Just a quick post, but the other day, my Roomba proceeded to suck up a baby wipe (that my son had apparently left somewhere randomly and I didn’t see while picking up the main floor before bed), and the brushes jammed up enough that it didn’t trigger the “clean brush” warning, but probably overheated the Cleaning Head Module (CHM) motor (see picture). After removal, the brushes refused to run. Spinning the brushes manually was easy, so it wasn’t physically seized. Unfortunately, replacing the motor (eBay) is basically the same price as buying a whole new CHM. Checking the electrical resistance on the motor was about 8ohms. Not too bad, but, I’ve never cleaned the motor, so I gave it a few good squirts of DeoxIT, and spun it a while. Checked the resistance again, and it was 22k ohms. Huh. Hooked it up to my bench PSU at 9V, and powered it up. Nothing. Crap.
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