Following the previous discussion I have documented the techniques I
use for mounting below and through the board, with the pros and cons
of both.
Guy
- posted 11 years ago
Peco point motors 2: The Sequel
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- posted 11 years ago
But you havent told us how you are getting on !
Cheers, Simon
Cheers, Simon
- posted 11 years ago
One of the buggers still won't operate even with a CDU (and yes I did
already knew about these, I had to build a second one because they
don't function well at more than about 3' distance).
Does anyone know if the Aussie electronics bloke ships his CDU PCBs to the UK? I don't have the kit for etching or the enthusiasm for getting it, and building on Veroboard is always a bit of a chore. Guy
Does anyone know if the Aussie electronics bloke ships his CDU PCBs to the UK? I don't have the kit for etching or the enthusiasm for getting it, and building on Veroboard is always a bit of a chore. Guy
- posted 11 years ago
You never did say what power source you are using ?
Plus it is possible to wire them the wrong way round.
Cheers, Simon
Cheers, Simon
- posted 11 years ago
[ob. Peco point motors]
I've tried three power sources: a Peco CDU, a 12V DC line with a 2200µF can (charged via a 2k2 resistor) and directly on 16V AC.
What do you mean the wrong way round? Guy
I've tried three power sources: a Peco CDU, a 12V DC line with a 2200µF can (charged via a 2k2 resistor) and directly on 16V AC.
What do you mean the wrong way round? Guy
- posted 11 years ago
So they try to close point when should be opening it.
- posted 11 years ago
They have two solenoids, one drives on and one drives off. The problem
motors usually drive one way fine but not the other.
Guy
- posted 11 years ago
Probably a mechanical problem - coils out of alignment or something like
that causing friction on the armature.
- posted 11 years ago
If you mean DCC Concepts of Perth then yes, his UK distributor is Bromsgrove
Models.
- posted 11 years ago
Quite likely you have the point motor mounted too far one way - ie,
off-center.
Assuming they/it is below baseboard, have someone hold the motor in the
center
position and then look at the point/tie bar and make sure it (the pointsd)
is
sitting equidistant to both stock rails.
If you haven't got a second person then shim between point blades and stock rails and adjust the point motor so the operating pin is centered between the solenoids.
Greg.P.
If you haven't got a second person then shim between point blades and stock rails and adjust the point motor so the operating pin is centered between the solenoids.
Greg.P.
- posted 11 years ago
Every Peco point motor I have see has been so sloppy beteeen armature and
coils that bits of ballast or moths could squeeze through.
Greg.P.
Greg.P.
- posted 11 years ago
I really don't think so, I have gone to extraordinary lengths to get
it aligned correctly.
I'll have a go, but I am pretty confident that some motors are just "lazy". Guy
I'll have a go, but I am pretty confident that some motors are just "lazy". Guy
- posted 11 years ago
They arent push pull then depending on which way current going through ?
Just seems curious that you are having trouble with so many, suggests youor doing something strange or bad batch. Where did you get them from ?
Cheers, Simon
Just seems curious that you are having trouble with so many, suggests youor doing something strange or bad batch. Where did you get them from ?
Cheers, Simon
- posted 11 years ago
Bad batch I had not considered. They came from Hattons and yes they
were a job lot.
Guy
- posted 11 years ago
Hattons ;-) Fingers quiver above keyboard - but dare not comment cept wont
touch with .....
Cheers, Simon
Cheers, Simon
- posted 11 years ago
No, the pole piece is just soft iron and will get pulled to whichever
end is energised regardless of the way the current is applied (or if ac
is used to energise it).
Jeff
Jeff
- posted 11 years ago
The armature is soft unmagnetized iron and the coils each drag the iron
armature in to the end they are situated at.
Kato is probably the only manufacurer doing single coil motors which
push or pull a magnet depending on current polarity.
A problem with using DC (CDU) is that the soft iron core can get magnetized if power is applied for more than a fraction of a second - luckily, throwing the turnout the other way reverses the process.
Greg.P.
A problem with using DC (CDU) is that the soft iron core can get magnetized if power is applied for more than a fraction of a second - luckily, throwing the turnout the other way reverses the process.
Greg.P.
- posted 11 years ago
I thought that one of the properties of soft iron is that it doesn't
retain magnetism after the electromagnetic field is removed ie at room
temperature and above the magnetic domains return to a random pattern
unlike in steel where the impurities such as carbon atoms prevent the
domains from returning to a random pattern after they have been aligned by
an electromagnetic field.
Alan
Alan
- posted 11 years ago
=A0
That's all you should get with a CDU.
That's the point of using a CDU, a far bigger wallop that the power supply could supply by itself, for a very short period.
MBQ
That's the point of using a CDU, a far bigger wallop that the power supply could supply by itself, for a very short period.
MBQ
- posted 11 years ago
Up the input voltage to the CDU and increase the capacitance.
MBQ
MBQ
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