Home » Public Forums » GMCnet » Environmental controls - again
| Environmental controls - again [message #113195] |
Wed, 26 January 2011 15:17  |
thorndike
Messages: 406
Registered: January 2011
Location: Conifer, Colorado
Karma: 0
|
Senior Member |
|
|
I didn't get a clear answer the first time I posted this, so I thought I would try again.
I have been looking at dash restorations and noticed that it appears the no one replaces the A/C - Heat control panel. It seems strange to me to have so much of the dash upgraded, but still leave the old and unattractive control.
Is there no replacement available for that or are we stuck with the old control for the rest of our lives?
Bob
Robert Peesel
1976 Royale 26'
Side Dry Bath
Conifer, Colorado
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113204 is a reply to message #113195] |
Wed, 26 January 2011 17:15  |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
Bob,
Joe Ekl made a presentation at DuQuoin about his mod to use the panel and
electrically controlled servos out of a Chevy pickup truck (I think) to
replace the OEM GMC panel and vacuum servos.
jfekl66@verizon.net
BTW it is NOT a simple mod!
Regards,
Rob M.
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Robert Peesel
Sent: Thursday, January 27, 2011 8:18 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Environmental controls - again
I didn't get a clear answer the first time I posted this, so I thought I
would try again.
I have been looking at dash restorations and noticed that it appears the no
one replaces the A/C - Heat control panel. It seems strange to me to have so
much of the dash upgraded, but still leave the old and unattractive control.
Is there no replacement available for that or are we stuck with the old
control for the rest of our lives?
Bob
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
|
|
|
|
| Re: Environmental controls - again [message #113215 is a reply to message #113195] |
Wed, 26 January 2011 19:34 |
Larry C
Messages: 1168
Registered: July 2004
Location: NE Illinois by the Illino...
Karma: 0
|
Senior Member |
|
|
My understanding is this control for heat/cooling and vent controls is no longer in production and if you have the luck hunting parts as I have for my 1986 Chev Pickup, you will be searching in the Antique sellers. I have not had much good luck for my parts, by the way.
If you want to move your vent doors with solenoids, AllElectronicsCorp still sells some 12vdc motor type operators that were intended for use on door locks but would work for moving air doors..... just a thought.
The hot/cold mix door/selector is operated by a slide which moves a wire in a wire sprial to the HDAC box. I don't see why that could not be operated by one of those operators...
tearing out the Dash and rebuilding it is more than I can attempt, much success to you...
Gatsbys' CRUISER  08-18-04
74 GLACIER X, 260/455-APC-4 Bagg'r
Remflex Manifold gaskets
CampGrounds needed, Add yours to "PLACES" />
http://www.gmceast.com/travel
_
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113216 is a reply to message #113195] |
Wed, 26 January 2011 19:43 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Bob,
The problem with installing a new (different design) control arises from the
complexity of the GMC's duct work. If you'll review my reply to Gary
Worobec on 24 Jan, including the photo link provided, and refer to page
1-104 of the X7524 GMC manual, you'll have a better understanding of what
I'm about to say.
In the vacuum routing diagram on page 104, you'll see that there a 6
individual vacuum operators controlling the complex duct work shown in my
photograph. Those operators are all controlled by the top lever on the
control panel, though one little 1" diameter "programming" disc. All of the
rest of the control is common to many GM vehicles, but when using them, the
GMC-unique disc must be used.
From my description of the duct work and air flow, it should be obvious that
some parts of the system serve as both hot air and cool air passageways.
Which of those functions is in effect when is determined by that little
disc. Finding a different vacuum control unit which can match those modes
will be difficult, if not impossible.
A possibly viable alternative would be to replace the vacuum operators with
electrical ones. Designing an electrical control for such operators would
be, not trivial, but much simpler than creating a new vacuum control. A
later production control could probably be used.
BUT, a BIG problem is that if one removes the 32+ year old plastic dash/duct
to change the operators, they'll inevitably wind up with several pieces --
guaranteed. With care, all but one of the pieces will be trivially small
bits broken off. But that big piece will still be a fragile assembly of
over-aged plastic. Grafting new control motors (which have yet to be
identified) to that assembly will not be simple. And once done, the VERY
serious shortcomings of the ductwork will remain. You'll learn on the first
warm day that those shortcomings far override the visual appeal of the
control head.
