Author Topic: A new type of switch machine?  (Read 174 times)

Donato

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A new type of switch machine?
« on: February 05, 2018, 08:48:40 PM »
I have seen a variety of different methods utilized to move the points on our turnouts. Motors, rods and levers, servos etc. While surfing for some micro motors for some experimentation, i came across these little gems. They are micro stepper motors activating a linear screw. They are cheap and easily adapted mechanically to operating the turnout from below the layout. My question to our more electronically knowledgeable brothers, how hard would it be to wire these little puppies to do the job without going into too much elaborate use of micro controllers....just a plain dpdt switch...!!

http://www.ebay.com/itm/DC5V-2-Phase-4-Wire-Miniature-8mm-Stepper-Motor-Mini-Stepping-Motor-Linear-Screw-/263016192408

Thanks,
Donato

Biding my time till I can start my layout and build nice stuff like all you folks .... (said with envy). :-)

jbvb

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Re: A new type of switch machine?
« Reply #1 on: February 08, 2018, 12:18:34 PM »
The reason they're called 'stepper motors' is because they move in increments.  Typically, there are multiple coils.  You hold it in place by putting voltage on one coil.  You move it one step by putting the voltage on two or three more coils, in sequence, then switching it back to the first.  You could run one of those by twiddling a rotary switch, but your wrist would get tired long before you got the points from one locked position to the other: most steppers only turn a few degrees per cycle.
James

Donato

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Re: A new type of switch machine?
« Reply #2 on: February 08, 2018, 10:26:06 PM »
Thanks James, didn't realize that.
Thanks,
Donato

Biding my time till I can start my layout and build nice stuff like all you folks .... (said with envy). :-)

 

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