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Matching LokSound and LokPilot acceleration, deceleration

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Matching LokSound and LokPilot acceleration, deceleration
Posted by John-NYBW on Friday, January 7, 2022 12:21 PM

Several years ago I purchased a pair of P1K C-Liners, #5008 and 5013. I've always intended to run them as a paired AA set so I only put a sound decoder in loco 5008, a LokSound 5. In 5013 I put a basic Digitrax decoder and set CV29 for it to run in reverse. I had trouble speed matching them, especially when starting up. I experimented with CV3 values in both locos but finally gave up. Instead, I purchased a LokPilot decoder for 5013. This morning I installed it and set CV3 to a value of 6 in both decoders and CV4 to 3 in both. The manuals for both are online and they say exactly the same thing for CVs 3 and 4.

3 Acceleration This value multiplied by 0.25 is the time from stop to maximum speed. For LokSound 5 DCC: The unit is 0.896 seconds. 0 - 255 28

4 Deceleration This value multiplied by 0.25 is the time from maximum speed to stopFor LokSound 5 DCC: The unit is 0.896 seconds. 0 - 255 21

Unfortunately, 5008 is still starting up much more slowly than 5013. The only CVs I've altered from their factory setting are 3, 4, and 29. Are there other CVs that will affect the initial acceleration rate that I should be looking at? I've read through the table of CVs and there are a lot of terms that are foreign to me so I can't figure out if there are other CVs I need to adjust. Here is the full LokSound manual, all 116 pages. The CV table starts on page 102. 

51989_LokSound_5_ESUKG_EN_InstructionManual_Edition-13_eBook_01.pdf

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Posted by tstage on Friday, January 7, 2022 1:13 PM

John,

What you need to adjust first is CV2 (Vmin), CV5 (Vmax), and CV6 (Vmid).  (Make sure you set CVs 3 & 4 to "0" before doing that.)  Once you've adjusted those CVs and the two locomotives run well together at all speed THEN add momentum.  It may be that you will have to set the momentum higher for the Lokpilot than the LokSound to match start delays.

Tom

https://tstage9.wixsite.com/nyc-modeling

Time...It marches on...without ever turning around to see if anyone is even keeping in step.

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Posted by John-NYBW on Friday, January 7, 2022 1:50 PM

That seems simple enough. What is the reason I would need a higher CV3 setting for the LokPilot than for the LokSound?

UPDATE: I did as you suggested. What I've discovered is that no matter what the momentum settings are on the two locos, the LokPilot loco starts moving about 3 seconds before the LokSound loco moves. If I give the LokPilot loco a higher starting momentum value, it still starts moving before the LokSound loco, but then the LokSound loco will accelerate faster. If I seperate them by about a foot and turn the throttle up, the LokPilot loco closes the gap but then the the LokSound loco starts moving and because it ha a lower CV3 value, it accelerates fast and begins to widen the gap. Eventually they reach the same top speed but it doesn't seem I can sync them up at start up. When they are stopping, they both seem to stop together.

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Posted by gmpullman on Friday, January 7, 2022 1:58 PM

I've done this on a few of my Lokpilot V4 decoders to match Loksound decoders in the other units of a "consist".

What I did was assign "Virtual Sound" to F8 in the Lokpilot decoder. I use the Lokprogrammer so I don't have the exact CVs in front of me. You can adjust the delay time to match the sound engine.

This then provides the adjustable delay while the prime mover revs up which is the typical feature of Loksound decoders.

It also eliminated the delay when you "mute" the sound using F8 so both engines then start moving almost immediately.

Alternately, you could eliminate the delay on the Loksound locomotive which would then mimic the Lokpilot. This setting is in the "Driving Characteristics" pane.

I could look later tonight to see what exact CVs need to be changed but don't have the time at the moment.

More here:

https://cs.trains.com/mrr/f/744/p/255377/2855139.aspx

 and here:

https://www.rmweb.co.uk/community/index.php?/topic/81434-enabling-virtual-sound-on-a-lokpilot-non-soundchip/

 

Good Luck, Ed

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Posted by tstage on Friday, January 7, 2022 2:32 PM

John-NYBW
What is the reason I would need a higher CV3 setting for the LokPilot than for the LokSound?

To compensate for the start delay in the LokSound decoder.  It may make sense (and be simpler) to remove the delay from the LokSound decoder, as Ed mentioned.

Tom

https://tstage9.wixsite.com/nyc-modeling

Time...It marches on...without ever turning around to see if anyone is even keeping in step.

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Posted by John-NYBW on Friday, January 7, 2022 2:52 PM

OK, that sounds good. I don't have LokProgrammer so I will have to go through the CV table and figure out which CV to adjust. 

