I had a similar problem with a unifrog turnout, found the frog wire was touching one of the feed wires under it. Should have insulated the frog wire before installing it.

Re: Reverse Loop Within a Reverse Loop

#13123

Tom,

You used the word siding.? Does it go anywhere else?? If not, you can probably feed the siding from the same auto reverser (Tam Valley reverses) that powers the loop.??

Allan Gartner
Wiring for DCC

Reverse Loop Within a Reverse Loop

#13122

Hello All,

I have one feeder for both loops?

Each Loop? has a TAM Valley Dual Frog Juicer setup as a Auto reverser.

The reverse loops are working fine.

My question is?

On my one reverse loop? I have a turnout that comes from a siding that is not in the loop.

When? a train enters the siding from the loop all works?

Then problem is when the train leaves the siding I get a short.? So I have a polarity problem.

Is it possible to wire this so I can have the polarity changed? from the siding?

The siding is it own block and has one feeder and is isolated at both ends with insulator joiners on both rails.

If you need more detail let me know.

Thanks

Tom Grassi

Working on my Layout I have two large reverse loops?
--
Tom Grassi
trgrassijr@...

Re: Wiring for DCC Update

#13121

Thanks Allan,
Greatly appreciate all you do.
- Michael

Wiring for DCC Update

#13120

All,

I have made a couple of additions to the Wiring for DCC Website:

1.? Link to Evan Designs.? They provide a wide variety of miniature LEDs useful to the model railroader.

2.? The new Walthers DCC Friendly turnout.? Very nice!? I featured this turnout in my November 2021 DCC Currents column in Model Railroader.

Both topics can be found in my website at:??

Enjoy!

Allan Gartner
Wiring for DCC

Re: Auto reverse area “dead”

#13119

开云体育

See below.

Blair

On 10/12/2021 10:55 AM, Charles Cauble wrote:

This morning I went through all the steps verifying that the psx-ar is still working correctly. Then I rewired the frog on the left of the peninsula because I didn’t see it blink on the juicer. ?It does blink when the loco tries to do the turn out but then the loco stalls and shorts off the power block. ?The loco makes it through both peninsula turnouts if they’re left straight but stalls on the left when doing a turnout. The right one works. I also noticed that the psx-ar doesn’t blink when first turned on and does the slow blink once the loco enters the isolated section

Okay, so it reversed the outputs when you entered the section.

but it continues to blink from then on whether you go in or out of the isolated section.

Crossing the same gaps?? Once they're aligned, nothing will change.? But if you mean you are crossing the gaps at one of the other ends of the reversing section, it will depend on whether you're aligned with them or not.? If you've been messing with the wiring, it's hard to tell.? Honestly, you need to give us more details.

I assume that since I proved the chip the current at this stage of my layout does not need reversing again.

That did not make sense.

I’m trying to layout and drop track temporarily to see if my lack of completion on other sections is not reversing on the conflict at the left switch.

And that didn't either.

.......Charles

Re: Auto reverse area “dead”

#13118

This morning I went through all the steps verifying that the psx-ar is still working correctly. Then I rewired the frog on the left of the peninsula because I didn’t see it blink on the juicer. ?It does blink when the loco tries to do the turn out but then the loco stalls and shorts off the power block. ?The loco makes it through both peninsula turnouts if they’re left straight but stalls on the left when doing a turnout. The right one works. I also noticed that the psx-ar doesn’t blink when first turned on and does the slow blink once the loco enters the isolated section but it continues to blink from then on whether you go in or out of the isolated section. I assume that since I proved the chip the current at this stage of my layout does not need reversing again. I’m trying to layout and drop track temporarily to see if my lack of completion on other sections is not reversing on the conflict at the left switch.?
.......Charles

Re: Auto reverse area “dead”

#13117

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Charles

You cannot do a reversing section with only one rail isolated.? You MUST isolate both rails at all entry/exit points of the portion to be auto-reversed.? If you've done that, and I misunderstand your report below, I apologize, but dual isolation is an absolute.

