looking for a electronic tach

[dmanlyr]

I have a D950 engine in a hydraulic power pack and am looking for a electronic type tachometer for it. Since most of the older Kubota tractors used mechanical tachs, has anyone found a electronic style tach?

I would assume that it would run off the alternator signal or I guess I could add a pickup on the flywheel?

Thanks, David

 

[eserv]

I have a D950 engine in a hydraulic power pack and am looking for a electronic type tachometer for it. Since most of the older Kubota tractors used mechanical tachs, has anyone found a electronic style tach?

I would assume that it would run off the alternator signal or I guess I could add a pickup on the flywheel?

Thanks, David

This http://tinytach.com/diesel.php Is the coolest one I know of! It gets a signal from the swelling of a injector line!

 

[Stumpy]

That's the one I was going to suggest. Haven't used one (though I will shortly) but I hear about them from time to time. Always good things.

 

[sparkymiller]

Problem with them...you cannot replace the battery !! Only good for about 6-8 years..makes it kindy pricey in the long run.
I made my own for about $40 using a bigger display as well.

 

[lsmurphy]

Problem with them...you cannot replace the battery !! Only good for about 6-8 years..makes it kindy pricey in the long run.
I made my own for about $40 using a bigger display as well.

Are you going to expound on that? Pics? Design?

 

[dmanlyr]

Thanks for the ideas, I think I will look into the tiny tach.

On a side note, does anyone know where the mechanical tach hooks into the engine on a D950?

David

 

[Stumpy]

They're usually driven off the front of the fuel cam on Kubota engines.

 

[kubotasam]

Problem with them...you cannot replace the battery !! Only good for about 6-8 years..makes it kindy pricey in the long run.
I made my own for about $40 using a bigger display as well.

I think we are all waiting for your design to build your own tach!!
Please post a parts list or pictures or something.

 

[sparkymiller]

Super simple, take almost any PIC ( 16F648),add a 2x16 LCD module,wee bit of code and the sensor.I used an optical sensor(think PC mouse) for the pulse pickup,though if gas, off the points works very well,or wrap 4 turns of wire over #1 plug.I used a 4x20 display so I could make 'old man' sized numbers.Power comes from battery through small switching power supply,couple of pushbuttons for 'setup'.
There are tons of 'tachometer projects' on the Web,classic 'school project'.You can get plain or fancy all depends on what you like.
Cost...PIC $2,LCD $5,sensor $4, case $5,misc $10..Code...about 3 nights...

Jay

 

[Lil Foot]

Super simple, take almost any PIC ( 16F648),add a 2x16 LCD module,wee bit of code and the sensor.I used an optical sensor(think PC mouse) for the pulse pickup,though if gas, off the points works very well,or wrap 4 turns of wire over #1 plug.I used a 4x20 display so I could make 'old man' sized numbers.Power comes from battery through small switching power supply,couple of pushbuttons for 'setup'.
There are tons of 'tachometer projects' on the Web,classic 'school project'.You can get plain or fancy all depends on what you like.
Cost...PIC $2,LCD $5,sensor $4, case $5,misc $10..Code...about 3 nights...
Jay

Well, I'm glad that's all cleared up.

 

[bulldog_shotgun]

Super simple, take almost any PIC ( 16F648),add a 2x16 LCD module,wee bit of code and the sensor.I used an optical sensor(think PC mouse) for the pulse pickup,though if gas, off the points works very well,or wrap 4 turns of wire over #1 plug.I used a 4x20 display so I could make 'old man' sized numbers.Power comes from battery through small switching power supply,couple of pushbuttons for 'setup'.
There are tons of 'tachometer projects' on the Web,classic 'school project'.You can get plain or fancy all depends on what you like.
Cost...PIC $2,LCD $5,sensor $4, case $5,misc $10..Code...about 3 nights...

Jay

sounds good, now you got my brain stewing. i could build a sweet hour meter, maintenance moniter, tach with an arduino.

 

[sparkymiller]

Yup, any micro will do..I just have 20+ years of PICs and it's too hard for me to change, though the $35 RaspberryPI is mighty tempting !
Though I did 'jump ship' and bought this 'project' Kubota....my 5 other tractors are all older Allis-Chalmers!!