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'DelTang' Failures - What Am I Doing Wrong ?
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 Posted: Wed Nov 13th, 2019 04:19 pm
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Rick Dow
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I have to admit to not fully understanding what you've asked me to do, Dave. 
(I'm so bad at electronics)

My successful locomotives are running Rx-62 receivers which I can turn on and off,
by placing a magnet near the little square component in one corner of the receiver.

When I place the same magnet near the same square component in the Rx-61,
it does not turn the receiver on or off.

So what I'm used to doing is turning on the red power button on the transmitter first
(it becomes illuminated)
then I remove the top from the locomotive tender to expose the battery and receiver,
then I hold the magnet near the receiver's on/off switch for a few seconds,
and when the LED lights up with a solid light - I know I'm in business.     

Works very well with the Rx-62.   

Make sense?

But, I used a Rx-61 on the last locomotive.    




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 Posted: Wed Nov 13th, 2019 05:35 pm
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davecttr
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Now I am really confused.

My Rx-62's have a reed switch built in,
a long glass tube on the underside,
no square component.

Rx-61's don't have a reed switch,
according to the Deltang site.




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Dave
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 Posted: Thu Nov 14th, 2019 06:26 pm
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Toeffelholm
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Hi Dave, 

I simply think Rick doesn't realise what component on the Rx62 activates the E-switch.


Rick,

It is surely not one of the square chips on the board.
An Rx62 - and only an Rx62- has 2 "R" pads,
and the Rx62 is switched on by shortly connecting these 2 R-pads. 

Basically, it does not matter at all what you use for connecting them. 

It can be done with a Reed-switch soldered to these R pads.
2 very thin metal tongues in a Glass tube with a very short distance,
that come together and close the contact when you hold a magnet near enough.
An Rx62 without a Reed-switch will do nothing when you bring a magnet near to it.

Instead of a Reed-switch you can also solder a push button to the R-pads,
to close the contact and switch the Rx62 on.
As can be seen in my Cat-Switch post.

And you do not have to solder the Reed-switch or the push button directly to the Rx62.
You can place them anywhere in the loco, where you have good access to it.
Just leading 2 wires to the R-pads.

And a magnetic field also works through the plastic of a loco body,
if the Reed-switch is near enough. 


Juergen




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Actual project: 7/8" scale on 45 mm track
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 Posted: Thu Nov 14th, 2019 08:25 pm
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Rick Dow
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Here is the description from the Micron site. 
I use the built-in e-switch all the time on these receivers, and it works well.     

Rx62 is a 5 channel (1 x ESC, 4 x P) DSM2/DSMX compatible micro receiver,
with a built-in reed e-switch. .A suitable magnet is available separately.

The reed switch, or other external switch,
connected across the switch pads on the receiver board,
can be used to switch the receiver on and off.


A brief activation, e.g. by swiping a magnet across the reed switch,
will turn the receiver on.

Switching off can be achieved using the reed switch or the transmitter bind button:
  • Activate switch for >2 seconds, receiver switches off 2 seconds after magnet is removed.
  • Or hold down the transmitter bind button (ch 5) for >5 seconds.
Hope this helps.

Thanks, 

Rick




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 Posted: Thu Nov 14th, 2019 10:12 pm
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davecttr
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Rick, look on the bottom of your Rx-62, you will see the glass tube.

The Micron site description is the same as the Deltang site one.

If there is no reed switch there, the e-switch would not work.




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 Posted: Thu Nov 14th, 2019 10:33 pm
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fallen
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Rick,

This photo of the Rx62 is in the Micron website:

http://www.micronradiocontrol.co.uk/images/gen/dt/dt_rx62-2-n_500.jpg

The reed switch is the glass tube along the bottom of the board.

Frank


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 Posted: Sat Nov 16th, 2019 01:59 am
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Rick Dow
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Frank and Dave.   I SEE IT.  

I just didn't look there, just didn't see it or know what it was, Thanks. 
I see the reed switch now!   Thank you.  (I told you I was bad at this)

Does this mean I should be taping the reed switch side up from now on,
instead of that little square box in the corner on the opposite side? 