So, the short answer to your question is, "Yes, we're stuck for life with
the old control." Unless, that is, you're willing to undertake, as I and
several others have, complete replacement of the dash. Even then, you'll
face the dilemma I have: Finding appropriate electrical operators and
designing a suitable control panel. I'm still using that "ugly" original
control and "thinking" about alternatives even though I've replaced the
entire dash.
Sorry I don't have better news.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Wed, Jan 26, 2011 at 4:17 PM, Robert Peesel <thorndike@pldsllc.com>wrote:
>
>
> I didn't get a clear answer the first time I posted this, so I thought I
> would try again.
>
> I have been looking at dash restorations and noticed that it appears the no
> one replaces the A/C - Heat control panel. It seems strange to me to have so
> much of the dash upgraded, but still leave the old and unattractive control.
>
> Is there no replacement available for that or are we stuck with the old
> control for the rest of our lives?
>
> Bob
>
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113221 is a reply to message #113215] |
Wed, 26 January 2011 20:15 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Larry,
A big problem with using door lock actuators to move the existing HVAC
doors, quite aside from getting to them for the replacement, is that the
doors are spring loaded in one direction. The door lock actuators, while
reversible, do not resist movement when unpowered, but are not designed for
continuous operation.
And for moving the temperature control door, they're not suitable because
they're designed for "bang--bang" operation -- don't like intermediate
positions, operate too fast for easy modulation, and won't hold a setting.
But that function is probably easily assumed by an operator from a later
model car and is easy to reach for modification.
From what I've seen on the various aftermarket a/c sites, the Chevy Cavalier
rotary control heads, and related operators, are most popular. During my
last trip to Pull-a-Part, I tried to find one of the control heads but found
all but one of them to be missing the control knobs. I have the 3 knobs from
that one, but didn't have time to pull the control. I'll get that, and a
few of the operators on my next trip. But getting to the operators can be a
major problem -- they MUST be very reliable, 'cause they sure as heck aren't
installed for ease of service!
But they'll be installed (maybe) on my all-new HVAC, NOT on the original.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Wed, Jan 26, 2011 at 8:34 PM, Larry <slawrence111@yahoo.com> wrote:
>
> ...
If you want to move your vent doors with solenoids, AllElectronicsCorp still
> sells some 12vdc motor type operators that were intended for use on door
> locks but would work for moving air doors..... just a thought.
> The hot/cold mix door/selector is operated by a slide which moves a wire in
> a wire sprial to the HDAC box. I don't see why that could not be operated
> by one of those operators...
> ...
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113240 is a reply to message #113221] |
Wed, 26 January 2011 22:34 |
Larry C
Messages: 1168
Registered: July 2004
Location: NE Illinois by the Illino...
Karma: 0
|
Senior Member |
|
|
Yes you are correct Ken
My thought was maybe the doors would be held by the force of air or even magnets at the doors open and close position....
hmmm maybe not.
I realize the hot cold for the HVAC box needs a variable, maybe a small linear unit could work, but probably costly.
Just throwing out there.
I am usually thinking about this since Gatsbys' CRUISER has no vacuum assist for the doors. One of the POs tore that out, I guess he had a vacuum problem and that was how he fixed it, I guess.
For now I am trying to figure how I could run without doors, keeping only the cable for the hot/cold air mix door.
Funny thing about a GMC, you find a plan and complete one project, another project looms in the not too distant future, like magic..... did someone say they call their GMC "THE MONEY PIT" 
Gatsbys' CRUISER 08-18-04
74 GLACIER X, 260/455-APC-4 Bagg'r
Remflex Manifold gaskets
CampGrounds needed, Add yours to "PLACES" />
http://www.gmceast.com/travel
_
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113248 is a reply to message #113216] |
Thu, 27 January 2011 01:29 |
Adrien G.
Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624
Karma: 1
|
Senior Member |
|
|
ken,
Any thought about using model airplane control servos, to control the temp door and whatever else?
Just a quick thought or idea.
