed. To jog it I could just push the weld button to bring it back into position.



What would keep it running? A short internally? I tested the outside to the chassis and no voltage. I checked the wire that connects to the power distribution and it was 0volts.

the yellow wire is the connection to the motor. I think it might have been replaced previously years and years ago as the tape on the motor itself looks like original.
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Jennifer

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  #2  
Old 08-31-2019, 06:18 PM
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Jenn,
I can't understand the diagram, but does that motor run a cam, that shoves
the one jaw towards the other, during welding ?

I thought DoAlls all ran a simple spring loaded jaw set-up.

If this motor runs the cam, it could be a Stryco welder.

It will spin until it gets satisfied, the jaw dropping into the spot on the cam, and hitting a limit switch.
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Old 08-31-2019, 06:28 PM
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It does have a cam, but no limit switch.

I belive it uses a power in, power in type of deal when the unit is not in welding mode.

Power to both sides vs just 1.

I could be wrong and the reason I came to you guys.
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Jennifer

If I defend myself I am attacked.

My meaningless thoughts are showing me a meaningless world.

My attack thoughts are attacking my invulnerability.

I'd like to think of something smart, but I don't want to hurt myself.

My google+ page

DoALL 36"
Another Johnson model J Project
Lathe? Maybe..... 1958 SBL 13"
Yeti Esseti Aka running welder on 3phase.
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Old 08-31-2019, 06:44 PM
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It's been about 25 years, I own 2 strycos.

They use a similar open frame motor, that runs by a tap from the welding xformer.

So energizing either anneal, or weld, causes the cam motor to spin (or want to)

Somehow, when annealing, the motor does not turn.

On the stryco IIRC there are (3) anneal taps (lo, mid, hi) and a separate
weld tap (how you feed the primary side of the xformer)

IIRC you must "re-time" the cam, and set it in the "drop" for anneal.

When in the drop, the motor doesn't spin.

When ready to weld, you pull the jaw back, and it cocks the cam/roller thingy.
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Old 08-31-2019, 07:04 PM
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there is no way to disengage the anneal function button whether in the cam drop or not. The anneal is aways active.

there is a way to lock the anneal button in for use with the etching tool.

But, it worked perfectly the last time I used it which was about 6 months ago.


I do understand what you mean by the anneal button when in the cam is deenerigized.

There were no missing or broken parts I could see or run trace on.

Now with the information you supplied I will take a closer look, but I spent about 3 hrs just looking and seeing and such. I took off the front plate, pulled the motor assembly, cleaned and lubed the gears.

I did not see an arm to disengage the contact from the anneal button. It does have a lockup so once the weld button is pushed it's a go, until the cam is activated.

the motor spinning around does activate the roller for the cam but all it does is click as there is a linkage but is not connected directly to the anneal function so just spins right on by.
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Jennifer

If I defend myself I am attacked.

My meaningless thoughts are showing me a meaningless world.

My attack thoughts are attacking my invulnerability.

I'd like to think of something smart, but I don't want to hurt myself.

My google+ page

DoALL 36"
Another Johnson model J Project
Lathe? Maybe..... 1958 SBL 13"
Yeti Esseti Aka running welder on 3phase.
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  #6  
Old 08-31-2019, 07:37 PM
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I definitely have nothing helpful to add to this troubleshooting discussion but I've been meaning to mention to you that I've been wearing my DoALL cap ever since you sent it to me 2 years ago during the older sister to the present circumstance. This seems like a good time to say that it is, in fact, present with me in this room.
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Old 08-31-2019, 07:49 PM
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A real quick look without too much thinking just maybe the weld button is stuck on, or somewhat making a connection it should not be.
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  #8  
Old 08-31-2019, 09:50 PM
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Quote:
Originally Posted by GWIZ View Post
A real quick look without too much thinking just maybe the weld button is stuck on, or somewhat making a connection it should not be.
Same thought crossed my mind .

Just activate, cycle it a few time see if the problem clears if does, start to lookink for one.

Have a meter handy and the sw has spade clips remove them. Check for continuity. If the sw is good it will read open unless the button is pushed.

Pep
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Old 09-01-2019, 12:03 AM
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Quote:
Originally Posted by allessence View Post
once the weld button is pushed it's a go, until the cam is activated.
Quote:
Originally Posted by allessence View Post
there is no switch per se. When the power trips after a weld the motor used to stop.
It also started once the weld button was pushed.
To jog it I could just push the weld button to bring it back into position.


Yep a stuck weld switch it switches on the primary power. AND starts the motor.
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Last edited by GWIZ; 09-01-2019 at 02:34 AM.
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  #10  
Old 09-01-2019, 06:35 AM
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allessence allessence is offline
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Thanks guys. Problem is with the stuck weld switch.. Well there is no small switch.

its 2 big contactors that are locked into position via a locking toggle arm.

The cam unlocks the toggle perfectly, therefore, opening the switch. there is a 1/4" space between the contactors.

Power is suppled to the motor though constantly unless you are using the anneal function then power is cut to the motor.

Bad leg?


GWIZ yup that is the circuit line. Thusly I am perplexed.

there are 3 switches. 1 is for the anneal power. 1 is a momentary switch for the annealing process (which is where the motor gets its power from and is energized from terminal 2 on the distribution block and from distribution block 2 thru the transformer on leg 1H.

In other words, it has power all the time. From 2 different sources.
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_________________
Jennifer

If I defend myself I am attacked.

My meaningless thoughts are showing me a meaningless world.

My attack thoughts are attacking my invulnerability.

I'd like to think of something smart, but I don't want to hurt myself.

My google+ page

DoALL 36"
Another Johnson model J Project
Lathe? Maybe..... 1958 SBL 13"
Yeti Esseti Aka running welder on 3phase.
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