Some of these features on the higher end decoders to me are an unnecessary PITA. Yes, it adds realism but at the cost of complexity. I prefer very low momentum settings because I like to use the throttle to make gradual starts and stops. When stopping, I want to know the loco is going to stop when the throttle step hits zero. I don't want it coasting past where I want the loco to stop.

Ed, I just received the Walthers passenger trucks you sent. I will put them to use shortly. Thank you. 

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Posted by wrench567 on Friday, January 7, 2022 3:21 PM

John-NYBW

OK, that sounds good. I don't have LokProgrammer so I will have to go through the CV table and figure out which CV to adjust. 

Some of these features on the higher end decoders to me are an unnecessary PITA. Yes, it adds realism but at the cost of complexity. I prefer very low momentum settings because I like to use the throttle to make gradual starts and stops. When stopping, I want to know the loco is going to stop when the throttle step hits zero. I don't want it coasting past where I want the loco to stop.

Ed, I just received the Walthers passenger trucks you sent. I will put them to use shortly. Thank you. 

 

 

  Sometimes I feel that DCC is a hobby within a hobby. One could spend hours or days just messing with decoders.

  The delayed start of the sound decoders can really mess a guy up. The Locpilot mimic is a great thing that other manufacturers could adopt.

     Pete.

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Posted by John-NYBW on Friday, January 7, 2022 4:42 PM

wrench567

 

 
John-NYBW

OK, that sounds good. I don't have LokProgrammer so I will have to go through the CV table and figure out which CV to adjust. 

Some of these features on the higher end decoders to me are an unnecessary PITA. Yes, it adds realism but at the cost of complexity. I prefer very low momentum settings because I like to use the throttle to make gradual starts and stops. When stopping, I want to know the loco is going to stop when the throttle step hits zero. I don't want it coasting past where I want the loco to stop.

Ed, I just received the Walthers passenger trucks you sent. I will put them to use shortly. Thank you. 

 

 

 

 

  Sometimes I feel that DCC is a hobby within a hobby. One could spend hours or days just messing with decoders.

  The delayed start of the sound decoders can really mess a guy up. The Locpilot mimic is a great thing that other manufacturers could adopt.

     Pete.

 

I would be perfectly happy if decoders had five functions.

1. Go. 

2. Stop

3. Bell

4. Whistle or horn.

5. Chuffing for steamers. Humming for diesels.

Oops! Forgot the light. Make that six functions. 

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Posted by gmpullman on Friday, January 7, 2022 7:52 PM

John-NYBW
Ed, I just received the Walthers passenger trucks you sent. I will put them to use shortly. Thank you. 

Glad to hear it, John. Hope they help Yes

Regards, Ed

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Posted by John-NYBW on Friday, January 7, 2022 9:33 PM

gmpullman

 

 
John-NYBW
Ed, I just received the Walthers passenger trucks you sent. I will put them to use shortly. Thank you. 

 

Glad to hear it, John. Hope they help Yes

Regards, Ed

 

One Budd car upgraded. I'm running it through some test trials now and it seems to be doing OK. I swapped trucks with one of my worst performing cars and so far no derailments. I don't know what the problem is with the old trucks because just eyeballing them, I see no difference between the trucks I removed and the ones I replaced them with other than the original trucks were painted silver and these are black. There is a huge difference in how they perform. I think these replacements are more free rolling than the ones I removed. Maybe that's the answer. 

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Posted by tstage on Friday, January 7, 2022 10:14 PM

John-NYBW
There is a huge difference in how they perform. I think these replacements are more free rolling than the ones I removed. Maybe that's the answer.

John,

Do you own a truck tuner?  It's a wise investiment for freeing up any sluggish wheel sets that don't spin freely in their plastic trucks.  You can purchase one from Micro-Mark.  Worth every penny in my book...

Tom

https://tstage9.wixsite.com/nyc-modeling

Time...It marches on...without ever turning around to see if anyone is even keeping in step.

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Posted by John-NYBW on Saturday, January 8, 2022 6:40 AM

tstage

 

 
John-NYBW
There is a huge difference in how they perform. I think these replacements are more free rolling than the ones I removed. Maybe that's the answer.

 

John,

Do you own a truck tuner?  It's a wise investiment for freeing up any sluggish wheel sets that don't spin freely in their plastic trucks.  You can purchase one from Micro-Mark.  Worth every penny in my book...

Tom

 

I have a truck tuner but the Walthers trucks have metal frames so the truck tuner isn't much good.