Adrien & Jenny Genesoto
75 Glenbrook (26-3) Mods LS3.70 FD / Reaction Sys / 80mm Front&Intermidiate / Hydroboost / 16" Tires / Frame Rebuild / Interior Rebuild
Yuba City,Ca. Text 530-nine-3-three-3-nine-nine-6
|
|
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113269 is a reply to message #113255] |
Thu, 27 January 2011 08:32 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
|
Senior Member |
|
|
Sounds like a great name to me, Mike!
We named a previous boat "Budget Bu$ter"
for its US Coast Guard docomented name.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
----------------------------------------
> To: gmclist@temp.gmcnet.org
> From: m000035@gmail.com
> Date: Thu, 27 Jan 2011 05:58:44 -0600
> Subject: Re: [GMCnet] Environmental controls - again
>
>
>
> Larry C wrote on Wed, 26 January 2011 20:34
> > ...Funny thing about a GMC, you find a plan and complete one project, another project looms in the not too distant future, like magic..... did someone say they call their GMC "THE MONEY PIT" :lol:
>
>
> While I do have many projects waiting on money, many more projects are just waiting for the time to do them.
>
> Maybe I should name one of my coaches "Time Bandit."
> --
> Mike Miller
> '73 26' X Painted D. -- `78 23' Birchaven Rear Bath -- `77 23' Birchaven Side Bath
> Hillsboro, OR
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: Environmental controls - again [message #113272 is a reply to message #113195] |
Thu, 27 January 2011 09:02 |
thorndike
Messages: 406
Registered: January 2011
Location: Conifer, Colorado
Karma: 0
|
Senior Member |
|
|
Thanks for the information folks. I had no idea that the environment control panel was so much more than levers and switches. I didn't realize that there that much circuitry involved.
Bob
Robert Peesel
1976 Royale 26'
Side Dry Bath
Conifer, Colorado
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113283 is a reply to message #113248] |
Thu, 27 January 2011 09:56 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Adrien,
That might be a possibility, but I suspect most would not have enough power,
they're probably a lot more expensive than the purpose-built junkyard parts,
and adapting them to existing auto controls might be difficult. I'm going
to keep looking for the right GM parts -- or waiting for someone else to
identify them. :-)
Joe Ekl has done a lot of work on this, in addition to the duct/door/motor
replacement he presented at Duquoin. He'll probably find something for me.
Ken H.
On Thu, Jan 27, 2011 at 2:29 AM, Adrien Genesoto <fixman54@syix.com> wrote:
>
>
> ken,
> Any thought about using model airplane control servos, to control the temp
> door and whatever else?
>
> Just a quick thought or idea.
> --
> Adrien
> 75 Glenbrook
> Yuba City,Ca.
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: Environmental controls - again [message #113287 is a reply to message #113195] |
Thu, 27 January 2011 10:19 |
g.winger
Messages: 792
Registered: February 2008
Location: Warrenton,Missouri
Karma: 0
|
Senior Member |
|
|
|
Ken,,,,would it be possable to use a simple roatary switch with at least 6 positions (off,max,AC,vent,heat,defrost), a bunch of diffrent resistors to vary a 12-13 volt signal. Use one of those electric motors I sent you. They are stong. Hold position as long as V. is applied and return to center when V. is removed. 90 degree,s total throw. And were used on rear air doors????? If I knew a good old retired EE I'd ask him the same Q. You know,,,some one who has their own O-scope and stuff like that.,,,,PL (just trying to help,,,tore apart the rest of the dash last nite. 1/2 of it fits in a small trash can. very brittle stuff)
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113305 is a reply to message #113287] |
Thu, 27 January 2011 12:28 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Paul,
Your motors are certainly the best option I've yet seen, and using them with
a switch to select the different modes would be trivial, even in the cases
where a mode requires the movement of multiple doors. Basically, we'd
figure out which doors need to be opened for each of the modes, and connect
diodes from those switch positions to the corresponding door motors. The
need to reverse the polarity to reverse the motor complicates that
description slightly, but not seriously.
