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Commutator out of roundcauses arcing - Freud FT3000VCE Router

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Sole 235 elliptical causes static that interferes with the tv and pvr.

the machine has has front drive system which indicates an electric motor
static can be caused by brushes arcing on the commutator bars
that would require a check by an electrician or technician
removing the rubber mat will do nothing as I suggested
the arcing is causing the static so it is severe
if the machine is under warranty , get it checked by a warranty technician or service agent
failing that the capacitor is fitted across the power and neutral points at the back of the power point

Feb 07, 2017 | Exercise & Fitness

1 Answer

Makita LXDT04 Impact Driver Sparks coming out of it

It could be that your brushes (PN CB440) are worn down so much that they can't make full contact with the armature or the armature (PN 619247-1) has a short in it causing excessive arcing. This would be evident by excessive burning or pitting on the commutator where the brushes make contact or missing sections of the commutator..

May 15, 2014 | Makita BDF452HW 18V Cordless Lxt Lithium...

2 Answers

When I run my Makita Impact wrench one of my brushes spark what is the problem

One can expect a small amount of arcing from a carbon brush. If one brush is arcing more than another, or if the arcing is following around the diameter of the commutator toward the other brush, the brushes need to be replaced and commutator cleaned with a commutator stone.

Apr 11, 2014 | Makita 6906 9 Amp 34Inch Impact Wrench

1 Answer

Bosch GSB 16 RE armature overheating

armatures over heat from 3 problems 1 The brushes are worn out and there is heavy arcing on the commutator bars causing excessive heat and 2 the armature is shorting out 3 the armature is touching the field shoes from worn out bushes/ bearings ( poling out). have an appliance electrician check it out.

Jun 02, 2013 | Saws

1 Answer

Carbon brushes burn out too fast

you possibly have an armature problem causing them to arc and burn fast. look at the commutator for unusual discoloration and raised comm bars.

May 16, 2010 | Bosch Brute Breaker Hammer 11304

1 Answer

Dewalt flip saw keeps blowing fuse

common problem with this saw is the brushes when worn down to about half inch, won't go into the brush holder any further and starts to arc against the commutator. eventually the heating will burn out the commutator. a replacement armature will cost you $75 plus shipping.

Oct 20, 2009 | Dewalt DW746X 10" woodworker's table saw...

1 Answer

After replacing the brushes in my old Rockwell belt sander there is excessive arcing between the brushes and the oommutator and the unit doesn't come up to full speed.

Did you dress the brushes to the contour of the commutator?

You wrap the commutator with fine sandpaper and rotate under the brushes till the curve conforms.

If this does not reduce the arcing, then you may have an armature with a bad winding.

Sep 30, 2009 | Bosch Tools & Hardware - Others

1 Answer

Just replaced the brushes on a WE14 150 Quick 6 Grinder and sparks now come from the brushes

From my own experience.

Are the strips of the commutator smooth and flat?
(Not to insult you. The part of the armature that the brushes ride on)

If they aren't, the brushes will bounce up and down.
I put one end of the armature in a drill, and have a helper run the drill. The other end of the armature rests in the front bearing of the grinder head, which is fastened down. (To a bench) Then I use a medium tooth, (B astard) file to dress the commutator bars flat.

I also put medium grade sandpaper in-between the brushes, and the commutator surface to dress an arc on the brushes. (Turn the armature by hand while keeping the sandpaper in place)
Brushes come with a flat surface. Putting a radius on them to fit the arc of the commutator, gives them a good contact surface to start from.

Be sure the springs are putting pressure on the brushes. Sometimes the brush mounts need to be cleaned, or the brush will not slide through the mount like it should. The brush will again, 'Dance' on the commutator. (Bounce up and down)

Sep 06, 2009 | Metabo WE14-150 Quick Angle Grinder

1 Answer

Brushes arc severly at point of contact with commutator. More than just brushes not seated. Comm. is round clean and looks good. Stator has been changed. Made no differance. Brushes are good.

If the brushes are long enough, severe arcing is often CAUSED BY FAILURE of one of the windings on the armature, NOT the stator.

Either an open or shorted winding will cause this. Use an ohmeter between adjacent segments to check the resistance. The resistance can vary by say, 10%, but if you find one pair that is outside that a bunch, look for broken wire near the commutator that you might repair, but beyond that, you usually have to replace the armature.

Sep 04, 2009 | Saws

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