diesel tach
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Posts: 46,084
Anyone have any ideas how to pickup a signal for a
tach for a diesel. I was thinking of using a hall
effect transducer on the alternator fan blades anyone
have any better ideas.
Thanks Mikey
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tach for a diesel. I was thinking of using a hall
effect transducer on the alternator fan blades anyone
have any better ideas.
Thanks Mikey
__________________________________
Do you Yahoo!?
New Yahoo! Photos - easier uploading and sharing.
http://photos.yahoo.com/
Comments
source.
> Anyone have any ideas how to pickup a signal for a
> tach for a diesel. I was thinking of using a hall
> effect transducer on the alternator fan blades anyone
> have any better ideas.
off them.
--
Regards
Dave Evartt
American Hovercraft
engine pulley, then I fixed a halellement to pick up the signal. it
nevver faeiled to work.
Satchid
--- In basicstamps@yahoogroups.com, Bill Boyer <daweasel@s...> wrote:
> I was thinking on some diesels they used the alternator output as a
tach
> source.
>
> > Anyone have any ideas how to pickup a signal for a
> > tach for a diesel. I was thinking of using a hall
> > effect transducer on the alternator fan blades anyone
> > have any better ideas.
Original Message
From: "satchid23" <satchid@p...>
To: <basicstamps@yahoogroups.com>
Sent: Sunday, December 28, 2003 11:52 AM
Subject: [noparse][[/noparse]basicstamps] Re: diesel tach
> I had a diesel 20 years ago, and i glued a 1/4" suare magnet on the
> engine pulley, then I fixed a halellement to pick up the signal. it
> nevver faeiled to work.
>
> Satchid
>
>
> --- In basicstamps@yahoogroups.com, Bill Boyer <daweasel@s...> wrote:
> > I was thinking on some diesels they used the alternator output as a
> tach
> > source.
> >
> > > Anyone have any ideas how to pickup a signal for a
> > > tach for a diesel. I was thinking of using a hall
> > > effect transducer on the alternator fan blades anyone
> > > have any better ideas.
>
>
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>
> How about a photodiode through the fan blades or
> reflected
> off them.
I have a question about this...In the few posts about
the alternator being used as a tach-source, I have to
wonder, is it turning at the same RPM as the engine?
On all of my vehicles, it is not, but I don't know
about this diesel engine.
=====
Chris Savage
Knight Designs
324 West Main Street
Montour Falls, NY 14865
(607) 535-6777
http://www.knightdesigns.com
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>Anyone have any ideas how to pickup a signal for a
>tach for a diesel. I was thinking of using a hall
>effect transducer on the alternator fan blades anyone
>have any better ideas.
>
>Thanks Mikey
Mikey -
The diesel engines that I've worked with generally drove a tach sender from the
fuel pump. The tach sender is essentially nothing more than a small PM DC motor.
When a PM DC motor is spun, it produces a variable voltage which is proportional
to the shaft speed. Without using an actual tach sender you'd have check the
RPM vs. DC Voltage output to determine the speed. The DC voltage output could be
input to a ADC or possibly used with the RCTime command.
I don't know if the fuel pump runs at a 1 to 1 ratio with the engine or not, but
I'd guess that it does. I'm sure you'll see if that's not the case by testing.
Regards,
Bruce Bates
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I didn't think diesel's used spark-plug wires,
that's why they call them 'diesel' -- it ignites
the mixture with compression -- and sometimes
a glow-plug when the engine is cold.
SO, an 'electric' signal based approach wouldn't
work with a diesel. The magnet approach of course
is very clever, and would work on diesel or
gas engines.
--- In basicstamps@yahoogroups.com, "satchid23" <satchid@p...> wrote:
> I had a diesel 20 years ago, and i glued a 1/4" suare magnet on the
> engine pulley, then I fixed a halellement to pick up the signal. it
> nevver faeiled to work.
>
> Satchid
>
>
> --- In basicstamps@yahoogroups.com, Bill Boyer <daweasel@s...>
wrote:
> > I was thinking on some diesels they used the alternator output as
a
> tach
> > source.
> >
> > > Anyone have any ideas how to pickup a signal for a
> > > tach for a diesel. I was thinking of using a hall
> > > effect transducer on the alternator fan blades anyone
> > > have any better ideas.
high temperature glue.
Satchid
--- In basicstamps@yahoogroups.com, "Allan Lane" <allan.lane@h...>
wrote:
> Neat, what did you use for glue?
