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Hi my 400as50 has stopped welding. Put new capacitors in it and has been working fine until now that was 3 months ago. All brushes and slip rings are all good.

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

reddevil6
  • 1673 Answers

SOURCE: Brushes not working

Check the filter from the bottom, it has a red frame, pull it out far enough to clean it, if it is clooged, then the brushes won't spin. If it is clean, pull the brush block out, make sure the shaft that goes up into the turbine is not brokked off, if it is replace thebrush block. With the brush block out, turn on the machine and look up where the brush block goes, there is a square hole, if it is turning, then it is ok, if not, then the turbine is either clogged up or the turbine has gone bad.

Posted on Jun 21, 2008

  • 11 Answers

SOURCE: no weld output or 115v output

Hi
My name is rob, lets see if we can solve your problem

If the welders been working ok first question is what has changed, has it been moved or modified in any way?

Next, are ther any fuses or breakers fitted? are these ok?

Next, most engine driven welders have one major problem.
Vibration.

It shakes stuff loose, undos connections and damages static components,
Take some covers of to expose the internals and with THE ENGINE STOPPED check along the length of the cable harness especially at the ends of cables, give each terminal a tug with the cable to make sure there are no problems there. Also check the condition of the insulation of the harness along its lenght. at this point you may find a "hidden" in-line fuse somewhere in the harness if your lucky!

If none of this helps it gets a little more tricky, could you give me make and model? that would help a lot.

Regards
Rob

Posted on Feb 08, 2009

SOURCE: have no weld or power output from a miller starfire 2e

did you check the breakers im talking about the ones on the unit either switch or push button you can only reset them so many times what happens is there like a set of points in an old chevy they start to get pitited bigger the pits the less power you get less amps are produced just because the reset dosent mean they are giving 100 % you can bypass one and see what happens to that drill you should be happy with the out come zaper fla

Posted on Apr 24, 2010

  • 142 Answers

SOURCE: I have an older model Niagara 4kw by generac with

I have not seen yor generator in practice, but saw some pictures of it.

As it is an older model, but it is not rare for modern generators too, when they stay a lot of time (3 years is a good lot of time), they lose thier magnetism.

In order to build the magnetic field up again you can connect for a short time (1 - 3 seconds) by a working motor, a 12 V battery to the field terminals, + and - respected. A series diode 10 - 25A to battery can stop the built up field voltage to overcharge the battery.

Posted on Aug 01, 2010

Testimonial: "Thank you for the prompt reply - it seems to make sense and I'll try it."

  • 691 Answers

SOURCE: My front passenger, rear driver

Check the master window control panel on the drivers door. There is probably a lockout switch. It may have a window outline on one end and the same outline with an "X" over it on the other. Press the outline without the "X" and all your windows should work again.
As silly as that sounds, a lot of folks hit the lockout switch and don't know it. On the other hand, the lockout switch is bad.

Posted on Aug 03, 2011

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Hi i have a Black max, Powermate Generator model #PM0496750 ,6750 watt it run great for 3 hrs and then stop generating,,, clean the frets on rotor where brushes runs on and its good for another 3 hrs then...


You have excessive arching on the rotor slip rings by the sound of it, if you clean them and it works well then 3 hours later same problem? What is the conditon of the brushes? Also I trust youa r enot cleaning polishing them with sanpaper etc, they have a very fine finish and should be polished with a super fine grit paper or stone, pref while turning the engine. Any scratches won't work

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Oreck roller brush problem


The belt is just stretched. Replace it with one from a vacuum store not a discount store they ARE different. It can happen easily. That's the only thing it could be.

Good Luck!
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The Belt:
http://www.vacuummedic.com/product.php?id=257

More info on belts:
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Generator ran fine all day. refueled then no power


I am assuming after re-fueling your output power stopped working. If this is the case then remove the small cover from the end bell and inspect the brushes. They must touch the slip ring. The best way to check to see of the brushes are touching the slip ring is to use a multi-meter on a Resistance scale of R x 100 or R x 1000 and you should see a very low resistance reading. If you have a high resistance reading or an open indication on the meter; the brushes are NOT touching the slip ring. They are either too short from use or damaged due to breakage or heat caused by loose connections.
Inspect the brushes one at a time. There should be at least 3/8 inch of visible carbon brush. Anything less and it is time to change the brushes.

If you need more assistance or I completly missed the mark respond here and I wil help you.
Thanks for choosing FixYa,
Kelly

Aug 29, 2011 | Coleman Powermate Powermate 5000W...

1 Answer

Stop produceing power after only 20 of running


Hi and wleome to FixYa, I am Kelly.

