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Show"N"Tell ( Your Machines) / Re: My first attempt at a CNC build.
« on: April 02, 2010, 03:52:15 AM »
With regard to your limit switches - It is better to run two wires because the machine frame is not always all at the same potential (moving axis for example may only be electrically connected to the main frame via the slides bearings). Also ground loops are a potential source of noise pickup and subsequent problems. Don't forget to used screened cable (grounded at the controller end only, preferable to a single point ground connection).
Tweakie.
Tweakie.