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https://youtu.be/znnJrlpku-U
On Thu, Aug 12, 2021 at 4:57 PM Jeff Scarbrough <fishplate@gmail.com> wrote:
> I've been thinking about this and looking at the struts on our Subaru.
> Some important things: you can move it independently of the motor
> operation, but it will try to move by motor if you do that; it can be set
> to a "preferred" height based on key used or seat settings, and.only one
> strut has a wire.
>
> I'm guessing it's an actuator that uses some sort of drive wheel on the
> rod, and a stepper motor of some sort to drive it.
>
> Possibly it has lost its zero point? It might be educational to
> disconnect the hatch end and operate it unloaded. See if it stutters then,
> and verify the hinges themselves don't have a problem.
>
> On Thu, Aug 12, 2021, 16:35 <jblair1948@cox.net> wrote:
>
>> Hi Gang,
>>
>> Got a different question this time, not compressors. My neighbor has a
>> 2018 Ford Escape with the power lift hatch. A couple of weeks ago she went
>> someplace and had the load something in the back of her car. She told them,
>> "Don't close the hatch, I will close it from in here!" Well guess what,
>> they tried to close the hatch. After that her hatch has had all kind of
>> problems, not opening correctly/completely, not closing correctly, etc. She
>> tried to pull the fuse to "reset" the controller for the power hatch.
>>
>> I'm spent a lot of time doing internet searches for "how do they work",
>> "troubleshooting power lift hatches", etc. to no avail.
>>
>> I'm wondering if anyone know what type technology they use for all these
>> power lift hatches?
>>
>> I only way I can think of them working is with a linear actuactor. And I
>> did find an excellent video on linear actuactors and controlling them. But
>> a linear actuactor is basically a long screw and a nut. As the screw turns
>> the nut moves either up or down.
>>
>> If they are using a linear actuactor that can't be manually over riden.
>> And I'd assume that it would bend
>> either the hinges on the hatch or the actual hatch itself. And I can't
>> believe that a manufacturer would build something like that into a car.
>> Every one is used to pulling down on a hatch or a trunk. So it seems to me
>> that having someone helping you load your car with anything is likely to
>> try and manually close your hatch/trunk.
>>
>> So anyone know if these things are really linear actuactors or what they
>> are? Untill my neighbor desides to replace hers, I don't have one to cut
>> open and look inside. :)
>>
>> TIA,
>>
>> John
>> _______________________________________________
>>
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>> _______________________________________________
>
> Shop-talk@autox.team.net
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--
Eric Russell
Mebane, NC
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Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div dir=3D"ltr"><a href=3D"https://youtu.be/znnJrlpku-U";>=
https://youtu.be/znnJrlpku-U</a>=C2=A0<br></div><div dir=3D"ltr"><br></div>=
</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">=
On Thu, Aug 12, 2021 at 4:57 PM Jeff Scarbrough <<a href=3D"mailto:fishp=
late@gmail.com">fishplate@gmail.com</a>> wrote:<br></div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;=
border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex=
"><div dir=3D"auto">I've been thinking about this and looking at the st=
ruts on our Subaru.=C2=A0 Some important things:=C2=A0 you can move it inde=
pendently of the motor operation, but it will try to move by motor if you d=
o that; it can be set to a "preferred" height based on key used o=
r seat settings, and.only one strut has a wire.<div dir=3D"auto"><br></div>=
<div dir=3D"auto">I'm guessing it's an actuator that uses some sort=
of drive wheel on the rod, and a stepper motor of some sort to drive it.</=
div><div dir=3D"auto"><br></div><div dir=3D"auto">Possibly it has lost its =
zero point?=C2=A0 It might be educational to disconnect the hatch end and o=
perate it unloaded.=C2=A0 See if it stutters then, and verify the hinges th=
emselves don't have a problem.</div></div><br><div class=3D"gmail_quote=
"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Aug 12, 2021, 16:35 <<a=
href=3D"mailto:jblair1948@cox.net"; target=3D"_blank">jblair1948@cox.net</a=
>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px=
0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);bor=
der-left-style:solid;padding-left:1ex"><u></u>
=20
=20
=20
<div>
<p>Hi Gang,</p>
<p>Got a different question this time, not compressors. My neighbor has a=
2018 Ford Escape with the power lift hatch. A couple of weeks ago she went=
someplace and had the load something in the back of her car. She told them=
, "Don't close the hatch, I will close it from in here!" Well=
guess what, they tried to close the hatch. After that her hatch has had al=
l kind of problems, not opening correctly/completely, not closing correctly=
, etc. She tried to pull the fuse to "reset" the controller for t=
he power hatch.</p>
<p>I'm spent a lot of time doing internet searches for "how do t=
hey work", "troubleshooting power lift hatches", etc. to no =
avail.</p>
<p>I'm wondering if anyone know what type technology they use for all=
these power lift hatches?</p>
<p>I only way I can think of them working is with a linear actuactor. And=
I did find an excellent video on linear actuactors and controlling them. B=
ut a linear actuactor is basically a long screw and a nut. As the screw tur=
ns the nut moves either up or down.</p>
<p>If they are using a linear actuactor that can't be manually over r=
iden. And I'd assume that it would bend<br>either the hinges on the hat=
ch or the actual hatch itself. And I can't believe that a manufacturer =
would build something like that into a car. Every one is used to pulling do=
wn on a hatch or a trunk. So it seems to me that having someone helping you=
load your car with anything is likely to try and manually close your hatch=
/trunk.</p>
<p>So anyone know if these things are really linear actuactors or what th=
ey are? Untill my neighbor desides to replace hers, I don't have one to=
cut open and look inside. :)</p>
<p>TIA,</p>
<p>John</p>
</div>
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</blockquote></div>
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</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
class=3D"gmail_signature"><div dir=3D"ltr">Eric Russell<div>Mebane, NC</di=
v></div></div>
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