Author Topic: Husqvarna 562xp autotune  (Read 12361 times)

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Offline EHP

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Re: 562 Xp auto tune
« Reply #140 on: August 23, 2014, 07:04:14 pm »
red oak is just used to make lumber, its not good red oak which goes for sciler . I cut 12 more that size today plus 26 white ash like the ones in the picture so a good day , cut skid and cut up and pile , good long day

Offline KilliansRedLeo

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Re: 562 Xp auto tune
« Reply #141 on: August 27, 2014, 07:52:30 am »
Tim, did a little reading on the system and from what I understand,  the processor does indeed make continues adjustments during operation AFTER the initial and complete run in has be performed. That run in is crucial to setting baseline tuning, after that the sensors and processor make small tuning changes.  If the prescribed run in isn't done properly, which calls for WOT in wood for X amount of time, the saw stays in the default mode. Seems to me that this may be the issue with the saws that folks are complaining about low power?

Adam, I agree, the saw does make continuous adjustments based on the baseline model however the processor probably does not have the power to adjust the saw during the current run and adjust the baseline calculations at the same time. Probably why it is so important to get the initial baseline done properly, because everything after that is just a run time adjustment to the initial baseline.
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Offline aclarke

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Re: 562 Xp auto tune
« Reply #142 on: August 27, 2014, 09:44:19 am »
Tim,
That makes sense, makes small adjustments base on the initial run in which sets the saw up for altitude/temp, etc.   

Anyone take one of these saws from sea level to high altitude? I'm curious if the processor has enough "authority" to make a 1/8-1/4 "turn" adjustment or does the saw run like crap for 4-5 tanks til things get slowly changed?

Offline Cut4fun

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Re: 562 Xp auto tune
« Reply #143 on: August 27, 2014, 09:51:45 am »

Anyone take one of these saws from sea level to high altitude? I'm curious if the processor has enough "authority" to make a 1/8-1/4 "turn" adjustment or does the saw run like crap for 4-5 tanks til things get slowly changed?

I had always wondered about that one myself.

Offline adam32

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Re: 562 Xp auto tune
« Reply #144 on: August 27, 2014, 10:11:01 am »
Tim,
That makes sense, makes small adjustments base on the initial run in which sets the saw up for altitude/temp, etc.   

Anyone take one of these saws from sea level to high altitude? I'm curious if the processor has enough "authority" to make a 1/8-1/4 "turn" adjustment or does the saw run like crap for 4-5 tanks til things get slowly changed?

My local dealer said that you need to run it wide open for 5 minutes, it'll run like crap for those 5 minutes. Then shut it off and let it sit for 5 more minutes. Fire it back up and it should've readjusted itself...He told me that right after the 562's came out and he had just got back from Husky school.

Offline KilliansRedLeo

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Re: 562 Xp auto tune
« Reply #145 on: August 27, 2014, 11:33:15 am »
IDK Adam, HVA says that the e-proms' programming is supposed to have a fail-safe mechanism which sets the saw back to full-rich if for some reason there is some sort of out-of-bounds condition or system failure.

I am inclined to believe that if you did take the saw from sea-level to 6K feet above, that as soon as you started the saw the programming would realize that the baseline was WAY off of current conditions and knowing that it could not correct it (out-of-bounds), forces the saw into fail-safe mode resulting in the need to run it WFO for 5 minutes to set up a new baseline for the current environment.

I wonder if it does the same sort of thing if you did the baseline @0°F and did not run the saw again until it was 80°F?
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Offline aclarke

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Re: 562 Xp auto tune
« Reply #146 on: August 27, 2014, 11:48:02 am »
Just asked a friend who runs his 562 at sea level and cuts in National Forest at 5-6000 feet occasionally for firewood.  He said it takes a couple of tanks for the saw to lean itself out...

Offline KilliansRedLeo

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Re: 562 Xp auto tune
« Reply #147 on: August 27, 2014, 02:52:58 pm »
Hmmmmmmmm, I wonder then if the prom does store some data over time and SLOWLY reshapes the baseline operational parameters. ???
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
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Offline aclarke

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Re: 562 Xp auto tune
« Reply #148 on: August 27, 2014, 03:40:37 pm »
Tim, I'd really like to know more about the system.  You know anyone in the know at Husqvarna?

Offline KilliansRedLeo

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Re: 562 Xp auto tune
« Reply #149 on: August 27, 2014, 08:47:29 pm »
Only a black female engineer I met years ago at the factory named Helica, I will send her a note to ask for design criteria info. Can't promise anything, as this sort of stuff is HVA intellectual property.
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

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