>
> I didn't think diesel's used spark-plug wires,
> that's why they call them 'diesel' -- it ignites
> the mixture with compression -- and sometimes
> a glow-plug when the engine is cold.
>
> SO, an 'electric' signal based approach wouldn't
> work with a diesel. The magnet approach of course
> is very clever, and would work on diesel or
> gas engines.
>
> --- In basicstamps@yahoogroups.com, "satchid23" <satchid@p...>
wrote:
> > I had a diesel 20 years ago, and i glued a 1/4" suare magnet on
the
> > engine pulley, then I fixed a halellement to pick up the signal.
it
> > nevver faeiled to work.
> >
> > Satchid
> >
> >
> > --- In basicstamps@yahoogroups.com, Bill Boyer <daweasel@s...>
> wrote:
> > > I was thinking on some diesels they used the alternator output
as
> a
> > tach
> > > source.
> > >
> > > > Anyone have any ideas how to pickup a signal for a
> > > > tach for a diesel. I was thinking of using a hall
> > > > effect transducer on the alternator fan blades anyone
> > > > have any better ideas.
small hole in the flywheel and using a machine screw to secure a magnet.
Having the glue let loose at the wrong time (and Murphy say's it will be at
the WORST possible time) could ruin your whole day.I also seem to remember
some flywheels already being drilled for balance, so please don't use a BIG
magnet that would unbalance anything.
Mike Sokol
www.modernrecording.com
mikes@m...
" One should not increase, beyond what is necessary,
the number of entities required to explain anything"...
-William of Occam-
Original Message
From: "satchid23" <satchid@p...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, December 29, 2003 12:54 PM
Subject: [noparse][[/noparse]basicstamps] Re: diesel tach
> I do not remeber, but I supose 2 component glue will work, loock for
> high temperature glue.
>
> Satchid
>
>
> --- In basicstamps@yahoogroups.com, "Allan Lane" <allan.lane@h...>
> wrote:
> > Neat, what did you use for glue?
> >
> > I didn't think diesel's used spark-plug wires,
> > that's why they call them 'diesel' -- it ignites
> > the mixture with compression -- and sometimes
> > a glow-plug when the engine is cold.
> >
> > SO, an 'electric' signal based approach wouldn't
> > work with a diesel. The magnet approach of course
> > is very clever, and would work on diesel or
> > gas engines.
> >
> > --- In basicstamps@yahoogroups.com, "satchid23" <satchid@p...>
> wrote:
> > > I had a diesel 20 years ago, and i glued a 1/4" suare magnet on
> the
> > > engine pulley, then I fixed a halellement to pick up the signal.
> it
> > > nevver faeiled to work.
> > >
> > > Satchid
> > >
> > >
> > > --- In basicstamps@yahoogroups.com, Bill Boyer <daweasel@s...>
> > wrote:
> > > > I was thinking on some diesels they used the alternator output
> as
> > a
> > > tach
> > > > source.
> > > >
> > > > > Anyone have any ideas how to pickup a signal for a
> > > > > tach for a diesel. I was thinking of using a hall
> > > > > effect transducer on the alternator fan blades anyone
> > > > > have any better ideas.
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
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>
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hall effect sensors that work off the ferrous metal gear teeth.
For example: http://www.allegromicro.com/datafile/archive/3046.pdf
With one of these you could count the teeth as they pass by the sensor.
Thus, if you can reach the starter ring gear or some other geared
sprocket on the engine, you could use one of these to count the tics and
get revolution information.
The mounting bolts or screws would work well too, as the screw or bolt
passed by the sensor it would count the tics too.
I used one of these on a vibration damper like pulley on the front of an
engine once. It was held on with four bolts. The sensor would count 4
tics per revolution of the pulley unit.
On the small lawn mower engines, they use a aluminum flywheel magneto
unit. The regular hall effect sensor picks up the magnet on each
revolution giving a good rpm count method too.
Original Message
From: Mike Sokol [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=2Kid60Mohysi0KOgbxzo6AnmkAbyD0hhsZs3P1pPt55EK9mwpT0uW5yNDIV7RgKuXzcKQD57vsMlk52kzqP1]mike.sokol@m...[/url
Sent: Tuesday, December 30, 2003 3:38 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Re: diesel tach
The glue idea is pretty clever, but I would consider drilling an tapping
a
small hole in the flywheel and using a machine screw to secure a magnet.
Having the glue let loose at the wrong time (and Murphy say's it will be
at
the WORST possible time) could ruin your whole day.I also seem to
remember
some flywheels already being drilled for balance, so please don't use a
BIG
magnet that would unbalance anything.
