back to 2025.08.31 open rotors

old rotor:


This rotor has definitely seen some use. Besides the bolt that will need to be extracted, the wiring plate on
the bottom is heavily rusted and the screws cannot be removed. I'm going to have to unsolder it on the inside
and drop the whole thing in the evap-o-rust and see what I wind up with. Other than that, the housing looks to
be in good condition.

Opening it up, the motor, gearing, and position resistor all look good. The upper bearings look very good, but
the lower bearings are a little rusty. I see no damage on the ring or reduction gears either. The positioning
notch in the top housing has a surprising amount of wear.

This is an older model with a "knife" style brake, and it's in pretty bad shape. The knife itself looks okay,
but the lower housing's teeth are badly stripped in several places, with a millimeter or more of tooth missing
in areas. The brake has gone through a lot of forced-rotation, stripping out the lower housing. It probably
can still hold a small beam in place, maybe a 2m, but it'd need a new lower housing for anything bigger. Or
maybe just replace the housing and solenoid head for the newer notch design if needed. I don't think the teeth
got broken off - they look like they were just ground through over time.

There's a number stamped on the bottom but nothing specifically saying which Ham model it is. The older brake
was only on the Ham-M (Ham-1) and Ham-2, although I think the Ham-M used a smaller housing, so this one
is probably a Ham-2.

2025.08.31 19.43.22	2025.08.31 19.43.54	2025.08.31 19.46.42	2025.08.31 19.46.54	2025.08.31 19.48.10	2025.08.31 19.48.24
2025.08.31 19.48.40	2025.08.31 19.49.00	2025.08.31 19.50.16 zoom	2025.08.31 19.50.16

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