Pull off the small cover on the OUTSIDE of the end bell that covers the bearing and the brushes. Using a meter on resistance scale of R X 100 or R x 1000 probe the brushes and see if you read any resistance You should see a reading of much less than 1000 ohms that would be the rotor winding resistance. If you do not have resistance then remove the brushes and check the condition and LENGHT of the brushes. The brushes should be no less than 3/8" long. If you can get your test leads into the brush holes probe the slip rings and read the rotor resistance. You must read resistance under 500 Ohms. No resistance or can not reach the slip rings remove the end bell and test rotor resistance again but probing the 2 slip rings.

Most of the time the brushes wear out or break off when a generator just suddenly stops working.

Reinstall the end bell and read for a DC voltage reading of 3 - 9 volts across the brushes after you know the brushes are in good working order. No voltage then the AVR has failed. If you have voltage then the final tests would be continuity checks of the diode and capacitor in the end bell and finally the stator windings. The dilde will ony read resistance in ONE direction. It should NOT read open or shorted in both directions. The capacitor check use R x 10,000 and probe the capacitor terminals. Reverse the leads and probe it again. You should see a brief jump in resistance and the meter will drift to infinity EACH time you reverse the leads.

If you want parts information I need the model number off of the unit data plate to get that information for you.

Thanks for choosing FixYa,
Kelly

Aug 25, 2011 | Coleman Powermate Powermate 5000W...

1 Answer

No weld output or 115v output


Hi
My name is rob, lets see if we can solve your problem

If the welders been working ok first question is what has changed, has it been moved or modified in any way?

Next, are ther any fuses or breakers fitted? are these ok?

Next, most engine driven welders have one major problem.
Vibration.

It shakes stuff loose, undos connections and damages static components,
Take some covers of to expose the internals and with THE ENGINE STOPPED check along the length of the cable harness especially at the ends of cables, give each terminal a tug with the cable to make sure there are no problems there. Also check the condition of the insulation of the harness along its lenght. at this point you may find a "hidden" in-line fuse somewhere in the harness if your lucky!

If none of this helps it gets a little more tricky, could you give me make and model? that would help a lot.

Regards
Rob

Jan 29, 2009 | Miller Welding Tools

6 Answers

Miller Big 40 will not weld and has no current at the A/C outlet


open inspection door,which also the fine tuner knob is ,there's a 2x4 size circut board that snaps out with little force to remove,this is the voltage regulator board,look for 4700 ohm resisitor burnt into,tv tech can fix or order new board at $227.00 what i paid.

Jan 23, 2009 | Welding Tools

2 Answers

No Display on my Samsung 204B monitor


If you know how to open it up and get to the power supply you will find three capacitors 2-820uf and 1-330 @ 25vdc 105o.they will have puffed up tops replace them. FYI the monitor has a 3 year warranty.

Dec 12, 2008 | Samsung SyncMaster 204B 20.1" LCD Monitor

1 Answer

No power to weld or use A/c power outlets


You don't say what model welder you have, some Miller welders have 3 slip rings and brushes some have just 2. In either case the next step is to use an ohm meter to check the resistance of the rotor and brush assembly. If this is a 2 slip ring model, take one of the wires off of one of the brushes then measure the resistance between the 2 brush terminals - it should be something between 10 and 100 ohms. If you get an open circuit measure the resistance from one slip ring to the other right at the slip rings - if you now get something other than an open you've got bad brushes (about $10 each to replace),

The 3 slip ring models are similar but have 2 rotor windings - take off the wire from the middle brush and measure from it to each of the ends.

If your rotor and brushes checked out OK you should next check the fuse in the exciter circuit, this will be on the block where the other end of the brush wires go.

If the fuse was good you need to do an excitation test. This is a bit dangerous so be careful. Look at the schematic pasted inside the case and figure out which brush is the positive (+) one. The wires are numbered and so is the schematic so this isn't as hard as it might seem.
Disconnect the wires from both brushes (all 4 wires in the 3 slip ring model) and tape them off so you won't get shocked. Get a 9V battery or make up jumpers that will let you connect the welder battery to the brushes. Start the welder and connect your temporary power supply, measure the AC at the outlets (it should be around 60VAC with a 9V battery) and the DC voltage at the weld terminals (should be above 10V), lastly measure the voltage at the wires you disconnected from the brushes (should be around 70V DC). Disconnect the temporary power supply and shut down the welder.
If you didn't get AC at the outlets and DC at the weld terminals above, something is wrong with the stator in your welder. If you didn't measure any DC on the wires that go to the brushes (most likely thing to happen), you've got something wrong in the exciter circuit. Check the rectifier, the capacitor, the exciter winding in the stator, and lastly the current control board. Older welders will also have the fine current control rheostat in this circuit (look for burned windings on it).

That's about all of the general advice I can give you without knowing more about which welder you have.

Carl

Oct 23, 2008 | Miller Welding Tools

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