The problem I see is the temperature control. Sending a variable voltage,
with a potentiometer, or switched resistors, is easy. But my testing didn't
agree with yours: You say you could get them to maintain an intermediate
postition with <12 VDC applied. I could too, but the motor was continually
seeking over a small range of movement and consumed far more current than
when driven to a limit. I'll have to do some more testing to see if I can
achieve your results. Is it possible that the motors we tested are
different -- this one for full travel and the one you tested for
incremental?
I'm expecting the motors from Cavaliers, etc., to be very similar to yours.
Ken H.
On Thu, Jan 27, 2011 at 11:19 AM, Paul Leavitt <leavittpaul@yahoo.com>wrote:
>
>
> Ken,,,,would it be possable to use a simple roatary switch with at least 6
> positions (off,max,AC,vent,heat,defrost), a bunch of diffrent resistors to
> vary a 12-13 volt signal. Use one of those electric motors I sent you. They
> are stong. Hold position as long as V. is applied and return to center when
> V. is removed. 90 degree,s total throw. And were used on rear air doors?????
> If I knew a good old retired EE I'd ask him the same Q. You know,,,some one
> who has their own O-scope and stuff like that.,,,,PL (just trying to
> help,,,tore apart the rest of the dash last nite. 1/2 of it fits in a small
> trash can. very brittle stuff)
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: Environmental controls - again [message #113308 is a reply to message #113195] |
Thu, 27 January 2011 12:53 |
g.winger
Messages: 792
Registered: February 2008
Location: Warrenton,Missouri
Karma: 0
|
Senior Member |
|
|
|
Ken,,,the reason I sent it to you was to get those wheels a turnin!!! Now I was in a "satelite" shop without the fancy power supply. So I hit it with 12v supply and then 12+ to the signal for full sweep one way. -12v for full swwep the other way. When I removed the signal it returned to center. Now this was after looking at the wiring diagram. Thought I sent it???Or did I. Anyway,,,,to get a lesser voltage I used a 9volt battery. I'll experament some more,,,but i saw no hunting. I sent one to Joe Ekl too.,,,,,PL
|
|
|
|
| Re: Environmental controls - again [message #113328 is a reply to message #113195] |
Thu, 27 January 2011 16:46 |
thorndike
Messages: 406
Registered: January 2011
Location: Conifer, Colorado
Karma: 0
|
Senior Member |
|
|
You guys are WAY smarter than I am!
Wouldn't it be great if a replacement could be designed and implemented?
Robert Peesel
1976 Royale 26'
Side Dry Bath
Conifer, Colorado
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113331 is a reply to message #113328] |
Thu, 27 January 2011 17:14 |
|
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
Bob,
As noted on two occasions earlier Joe Ekl has come up with a way to adapt
the controls out of a Chevy pickup truck, he made a presentation on the mod
at the DuQuoin Convention.
He can be contacted at:
jfekl66@verizon.net
Joe,
Could you please provide some info on your mod.
Thanks,
Rob M.
Regards,
Rob M.
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Robert Peesel
Sent: Friday, January 28, 2011 9:47 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Environmental controls - again
You guys are WAY smarter than I am!
Wouldn't it be great if a replacement could be designed and implemented?
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113336 is a reply to message #113331] |
Thu, 27 January 2011 18:11 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
|
Senior Member |
|
|
cool I guess we can read all about it in the technical write-ups for the
rally ?
gene
On Thu, Jan 27, 2011 at 3:14 PM, Rob Mueller <robmueller@iinet.net.au>wrote:
> Bob,
>
> As noted on two occasions earlier Joe Ekl has come up with a way to adapt
> the controls out of a Chevy pickup truck, he made a presentation on the mod
> at the DuQuoin Convention.
>
> He can be contacted at:
>
> jfekl66@verizon.net
>
> Joe,
>
> Could you please provide some info on your mod.
>
> Thanks,
>
> Rob M.
>
> Regards,
> Rob M.
> USAussie - Downunder
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
>
>
> -----Original Message-----
> From: gmclist-bounces@temp.gmcnet.org
> [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Robert Peesel
> Sent: Friday, January 28, 2011 9:47 AM
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Environmental controls - again
>
> You guys are WAY smarter than I am!
