 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
nuckolls.bob(at)cox.net
Guest
|
 Posted: Mon Jun 09, 2008 9:35 am Post subject: Ray Allen Position Indicators (OOPS!!!) |
 |
|
At 05:26 PM 6/8/2008 -0700, you wrote:
| Quote: |
I'm trying to wire an RP2 Position indicator to a SPAL Linear Actuator as
shown here:
http://www.rayallencompany.com/products/indsens.html
http://www.surpluscenter.com/item.asp?UID 08060818580918&item=5-1577-2&catname=electric
I'm trying to figure out the wiring between the indicator (orange, green
and blue wires) and the linear actuator's built-in potentiometer (purple,
white and yellow wires). I'm hoping I could just figure out which wire
represents what, connect appropriately, and adjust the indicator's
sensitivity and/or add resistors where necessary.
How could I be checking this? Is it as simple as measuring resistance
between wires in different positions? Any help is appreciated!
Thanks,
Dan Ginty
|
SCRATCH THE PREVIOUS POST. I realized that your were
trying to integrate a third party actuator with
the Ray-Allen indicator. As I was revising my
posting, I accidently produced a set of keystrokes
that SENT the unfinished message.
Here's the REVISED POSTING that goes to your task . . .
Use your multimeter to find which of the two potentiometer
connections out of the actuator DO NOT CHANGE RESISTANCE as the
actuator moves. Use a battery to drive the motor while
watching the multimeter. These are the ENDS of the potentiometer.
Once identified, you need to know which wire is the EXTEND
end of the pot leaving the other one as RETRACT end
of the pot. Hook your multimeter to ONE of the ENDS
and to the third wire identified as NOT an END.
Drive the motor in RETRACT direction and watch the multimeter
for resistance reading. If the resistance reading
is going DOWN, then you're attached to the RETRACT
end. If the reading is going UP, then you're attached
to the EXTEND of the pot.
Now, you can take a copy of the drawing I posted at:
http://www.aeroelectric.com/PPS/Flight/Trim/PitchTrim.pdf
and mark up the schematic's ORN/GRN/BLU wires cited for
potentiometer leads in the actuator with the new colors
you've discovered during the experiment cited above.
Interestingly enough, connecting Ray-Allen colors to
extend/arm/retract colors you've deduced above still
leaves you with a 50/50 chance of getting it hooked up
right the first time. If the indicator reads backwards
from the true trim-up/trim-dn motion of the actuator,
you'll need to REVERSE THE END CONNECTIONS to the
actuator's position reporting potentiometer.
Obviously, this situation does not support the rant
on RAC contained in the previous posting.
Bob . . .
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
 |
txpilot
Joined: 26 Feb 2007
Posts: 87
Location: Houston, TX
|
| Posted: Mon Jun 09, 2008 7:58 pm Post subject: Re: Ray Allen Position Indicators (OOPS!!!) |
|
|
Thank you, Bob! I tried it and it worked like a charm!
Best Regards,
Dan Ginty
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
Eric M. Jones
Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts
|
| Posted: Tue Jun 10, 2008 5:11 am Post subject: Re: Ray Allen Position Indicators (OOPS!!!) |
|
|
I have studied these for a while and an planning a version of my True Servo Control MAC/RAC (TSCMR) which will incorporate the panel bar graph. But for now, attached is a schematic of the Ray Allen trim box and indicator. Most people might want to keep these with their wiring book.
Hope this helps.
"A witty saying proves nothing."
--Voltaire
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
| Description: |
|
Download |
| Filename: |
Mac Servo and Indicator wiring ae.pdf |
| Filesize: |
40.67 KB |
| Downloaded: |
481 Time(s) |
_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net |
|
| Back to top |
|
|
hmanvel(at)manvel.com
Guest
|
| Posted: Tue Jun 10, 2008 5:38 am Post subject: Ray Allen Position Indicators (OOPS!!!) |
|
|
Eric,
You seem to know the MAC trim system, maybe you can offer an opinion. My
bar graph indicator has always gone bonkers when in flight, but at idle on
the ground works normally. No amount of shielding, rewiring etc. has been
able to stop this. The folks at the factory really had no clue as to what
might cause it. Any thoughts on that?
Harry Manvel
Defiant N2HM
PTK / Pontiac, MI
---
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