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Posted by John-NYBW on Saturday, January 8, 2022 11:00 AM

gmpullman

I checked out these two links. The first is a thread from 2016 and I'm guessing they are discussing a Lokpilot/Loksound 4 or earlier. They seem to have settled on CV128 as the one to control the start up delay. It appears ESU reconfigured the CV table for Loksound 5 because CV128 is for analog maximum speed. I checked the factory settings and both were set to zero.

The second link is about using LokProgrammer without being specific as to what CV it is adjusting. It's also about LokSound 4. 

I was having trouble finding the correct CV in the online CV table but then I got the idea of doing a word search for delay and that eventually brought me to the third bit of CV124 as the control for the start up delay. While it is the third bit, it is bit number 2 since the bits are numbered 0-7. This took me back to my mainframe programming days and the convention of using displacements to address bits and bytes. I needed to turn off bit 2 which my understanding of binary arithmetic told me to subtract 4 to zero out the third bit (bit 2). Before doing anything I checked the factory setting of CV124 on both locos.  According to the online manual, the factory setting for CV124 is 21 but when I put the locos on the programming track, both locos displayed a value of 4 for CV124 which means the start up delay bit is the only one being used. For whatever reason, the Lokpilot loco was ignoring the start up delay. I decided the best thing to do was zero both of them out to disable the start up delay. That worked. Both locos started at the same time. I still have a start up delay but it is dictated by CV3 which I set at 15 for both locos. This seems to give me a reasonable delay. It doesn't sync with the prime mover sound, but I can barely hear that anyway so it's no big deal. 

Thanks for your help in unraveling this mystery. 

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Posted by woodone on Sunday, January 9, 2022 1:07 PM

I used a LokSound & LokPilot together once a long time ago.

I was never able to adjust or change the delay time in the Pilot decoder.

all I was able to change was the LokSound. After fighting this for some time I just stopped using the start delay.

mybe I missed some thing but never bothered to go back to see.

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Posted by John-NYBW on Sunday, January 9, 2022 1:31 PM

woodone

I used a LokSound & LokPilot together once a long time ago.

I was never able to adjust or change the delay time in the Pilot decoder.

all I was able to change was the LokSound. After fighting this for some time I just stopped using the start delay.

mybe I missed some thing but never bothered to go back to see.

 

That seems to be the consensus. I don't know if it is a bug in the LokPilot software but it doesn't seem to respond the the start up delay CV the way LokSound does. To me it's not an important feature at all. Now that I understand the problem, disabling it on the LokSound decoder isn't something that bothers me at all. Sometimes I think the manufacturers are going overboard with all these features they are putting into their decoders. Was there really a great demand to have the engine startup in sync with the prime mover sound? I seriously doubt it. 

UPDATE: I was just going through the posts in this thread and I realized why LokPilot wouldn't have the start up delay. The whole purpose of that delay is to sync the movement of the engine with the start up sound. The LokPilot has no sound so there would be no reason to program this into the decoder. DUH! I guess they didn't consider the possibility of a LokPilot and LokSound being used in the same consist. It makes me wonder why they bothered making 4 the default value of CV124 in the LokPilot if it is just going to be ignored. 

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Posted by woodone on Sunday, January 9, 2022 2:36 PM

The LokPilot has the start delay, at least that's my understanding.

The idea was so you could use the LokSound decoder with the Pilot.

To start-you hit F-8 this started the sound in the LokSound and also made the Pilot go to the start delay- that way the two decoders would have a start delay. If you did not do this one decoder would push/pull the other . When I did this trying to get both decoders to start/stop together was a BIG problem for me and I just quit trying after hours of chasing CV's

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Posted by tstage on Sunday, January 9, 2022 4:03 PM

John-NYBW
UPDATE: I was just going through the posts in this thread and I realized why LokPilot wouldn't have the start up delay. The whole purpose of that delay is to sync the movement of the engine with the start up sound. The LokPilot has no sound so there would be no reason to program this into the decoder. DUH! I guess they didn't consider the possibility of a LokPilot and LokSound being used in the same consist. It makes me wonder why they bothered making 4 the default value of CV124 in the LokPilot if it is just going to be ignored.

John,

Re-read Ed (gmpullman)'s earlier post.  He used the "virtual sound" feature in the Lokpilot to mimic the delay in that locomotive using F8.

Tom

https://tstage9.wixsite.com/nyc-modeling

Time...It marches on...without ever turning around to see if anyone is even keeping in step.

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Posted by John-NYBW on Sunday, January 9, 2022 7:17 PM

Seems like a lot of complexity for no benefit. I get a start delay simply by putting a value of 15 in CV3 in both locos and zeroing out CV124. Both locos start at the same time and accelerate at the same rate. That's all I wanted. I can increase or decrease the delay by changing the value in CV3. No need to mess with F8. 