>
> Wouldn't it be great if a replacement could be designed and implemented?
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113347 is a reply to message #113283] |
Thu, 27 January 2011 20:34 |
gene1
Messages: 50
Registered: February 2004
Location: Southern California
Karma: 0
|
Member |
|
|
Ken,
RC servos come in many sizes, but a standard servo would drive most AC
doors. Here is a site that describes it all. Many RC guys have tons of old
ones.
http://www.horrorseek.com/home/halloween/wolfstone/Motors/svoint_RCServos.html#Avail
I do have a lot of used RC servos since I mostly fly the small BNF planes
now, whose servos wouldn't open any door.
A control device to adjust each servo is also described. They usually
operate on 4.8 Volts, DC, but 6 Volts make them a little faster and a little
stronger. Go to a RC swap meet, you will generally find a lot of RC servos
for sale. Try RC swap meet in Goggle.
How many servos did you say would need for a GMC?
Gene 76 Eleganza North County San Diego
----- Original Message -----
From: "Ken Henderson" <hend4800@bellsouth.net>
To: <gmclist@temp.gmcnet.org>
Sent: Thursday, January 27, 2011 7:56 AM
Subject: Re: [GMCnet] Environmental controls - again
> Adrien,
>
> That might be a possibility, but I suspect most would not have enough
> power,
> they're probably a lot more expensive than the purpose-built junkyard
> parts,
> and adapting them to existing auto controls might be difficult. I'm going
> to keep looking for the right GM parts -- or waiting for someone else to
> identify them. :-)
>
> Joe Ekl has done a lot of work on this, in addition to the duct/door/motor
> replacement he presented at Duquoin. He'll probably find something for
> me.
>
> Ken H.
>
>
> On Thu, Jan 27, 2011 at 2:29 AM, Adrien Genesoto <fixman54@syix.com>
> wrote:
>
>>
>>
>> ken,
>> Any thought about using model airplane control servos, to control the
>> temp
>> door and whatever else?
>>
>> Just a quick thought or idea.
>> --
>> Adrien
>> 75 Glenbrook
>> Yuba City,Ca.
>> _______________________________________________
>> GMCnet mailing list
>> List Information and Subscription Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
|
|
| Re: [GMCnet] Environmental controls - again [message #113349 is a reply to message #113347] |
Thu, 27 January 2011 21:52 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Gene,
Thanks for that link. Sort of strangely, I suppose, for someone with an
aviation and electronics background, I never had ANY interest in RC, so had
never even given any thought to how the servos work. Very interesting now
that I've had that little exposure.
Dependent upon the model, 5 or 6 vacuum servos are used on the GMC. To
control temperature also would require another, and that's the only one that
needs proportional control -- the others can be "bang-bang".
I'm suspecting that the electronic servos used in cars operate similarly to
the RC units, and will probably be more suitable for our use because of
size, voltage, and cost.
You may have heard of Hodges Hobbies (home of the model B29 carrying the
X-1). It's about 3 miles from here. I'll go out there and get a little
more education. GOSH, I hope I don't get another addiction!
Ken H.
On Thu, Jan 27, 2011 at 9:34 PM, gene1@daygotours <gene1@daygotours.com>wrote:
> Ken,
> RC servos come in many sizes, but a standard servo would drive most AC
> doors. Here is a site that describes it all. Many RC guys have tons of
> old
> ones.
>
> http://www.horrorseek.com/home/halloween/wolfstone/Motors/svoint_RCServos.html#Avail
> I do have a lot of used RC servos since I mostly fly the small BNF planes
> now, whose servos wouldn't open any door.
> A control device to adjust each servo is also described. They usually
> operate on 4.8 Volts, DC, but 6 Volts make them a little faster and a
> little
> stronger. Go to a RC swap meet, you will generally find a lot of RC servos
> for sale. Try RC swap meet in Goggle.
> How many servos did you say would need for a GMC?
> Gene 76 Eleganza North County San Diego
>
>
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
Goto Forum:
Current Time: Mon Oct 07 12:31:10 CDT 2024
Total time taken to generate the page: 0.02947 seconds
|
GMCforum
Search
Help
Register
Login
Home
