A multi-meter is a powerful tool, but resistance tests can mislead you. The Ohm scale on your electrical meter only tests the resistance in the circuit under low voltage with tiny currents. In order to get more accurate readings you must use higher current and check the voltage drop in the circuit. I show how to do this on a bad motor using a cheap power supply.
The multi-meter showed a resistance of 0.1 Ohm between each commutator bar. It showed the armature is good.
But the power supply set at 7amps and 3Volts showed between most bars had a 0.8V drop, but some had 1.4V drop. Meaning some windings have higher resistance under load. This test proved that the armature is weak.
The multi-meter showed a resistance of 0.1 Ohm between each commutator bar. It showed the armature is good.
But the power supply set at 7amps and 3Volts showed between most bars had a 0.8V drop, but some had 1.4V drop. Meaning some windings have higher resistance under load. This test proved that the armature is weak.
Mot having enough whiskey in ir system 😂
Long-lost Canadian brother,
Please if you would be so kind good Sir, as to produce a "good enough to make one dangerous, [READ] very dangerous in deed introduction/explanation/execution of electronics and associated component-ry exhibited in their rudiment form. I'm a career/lifetime machinist/cnc-programmer/set-up guy of all that is deemed my responsibility and obligation, and yet, I find anything beyond a fundamental grasp of Ohm's law, I can call myself nothing more than operating at an alarming deficit of knowledge. In all your pragmatism, surely there can be no other for the job.
Spanks for the video. I had a weekend get fucked…
the knob is missing a little ball bearing and possibly a spring that goes with it
Wise words. A simple doodle of the combar/winding connectivity would show how you're able to test each rotor winding as you've shown. Then again, das ist nicht fur der fingerpoken sans smarts.
If your multimeter is lying to you it's probably a Fluke…
Yeah I know. 🤦
Could of done the whole video with out the fowl language, that most of us do not need or even want to hear. We are supposed to be adults on here and use respectful language in our every day conversations. Too bad not going to subscribe to this childish behavior.
Digital meters are great till they aint. Sometimes a Simpson 260 is much more truthful whenever inductance is involved.
Seeing that aircraft pitot probe just laying on the bench is a little random. LOL
The probes that come with a Fluke (or any other) meter suck noodles for electronics work. Pomona (no affiliation) 6275 are the dog's balls for electronics. Narrow body, and nice, sharp, replaceable tips. Here's a tip for the audience. If your power supply won't drive a short, one ohm or less is effectively a short circuit, you can instead read the voltage drop across a resistor in line with one lead from the power supply. A 10 ohm, 20 watt aluminum body resistor is only a few bucks. 10 ohms because it makes the math easier.
In the words of The School of Appliontology, the Samurai says, "Ohms lie. Trust voltage."
Save for a few faradays an buy a good meter!
Maybe you should refer to this vidjo from latest vidjo.
Here’s a question, why is there a pitot tube on you’re bench?