Hi Ewan, been following the issue with the 24v motors. I bought a couple of motors some time ago which I have not used yet. (I did actually try them out on a power supply to check they work, which they did) I took a closer look at the brushes today as Gary had pointed out the problem seems to crop from this area. It seems the brushes are mounted incorrectly, from the photos it's clear - they seem to be 90 degrees out of phase, and contact with the commutator is just on two points. I noticed when I tried them out that they sparked quite a lot, could have something to do with this?
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