User:Wm Seán Glen

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My name is Seán Glen and I repair machine tools for Boeing. I work on CNC and conventional machine tools. I plan on starting or contributing to articles on machine tools. I realize that this is not a "how to" forum but there needs to be some background information on a technolgy that affects nearly every manufactured item in the world.

Machine Tool Concepts

What is and what is not a machine tool?

What is an axis? Why are axes perpendicular to each other?

Rigidity

Accuracy vs Tolerance

Repeatability

Feedback loops and nested feedback loops

rotating motion and force vs linear motion and force

Component parts

Bed

Ways

Leadscrew, acme, smooth and recirculating ball

CNC (computer numerical controller)

PLC (programmable logic controller)

Servo drives, spindle drives, variable speed electric motors (rotating and linear) stepper motors, indexers

Inputs, switches, sensors, logical inputs

Outputs, indicators, relays, motor contactors, logical outputs

Communication

Seán 04:55, 8 March 2006 (UTC)