91 replies to this topic

[gaspen]

Good work !

Really getting somewhere.

 

Most distributors that have 2 springs will have 3 angles to the 'curve'.

 

Considering curve A in your diagrams, the first steep part is the lighter primary spring, the lesser angle is the heavier secondary spring and the plateau is when it's reached maximum advance.

 

Curve B has a sing spring or 2 matched springs.

 

Curve A on both diagrams are the centrifugal advance. The two parallel lines are the minimum and maximum values so it allows +/- 2 degrees tolerance

 

Curve B is the vaccum advance.

 

For example I have here the 25D 41026 dizzy from my850 with two different springs. I always thought that it works like I draw it on the diagram below

 

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[Spider]

Sorry, I thought you wanted assistance in interpreting the curves.

Yes, published Lucas curves are +/- 1 degree. While Vacuum can be plotted on a graph it's not normally done that way, just the figures for it's characteristics. It's not normally plotted as the vacuum can is only part of that 'story', the other part being how it's ported to the carb and it's characteristics on the particular manifold and engine it's fitted to.

[gaspen]

Sorry, I thought you wanted assistance in interpreting the curves.
 

 

Yes, indeed, but you referred to curve B as a dizzy with a single or 2 matched springs which confused me 

 

I guess the 2nd break on the 41254 curve is because of a "special mixture" of the two springs. 

Edited by gaspen, 09 February 2025 - 08:03 PM.

[68+86auto]

I know you are bored

 

Not at all.

[gaspen]

First light in the Universe 

 

https://photos.app.g...v8S1TKpDj8iYJ68

 

 

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Edited by gaspen, 16 March 2025 - 06:05 PM.

[68+86auto]

This may interest you. Jeff Schlemmer has removed all the internals from one of his sun machines and is converting it to electronic speed control as well as an LED conversion. All the original internals have been removed as they have proven to be unreliable (he uses these machines every day). He's using "wireless LEDs". I think the sun machine has an arrow shaped window that the light goes behind, originally a dim neon.
 FB_IMG_1742501434386.jpg   39.79K   3 downloads

Looks to be something like this:  Screenshot_20250321_061242_Opera.jpg   36.43K   4 downloads

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Edited by 68+86auto, 20 March 2025 - 09:56 PM.

[gaspen]

This may interest you. Jeff Schlemmer has removed all the internals from one of his sun machines and is converting it to electronic speed control as well as an LED conversion. All the original internals have been removed as they have proven to be unreliable (he uses these machines every day). He's using "wireless LEDs". I think the sun machine has an arrow shaped window that the light goes behind, originally a dim neon.
FB_IMG_1742501434386.jpg

Looks to be something like this: Screenshot_20250321_061242_Opera.jpg

FB_IMG_1742502425332.jpg

 

Thank you, that sound interesting 

 

Do you have a direct contact to him ?

Edited by gaspen, 21 March 2025 - 07:42 AM.

[68+86auto]

 

This may interest you. Jeff Schlemmer has removed all the internals from one of his sun machines and is converting it to electronic speed control as well as an LED conversion. All the original internals have been removed as they have proven to be unreliable (he uses these machines every day). He's using "wireless LEDs". I think the sun machine has an arrow shaped window that the light goes behind, originally a dim neon.
FB_IMG_1742501434386.jpg

Looks to be something like this: Screenshot_20250321_061242_Opera.jpg

FB_IMG_1742502425332.jpg

 

Thank you, that sound interesting 

 

Do you have a direct contact to him ?

 

 

This is where he has been posting about this conversion: https://www.facebook...01609380266329/

This is his website: https://www.advanceddistributors.com/ (his business is rebuilding Lucas distributors)

 

The conversion is still a work in progress so it's not tested properly yet.

Edited by 68+86auto, 21 March 2025 - 12:06 PM.

[gaspen]

Damn... 

 

 

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[gaspen]

I did not give up I've justing working on the body mostly 

 

I've attached two T-profile for the motor bracket and also the brush bracket. I will install the "face" of the instrument there

 

Now I have some light throught the slip ring assembly 

 

To be continued...

 

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Edited by gaspen, 30 June 2025 - 06:48 PM.

[gaspen]

Seems like the chunk needs some balancing

 

https://photos.app.g...TZBFRTCGN5HxrM8

[Spider]

I'm not sure it needs balancing, but the chuck has some run out / wobble. It doesn't look like it's been mounted quite on centre or flat.

 

If it does need balancing, you can do that yourself. Set up 2 parallel edges, dead level and place the shaft with the disc mounted across them, it will roll back and fith and eventually settle with the heaviest side down.

 

I have a set up similar to this for doing my grinding wheels;-

 

 

[gaspen]

I'm not sure it needs balancing, but the chuck has some run out / wobble. It doesn't look like it's been mounted quite on centre or flat.

 

If it does need balancing, you can do that yourself. Set up 2 parallel edges, dead level and place the shaft with the disc mounted across them, it will roll back and fith and eventually settle with the heaviest side down.

 

I have a set up similar to this for doing my grinding wheels;-

 

 

Yep : run-out is the correct phrase :)

 

During the build I fixed the 8mm dia. axle  with  the jaws of the chuck then fixed the hub and the disc. Maybe the "washer" below the chuck causes the run-out.

[gaspen]

The RPM measurement is working now 

 

https://photos.app.g...8JHbqhvwJBSwrX9

[gaspen]

Little update : instead of making the housing from MDF I found a sheet of aluminium. It is nor finished yet, I have to make the back and bottom panels

 

To be continued... 

 

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