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Equipment/Lathe: Difference between revisions
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Update mini-lathe motor status.
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(Update mini-lathe motor status.) |
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=== Updates === | === Updates === | ||
==== Update 02/06/2013 ==== | |||
[[user:Asoko|aaron]] The brushes for motor are still too loose, but at least I've figured out how to put it back together correctly. I've marked the motor with 1/2/3 for each of the screws, so that particular problem won't happen again. As for the brushes, they need to be more precise. Either we have to find some that are manufactured to the correct size, or we need to figure out how to trim them to size with a much higher tolerance. Maybe milling? | |||
To test the brushes, I took the motor apart and sanded the commutator, using a wooden jig clamped to the table and a power drill to spin the motor (taped the motor cog to the handle of a crappy screwdriver). Got all the burn marks off, but when I spun up the motor, it started sparking again, although less than it used to, and disassembly revealed that the burn marks had returned. Both of the brushes, one more than the other, have some visible play in them. Also, looking at one of the brushes, it's clear that it's contacting the motor on the edge rather than in the centre. I think that the brushes, because they can wiggle, are tilting a bit and catching on the edges of each commutator contact, which makes them bounce instead of staying relatively still. | |||
I've left the lathe disassembled, with the screws in a tray in the top drawer under the lathe, as well as the motor and some other bits. | |||
As a sidenote, I've removed and disassembled the backboard for the lathe stand. It's very unsafe to store tools behind a lathe, because it tempts people to reach over a spinning lathe to retrieve the part they need. The shelves below provide plenty of storage. | |||
==== Update 13/03/2013 ==== | ==== Update 13/03/2013 ==== | ||