Mike Sokol
www.modernrecording.com
mikes@m...
" One should not increase, beyond what is necessary,
the number of entities required to explain anything"...
-William of Occam-
Original Message
From: "satchid23" <satchid@p...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, December 29, 2003 12:54 PM
Subject: [noparse][[/noparse]basicstamps] Re: diesel tach
> I do not remeber, but I supose 2 component glue will work, loock for
> high temperature glue.
>
> Satchid
>
>
> --- In basicstamps@yahoogroups.com, "Allan Lane" <allan.lane@h...>
> wrote:
> > Neat, what did you use for glue?
> >
> > I didn't think diesel's used spark-plug wires,
> > that's why they call them 'diesel' -- it ignites
> > the mixture with compression -- and sometimes
> > a glow-plug when the engine is cold.
> >
> > SO, an 'electric' signal based approach wouldn't
> > work with a diesel. The magnet approach of course
> > is very clever, and would work on diesel or
> > gas engines.
> >
> > --- In basicstamps@yahoogroups.com, "satchid23" <satchid@p...>
> wrote:
> > > I had a diesel 20 years ago, and i glued a 1/4" suare magnet on
> the
> > > engine pulley, then I fixed a halellement to pick up the signal.
> it
> > > nevver faeiled to work.
> > >
> > > Satchid
> > >
> > >
> > > --- In basicstamps@yahoogroups.com, Bill Boyer <daweasel@s...>
> > wrote:
> > > > I was thinking on some diesels they used the alternator output
> as
> > a
> > > tach
> > > > source.
> > > >
> > > > > Anyone have any ideas how to pickup a signal for a
> > > > > tach for a diesel. I was thinking of using a hall
> > > > > effect transducer on the alternator fan blades anyone
> > > > > have any better ideas.
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject
and
Body of the message will be ignored.
>
>
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>
> To visit your group on the web, go to:
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>
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I have seen in some old cars, they used an AC output of the generator
for a diesel tach.
Heinz
Original Message
From: Mike Sokol
To: basicstamps@yahoogroups.com
Sent: Tuesday, December 30, 2003 10:37 PM
Subject: Re: [noparse][[/noparse]basicstamps] Re: diesel tach
The glue idea is pretty clever, but I would consider drilling an tapping a
small hole in the flywheel and using a machine screw to secure a magnet.
Having the glue let loose at the wrong time (and Murphy say's it will be at
the WORST possible time) could ruin your whole day.I also seem to remember
some flywheels already being drilled for balance, so please don't use a BIG
magnet that would unbalance anything.
Mike Sokol
www.modernrecording.com
mikes@m...
" One should not increase, beyond what is necessary,
the number of entities required to explain anything"...
-William of Occam-
Original Message
From: "satchid23" <satchid@p...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, December 29, 2003 12:54 PM
Subject: [noparse][[/noparse]basicstamps] Re: diesel tach
> I do not remeber, but I supose 2 component glue will work, loock for
> high temperature glue.
>
> Satchid
>
>
> --- In basicstamps@yahoogroups.com, "Allan Lane" <allan.lane@h...>
> wrote:
> > Neat, what did you use for glue?
> >
> > I didn't think diesel's used spark-plug wires,
> > that's why they call them 'diesel' -- it ignites
> > the mixture with compression -- and sometimes
> > a glow-plug when the engine is cold.
> >
> > SO, an 'electric' signal based approach wouldn't
> > work with a diesel. The magnet approach of course
> > is very clever, and would work on diesel or
> > gas engines.
> >
> > --- In basicstamps@yahoogroups.com, "satchid23" <satchid@p...>
> wrote:
> > > I had a diesel 20 years ago, and i glued a 1/4" suare magnet on
> the
> > > engine pulley, then I fixed a halellement to pick up the signal.
> it
> > > nevver faeiled to work.
> > >
> > > Satchid
> > >
> > >
> > > --- In basicstamps@yahoogroups.com, Bill Boyer <daweasel@s...>
> > wrote:
> > > > I was thinking on some diesels they used the alternator output
> as
> > a
> > > tach
> > > > source.
> > > >
> > > > > Anyone have any ideas how to pickup a signal for a
> > > > > tach for a diesel. I was thinking of using a hall
> > > > > effect transducer on the alternator fan blades anyone
> > > > > have any better ideas.
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/basicstamps/
>
> To unsubscribe from this group, send an email to:
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>
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[noparse][[/noparse]Non-text portions of this message have been removed]