Have you done the PSX-AR test, as asked yesterday?

On 2021-10-12 7:41, Charles Cauble wrote:

Show quoted text

I have the ar #2 section working now from the curve down through the straight side of the turnout on around the outside edge of the peninsula and up through the other switch. ?The inner loop in the peninsula stalls right at the switch as it comes back into the outer loop on that same switch. If I use a metal joiner on the outside leg it shorts that block because the polarities collide but if I use a plastic joiner the engine stalls. I have a frog juicer on the switch so I don’t think it’s the frog but what’s going to switch polarities as it comes back into the turnout?

Re: Auto reverse area “dead”

#13116

Charles,

Both rails need to be isolated at both ends, so that starting from the switch into the loop you see:

- track leading off it, left AND right isolated

- continuous track until, before getting to the switch again, you reach\

- another point where both rails are isolated, and only then do you reach

- the switch again, at its other leg.

What you have is, however you configured it (and I don't know) not correctly isolated with regard to the tgrack, or not correctly wired as far as the AR unit is concerned. The track bus goes into the AR unit (polarity does not matter), its outputs (and NOTHING else) go to the left and right doubly-isolated rail between the two legs of the switch (again, polarity does not matter). Then the AR will correct when a train crosses either one of the divides. If a train is too long and crosses both divides, you have a short again. Same thing if you have two different trains crossing the two different divides at the same time. That's just the way it is. Careful positioning of the isolation is needed so you get maximum ease of use out of the final situation.

Wouter

Show quoted text

On Tue, 12 Oct 2021 at 12:41, Charles Cauble <drbeetlebaum@...> wrote:

I have the ar #2 section working now from the curve down through the straight side of the turnout on around the outside edge of the peninsula and up through the other switch.? The inner loop in the peninsula stalls right at the switch as it comes back into the outer loop on that same switch. If I use a metal joiner on the outside leg it shorts that block because the polarities collide but if I use a plastic joiner the engine stalls. I have a frog juicer on the switch so I don’t think it’s the frog but what’s going to switch polarities as it comes back into the turnout?

Re: Auto reverse area “dead”

#13115

I have the ar #2 section working now from the curve down through the straight side of the turnout on around the outside edge of the peninsula and up through the other switch. ?The inner loop in the peninsula stalls right at the switch as it comes back into the outer loop on that same switch. If I use a metal joiner on the outside leg it shorts that block because the polarities collide but if I use a plastic joiner the engine stalls. I have a frog juicer on the switch so I don’t think it’s the frog but what’s going to switch polarities as it comes back into the turnout?

Re: Auto reverse area “dead”

#13114

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And yes, those would be the only two wires to the section.

On 10/11/2021 10:54 AM, Charles Cauble wrote:

Show quoted text

I put a jumper J6-1 to J6-2 since I use NCE. ?THen I wired it and cut all drops from bus in that section. The lights weren’t on so I traced down a bad connection on the input side and it lit the 2 leds. I’m beginning to think my output wies may not have good connection. ?Just to be sure sure, those 2 wires from psx ar are the only power to that section, correct?

Re: Auto reverse area “dead”

#13113

开云体育

I don't have one here, but that's the way I read the instructions on their website.? Have you executed the test on page 3 of the manual?

On 10/11/2021 10:54 AM, Charles Cauble wrote:

Show quoted text

I put a jumper J6-1 to J6-2 since I use NCE. ?THen I wired it and cut all drops from bus in that section. The lights weren’t on so I traced down a bad connection on the input side and it lit the 2 leds. I’m beginning to think my output wies may not have good connection. ?Just to be sure sure, those 2 wires from psx ar are the only power to that section, correct?

Re: Auto reverse area “dead”

#13112

I put a jumper J6-1 to J6-2 since I use NCE. ?THen I wired it and cut all drops from bus in that section. The lights weren’t on so I traced down a bad connection on the input side and it lit the 2 leds. I’m beginning to think my output wies may not have good connection. ?Just to be sure sure, those 2 wires from psx ar are the only power to that section, correct?