The Ford Barn

jhowes · 11-15-2017, 09:37 AM

I made all of the measurements that were suggested.
1. motors and draws 15 amps when motoring and the motoring is very lame.
2. Insulated the third brush from the commutator and applied negative 6v to the third brush---drew 3 amps with the negative on the third brush.
3. Checked for continuity between the commutator and the shaft of the commutator and it was clear.
4. Checked between opposite segments on the commutator and found good continuity, no apparent problems. Very few OHMS.

Yet the generator does not charge except when the motor is at a high RPM and then it's not adequate.
Any more thoughts??? Jack

Tom Wesenberg · 11-15-2017, 11:53 PM

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I wonder if someone turned the armature iron core part, thus increasing the air gap. The smaller the sir gap (armature to field), the better the output. I've come across two armature where this was done, and I had to replace the armatures. Never turn the core, but only use a wire wheel to remove rust.

Has the armature been checked on a growler?

11-15-2017, 09:37 AM	#1
jhowes Senior Member Join Date: Jul 2010 Location: upstate NY near Mass border Posts: 789	Generator again---Tom W. I made all of the measurements that were suggested. 1. motors and draws 15 amps when motoring and the motoring is very lame. 2. Insulated the third brush from the commutator and applied negative 6v to the third brush---drew 3 amps with the negative on the third brush. 3. Checked for continuity between the commutator and the shaft of the commutator and it was clear. 4. Checked between opposite segments on the commutator and found good continuity, no apparent problems. Very few OHMS. Yet the generator does not charge except when the motor is at a high RPM and then it's not adequate. Any more thoughts??? Jack

11-15-2017, 11:53 PM	#2
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Generator again---Tom W. Sponsored Links (Register now to hide all advertisements) I wonder if someone turned the armature iron core part, thus increasing the air gap. The smaller the sir gap (armature to field), the better the output. I've come across two armature where this was done, and I had to replace the armatures. Never turn the core, but only use a wire wheel to remove rust. Has the armature been checked on a growler?