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Posted by John-NYBW on Monday, January 10, 2022 5:12 PM

Lastspikemike

 

 
woodone

The LokPilot has the start delay, at least that's my understanding.

The idea was so you could use the LokSound decoder with the Pilot.

To start-you hit F-8 this started the sound in the LokSound and also made the Pilot go to the start delay- that way the two decoders would have a start delay. If you did not do this one decoder would push/pull the other . When I did this trying to get both decoders to start/stop together was a BIG problem for me and I just quit trying after hours of chasing CV's

 

 

 

Lokpilot is not programmed with start delay out of the box. At least mine were not.

The Lokpilot manual makes no mention of this feature as far as I can tell.

However, it seems likely that CV124 could be set to the same value in a Lokpilot and then there would be the same start delay as for factory programmed Loksound decoders  so that you can easily consist the two types.

The effect is voltage related. The Loksound requires a higher start voltage before moving off than it would with CV124 set to zero or 16, I.e. startup delay disabled.

 

I did a factory reset for both the LokSound and LokPilot decoders before making any adjustments to CVs 3, 4, and 124. I then displayed the value for CV124 and in both the value is 4 which enables the bit in CV124 that dictates start delay. After doing this, the LokSound loco did a delayed start but the LokPilot loco did not. It started moving as soon as the throttle was turned up. This makes sense because the purpose of the start delay was to sync the movement of the loco to the sound of the prime mover. Since the LokPilot is a non-sound decoder, there is no reason for it to have been programmed to respond to the start up delay bit of CV124. IOW, it ignores that CV no matter what the setting was. Since I wanted both locos to move together and the LokPilot would not delay its start, the only other option was to disable start delay in the LokSound decoder. After doing so, both locos moved in sync. I was able to achieve a delayed start simply by increasing the value of CV3 in both locos. I settled on a value of 15 and that gives me a realistic delay.

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Posted by John-NYBW on Tuesday, January 11, 2022 9:52 AM

Lastspikemike

 

 
John-NYBW

 

 
Lastspikemike

 

 
woodone

The LokPilot has the start delay, at least that's my understanding.

The idea was so you could use the LokSound decoder with the Pilot.

To start-you hit F-8 this started the sound in the LokSound and also made the Pilot go to the start delay- that way the two decoders would have a start delay. If you did not do this one decoder would push/pull the other . When I did this trying to get both decoders to start/stop together was a BIG problem for me and I just quit trying after hours of chasing CV's

 

 

 

Lokpilot is not programmed with start delay out of the box. At least mine were not.

The Lokpilot manual makes no mention of this feature as far as I can tell.

However, it seems likely that CV124 could be set to the same value in a Lokpilot and then there would be the same start delay as for factory programmed Loksound decoders  so that you can easily consist the two types.

The effect is voltage related. The Loksound requires a higher start voltage before moving off than it would with CV124 set to zero or 16, I.e. startup delay disabled.

 

 

 

I did a factory reset for both the LokSound and LokPilot decoders before making any adjustments to CVs 3, 4, and 124. I then displayed the value for CV124 and in both the value is 4 which enables the bit in CV124 that dictates start delay. After doing this, the LokSound loco did a delayed start but the LokPilot loco did not. It started moving as soon as the throttle was turned up. This makes sense because the purpose of the start delay was to sync the movement of the loco to the sound of the prime mover. Since the LokPilot is a non-sound decoder, there is no reason for it to have been programmed to respond to the start up delay bit of CV124. IOW, it ignores that CV no matter what the setting was. Since I wanted both locos to move together and the LokPilot would not delay its start, the only other option was to disable start delay in the LokSound decoder. After doing so, both locos moved in sync. I was able to achieve a delayed start simply by increasing the value of CV3 in both locos. I settled on a value of 15 and that gives me a realistic delay.

 

 

 

According to the Lokpilot manual page 62 it is  CV 252 that is used to control the start delay for consisting with other decoder equipped locomotives.

 

I didn't do consisting in the traditional sense. When I have two locos that are always going to be paired together, I simply assign them the same address. Mostly I have done this with matching A & B units. This was the first time I have permanently paired two A units. Both were assigned address 5008 which is the loco with the LokSound decoder and which will normally be in the lead. I reversed the direction of 5013 by adjusting the first bit of CV29. I assigned a value of 50 for CV29 in loco 5008 and 51 in loco 5013. That way I can run them back-to-back instead of elephant style.

I now have what I wanted, paired locos that are speed matched whether accelerating, running, or decelerating. If I ever want to run them separately, I'll have to readdress 5013 but I don't anticipate doing that. 

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