A switch housing body has a base and a sidewall having an axis and extending from the base to a rim and having a pair of axial slots. A switch cap has: a cap body having a top web; and a sidewall extending from the top web to a rim and having a pair of holes. A shaft passes through the pair of axial slots and pair of holes. A spring biases the cap axially away from the housing from a compressed condition to an extended condition. A cap electrical contact and a housing electrical contact have an electrically closed condition at the compressed condition.

Embodiments relate generally to milling machines and milling techniques, and more particularly, to apparatuses, milling machines and methods to control automatic loading and/or unloading of work pieces in relation to the adverse milling machine environments. In one embodiment, an apparatus includes a subset of guide members constituting a staging region, a loader member configured to impart a loading force unto the work piece to transition the work piece from the staging region, and an effector coupled to the loader member. The effector is configured to apply a cleaning force to a path in a first interval of time and is configured further to transfer the loading force from the loader member to the work piece in a second interval of time, and an alignment device configured to align the subset of guide members and the effector to form a portion of the path in a first mode.

A bonding apparatus that executes a bonding process of bonding a second member to a plurality of regions of a first member, comprising a scope, a bonding mechanism configured to bond each of a plurality of second members to one of the plurality of regions, and a controller configured to execute a decision process of deciding positions of the plurality of regions by measuring, using the scope, a position of a selected region among the plurality of regions and control the bonding process based on the positions of the plurality of regions. The controller decides to re-execute the decision process in accordance with a situation of the bonding process.