:) :) :) :) :)  Gad, this just adds to my legendary foul-ups.

Back to the issue of why my last couple locomotive didn't run. 
Still a mystery (although I admit it could also be a foul-up)
because I was still able to bind the Tx21 and the Rx61. 

Opened up the throttle but no reaction,
so there is a problem somewhere.

When I turned the Transmitter off,
the Rx61 Receiver turned off too. 
Does that make sense?

Getting ready to re-attempt to power the Mantua locomotive,
but this time with the Rx62 instead of the Rx61.  
Fingers crossed.

Thanks again.

Rick




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 Posted: Sat Nov 16th, 2019 11:58 am
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Toeffelholm
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Rick,

You don't have to "tap" anything.  Magnetism works touchless.
You expose the reed switch to a magnetic field in order to close the contact.

How near you have to bring this magnetic field to the reed,
simply depends on the strength of the magnetic field,
and thus on the size and type of the magnet.

And this also works if there is a non magnetic material,
between the magnet and the reed.

E.g. with the smallest neodym magnet I have here, 3mm dia and 4mm length,
I can make the contact close in a distance of about 5mm.
Also with a 3mm plastic sheet in between.


With your Rx61 / Tx21 problem,
you should first check the things that has been told to you before.

- Check if the the Selecta feature is disabled.
Unless, the Rx can't be controlled with your Tx21.

- Check if the center off / low off settings of the Rx61 meets your way of throttle control.

Juergen


Last edited on Sat Nov 16th, 2019 06:15 pm by Toeffelholm



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 Posted: Sun Nov 17th, 2019 03:56 pm
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Rick Dow
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Juergen

I apologize for a lack of detail in my recent post.


I did not mean that I would be physically "tapping" on the reed switch.
But rather I was referring to the fact that when I convert to battery power,
I generally use sticky, double-sided TAPE to secure the Receiver against the roof of the tender. 

Then I bring the magnet near to the spot on the outside of the roof near the receiver and switch it on.


All to say that I will still need to stick the receiver with the same side facing "UP",
in order to look through the hole I have drilled in the roof of the tender,
and discover if the "Power LED" is "On" and "OFF." 
   
Hope I'm writing this in an understandable manner.


The DelTang receivers I use were ordered without Selecta,
because I didn't want that option included. 


At the end of your post you mentioned. 
"Check if the center off / low off settings of the Rx61 meets your way of throttle control."


I have no idea what you are referring to.
When you get a free moment, can you explain further in greater detail?


Thank You

Rick




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 Posted: Sun Nov 17th, 2019 07:21 pm
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fallen
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Hi Rick,

You asked about the "centre off" etc. Options.

The Deltang receivers can be programmed to respond in one of two ways.

"Centre off" means the speed and direction are both controlled by the big knob on the transmitter.
It has a centre position where it clicks a little bit and this is the off position,
turning it one way moves the loco one way, turning it the other way moves it the other way
(so no surprises there!)

"Low off" uses the knob to control the speed,
the full turn takes it from zero to full speed, and the switch controls the direction.
So you have better control of the speed with this option,
but lose the possibility of using the switch to control lights or other things on the loco.

Generally, receivers supplied with the Selecta option have centre off,
but you can ask for the low off option.
Non-Selecta receivers could be either.

It is fairly easy to change the receivers from one option to the other,
so I guess Juergen's point was that if this was not set as you usually had it or has been changed,
then the loco would respond "oddly" ie different from what you expected.
This would add to the confusion.

Another possibility that occurs to me,
is that there is an option where the receiver will not normally start to control the loco when switched on,
until the speed has been set to zero.

This is to prevent the loco setting off at speed when first switched on.
If this is enabled and the centre off/low off option is not what you think,
the loco would not start when you first turned the knob a little,
it might only start after say a full turn which would run through all the possible off positions.
Just a possible cause of the loco not starting.

Hope this helps

Frank


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