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Old 12-04-2018, 11:41 PM   #31
Tricky Dicky
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Originally Posted by Steve M View Post
The PM1 has an inbuilt switch that allows for either frog polarity switching on electrofrog points or it can be used to switch lights on a mimic board. The PM2 does not have the inbuilt switch.
Just be aware that some say the switch can be unreliable if the point motor is not perfectly set up. Personally I would fit the PM1 even if you don't need the switch now but you may want it later.
No doubt others will be along to extol other types of PM but these are simple and a great place for the novice to start with as they learn the ropes.
P.S. I have around 120 on my layout and very few problems have occurred - although I don't rely on the switch for frog polarity just in case.
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Richard
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Old 12-04-2018, 11:46 PM   #32
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Originally Posted by Tricky Dicky View Post
The PM 1 has a built in changeover switch which is activated by the movement of the armature in the motor. This can be used to switch indicator LEDs or more commonly to switch the polarity of the frog in electro frog points rather than rely on the rail contact. Unfortunately it is not a particularly good design of switch consisting of a washer that slides across a couple of pads on a circuit board and is known to fail over time due to wear on the pads or oxidation. You might be better sticking with the PM 2 without the switch which is a perfectly sound motor and if you want frog polarity control use a micro switch activated by the movement of the tie bar in the point.

Richard
That cleared it up excellently.
Thank you.

I'm happy with the pm 2 by the sounds of it.
Thanks again.
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Old 13-04-2018, 10:25 AM   #33
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would these switches work with PM-2 motors?

From hattons.
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Old 13-04-2018, 10:34 AM   #34
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No they appear to be On/On type.
You Must use (On)-Off-(On) momentary also called non locking sprung to centre Off type. Like these... Link to Hattons
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Old 13-04-2018, 09:43 PM   #35
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No they appear to be On/On type.
You Must use (On)-Off-(On) momentary also called non locking sprung to centre Off type. Like these... Link to Hattons
thanks for your expertise flashbang, wiring and electrics isn't something I've done since uni and even then it was one class, which I did enjoy tbh, but I think I've found some decent switches from Maplin, good old closing down sale.

Maplins


also, would I need a CDU for 7 points on my small layout.
I am planning on having two points throwing at the same time as they are a run round section.
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Last edited by oncomin5torm; 13-04-2018 at 09:51 PM.
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Old 14-04-2018, 10:47 AM   #36
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Originally Posted by oncomin5torm View Post
thanks for your expertise flashbang, wiring and electrics isn't something I've done since uni and even then it was one class, which I did enjoy tbh, but I think I've found some decent switches from Maplin, good old closing down sale.

Maplins


also, would I need a CDU for 7 points on my small layout.
I am planning on having two points throwing at the same time as they are a run round section.
Hi
The Maplins one, if available due to them closing, are good value and the correct type too.
See this reply today to Yelow re CDU... http://www.modelrailwayforum.co.uk/s...ad.php?t=13856
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