stan2004 posted:Not familiar with the LGB switch machine.
So are you saying you need a momentary positive DC pulse to fire the switch one way. And a momentary negative DC pulse to fire the switch the other way? This is all do-able but need to be clear on what we're trying to do here! Do you have specs on what kind of DC pulse is needed to drive the LGB switch?
I hadn’t got that far. The LGB motor is DC and requires momentary control. The LGB switch controller actually uses 18V AC power with two diodes to create half wave rectified power to the switch. One diode controls left throw and the other has reversed polarity to control right throw. The switch motor will operate on much lower DC voltage, maybe 9 to 12 volts. I’ve read that the motor actuates in 15ms, but I was planning on a half second to one second. If DC power is used, the polarity must be reversed to throw the switch the opposite direction.
I’m using these drives on tinplate switches that need too much force for a DZ or Atlas motor.
So, the direction of the switch throw required is going to be dependent on which insulated rail is triggered. That either means two circuits per switch or a more complicated circuit I guess...
George
