[simpits-tech] Servo Feedback
Ken Trager
simpits-tech@simpits.org
Thu, 30 Jan 2003 10:39:27 -0800
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Will not work for a compass - 10 turns would be max - stepper motor with =
a home sensor
is needed for that - I have a chip fom E-lab,Inc. to drive a stepper =
motor but have not played with it.
BTW - for BCD inputs to the computer I asked about - I found out that =
you can use
a keyboard Encoder IC for that - just found it from E-lab. it will scan =
64 buttons and
return the switch position via the serial port.
Ken Trager
----- Original Message -----=20
From: Akin, Keenan L=20
To: simpits-tech@simpits.org=20
Sent: Thursday, January 30, 2003 7:14 AM
Subject: RE: [simpits-tech] Servo Feedback
Sounds great to me. Tell me when you figure out how to have =
continuous rotation in both directions to run a compass.
Keenan
-----Original Message-----
From: Ken Trager [mailto:kenamt@bellsouth.net]
Sent: Thursday, January 30, 2003 12:04 PM
To: simpits-tech@simpits.org
Subject: [simpits-tech] Servo Feedback
Greetings all
I am thinking ------ so let me throw out my idea
A servo from model airplanes run 90 or 180 degress - - - - right =
(for the MiniSSC)
The motor drives a feedback potentiometer of 5K - the motor will =
drive till it is=20
null out and the motor stops turning.
My instrument (Radar Altimeter ) is driven by a motor and has a =
feedback potentionmeter.
GREAT - ripped apart a old servo and disconnected the motor and pot =
from the servo
and used the servo board to hook up to the instruments motor and =
pot.=20
Guess what - - - - It worked!!!!!!
Here is the problem -
My Radar Altimeter needs 350 degress of movement for the neddle.
Now I know I can gear it to move 350 degress but that would be =
jumpie to much.
SO -- - - - - I am thinking of replace the 5K pot in the instrument =
with a=20
10 turn 50K precision potentiometer. Since it is a 10 turn - I think =
that
just one turn will give me 5K for what I need.
What do you guys think??????
Thanks
Ken Trager
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<DIV><FONT face=3DArial size=3D2>Will not work for a compass - 10 turns =
would be max=20
- stepper motor with a home sensor</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>is needed for that - I have a chip fom =
E-lab,Inc.=20
to drive a stepper motor but have not played with it.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>BTW - for BCD inputs to the computer I =
asked about=20
- I found out that you can use</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>a keyboard Encoder IC for that - just =
found it from=20
E-lab. it will scan 64 buttons and</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>return the switch position via the =
serial=20
port.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Ken Trager</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dkeenan.l.akin@boeing.com =
href=3D"mailto:keenan.l.akin@boeing.com">Akin,=20
Keenan L</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dsimpits-tech@simpits.org=20
href=3D"mailto:simpits-tech@simpits.org">simpits-tech@simpits.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Thursday, January 30, =
2003 7:14=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: [simpits-tech] =
Servo=20
Feedback</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D929091315-30012003>Sounds great to me. Tell me when you =
figure out=20
how to have continuous rotation in both directions to run a=20
compass.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D929091315-30012003></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D929091315-30012003>Keenan</SPAN></FONT></DIV>
<BLOCKQUOTE style=3D"MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> Ken Trager=20
[mailto:kenamt@bellsouth.net]<BR><B>Sent:</B> Thursday, January 30, =
2003=20
12:04 PM<BR><B>To:</B> <A=20
=
href=3D"mailto:simpits-tech@simpits.org">simpits-tech@simpits.org</A><BR>=
<B>Subject:</B>=20
[simpits-tech] Servo Feedback<BR><BR></DIV></FONT>
<DIV><FONT face=3DArial size=3D2>Greetings all</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I am thinking ------ so let me =
throw out my=20
idea</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>A servo from model airplanes run 90 =
or 180=20
degress - - - - right (for the MiniSSC)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>The motor drives a feedback =
potentiometer of 5K=20
- the motor will drive till it is </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>null out and the motor stops=20
turning.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>My instrument (Radar Altimeter ) is =
driven by a=20
motor and has a feedback potentionmeter.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>GREAT - ripped apart a old servo =
and=20
disconnected the motor and pot from the servo</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>and used the servo board to hook up =
to the=20
instruments motor and pot. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Guess what - - - - It =
worked!!!!!!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Here is the problem -</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>My Radar Altimeter needs 350 =
degress of=20
movement for the neddle.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Now I know I can gear it to move =
350 degress=20
but that would be jumpie to much.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>SO -- - - - - I am thinking =
of replace=20
the 5K pot in the instrument with a </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>10 turn 50K precision =
potentiometer. Since it=20
is a 10 turn - I think that</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>just one turn will give me 5K for =
what I=20
need.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>What do you guys =
think??????</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thanks</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Ken Trager</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial=20
size=3D2></FONT> </DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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