You can do the same thing with four SPDT switches (i.e. no relays) if the switches are capable of handling the current required by the motor with slightly different wiring. I prefer the relay-based solution, though, because it is easier to adapt to both manual and remote control situations and because you can use smaller SPST switches.
Frank P.
On 12/16/2010 12:10 PM, neroc wrote:
Frank I have read the following section from your NG build page :- " the elevate system shows two limit switches, which are used to control the range of elevation. The metal dial indicator is welded to the axle of the elevate motor and trips a double-throw switch at either extreme." for some time ( years in fact ) I have wanted to copy this elevate system for my own FA piece but have never understood how it is wired , could you please provide a wire diagram for the electricly uneducated. Thanks Neil R
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Motor Control - Relays & Limits.pdf
Description: Adobe PDF document
