Addicted

[JPG]

What distance?
Between the graduations on the scale? Or the amount that the arm actually moves when the pointer indicates 1 graduation?
Why the ? after your comment?

0 to 8 on the indicator. I am assuming equal spacing between the marks between.

The distance between 0 and 5 on the older version is 5/8".

Here is what I have done for the older version.

[ATTACH]14414[/ATTACH]

I also need the speeds for each mark(hi and lo range)


The '?' Unintentional. '!' was intended. No explanation for how that happened since I was apparently unconscious.




P.S. I am guessing 0 to 8 is 1".

[wiredone]

You are correct, the distance is exactly one inch.
The speeds, is anyone guess. I will try to hook one up on my one functioning unit and give it a whirl. I do have an old mechanical tach from the 40s that I use for this type of situation. It doesn't go real high though, maybe 4000 rpm,
What changed from the early to late to mitigate the extra 3/8 of travel?
Bigger pulleys?
I have one and a half more speedchangers both of E models, but they both have the 8 scale.
All the pulleys are right around 3.4" in Diameter.
How big are the ones with the 5 scale?

[JPG]

You are correct, the distance is exactly one inch.
The speeds, is anyone guess. I will try to hook one up on my one functioning unit and give it a whirl. I do have an old mechanical tach from the 40s that I use for this type of situation. It doesn't go real high though, maybe 4000 rpm,
What changed from the early to late to mitigate the extra 3/8 of travel?
Bigger pulleys?
I have one and a half more speedchangers both of E models, but they both have the 8 scale.
All the pulleys are right around 3.4" in Diameter.
How big are the ones with the 5 scale?

I think the control arm is shorter. The arm which the crank is moving.


My speed guesses are:
.....................O... ...1... ...2... ...3... ...4... ...5... ...6.. ....7... ...8
Low Range......425. ..505. ..600. ..720. ..850. .995. 1160 .1440 .1600
...Hi Range.....1850. 2300. 2750. .3300. 3775 4350 .5225 .6000 .6800

I find it interesting the indicator plate for the older version has blank space that appears to be where the 6,7,8 were 'added'.

Look for the speed changer installation paperwork. It should contain a speed chart.

[wiredone]

I think the control arm is shorter. The arm which the crank is moving.


My speed guesses are:
.....................O... ...1... ...2... ...3... ...4... ...5... ...6.. ....7... ...8
Low Range......425. ..505. ..600. ..720. ..850. .995. 1160 .1440 .1600
...Hi Range.....1850. 2300. 2750. .3300. 3775 4350 .5225 .6000 .6800

I find it interesting the indicator plate for the older version has blank space that appears to be where the 6,7,8 were 'added'.

Look for the speed changer installation paperwork. It should contain a speed chart.

I seem to recall that manual on PDF somewhere, but I can't find it. checked all of the usual suspects

[SDSSmith]

I think the control arm is shorter. The arm which the crank is moving.


My speed guesses are:
.....................O... ...1... ...2... ...3... ...4... ...5... ...6.. ....7... ...8
Low Range......425. ..505. ..600. ..720. ..850. .995. 1160 .1440 .1600
...Hi Range.....1850. 2300. 2750. .3300. 3775 4350 .5225 .6000 .6800

I find it interesting the indicator plate for the older version has blank space that appears to be where the 6,7,8 were 'added'.

Look for the speed changer installation paperwork. It should contain a speed chart.

Curious....what makes you think that the speed changer with the 0-8 range is newer or later version?

[JPG]

Curious....what makes you think that the speed changer with the 0-8 range is newer or later version?

I don't 'know' that. I only know there are two versions. I have assumed the 0-5 preceded the 0-8.

If you know better, do tell!:)

Also if you know the other difference(s) share that as well - please!;)

[wiredone]

Yes Please SDSSMITH, I'm all ears!
More Knowledge please!

[SDSSmith]

I always assumed the 'newer' version was the 0-5 speed changer in that it was part of my father's later model 10ER. No Ebay back in those days so it was unlikely that he picked up a version older than his machine. There was a good discussion about 5 years ago on the 10erusers group. Here is one response in that thread from one of the 'experts' on the 10E/ER:

Re: [SS10ERusers] Speed changer variation?
The early model speed changers had the 0-8 scale and narrow base
as mentioned. The main problem with them was that because the belts
tended to tilt the center sheave, one belt pushing one way on the top
of the pulley while the other pushes the other way on the bottom, the
center sheave would quickly wear and scar the steel center hub. They
added the broader base to help spread the load and as mentioned,
that caused the loss of range. The early models can be reworked and
modified to the later design by a good machinist.

Skip Campbell

[JPG]

I always assumed the 'newer' version was the 0-5 speed changer in that it was part of my father's later model 10ER. No Ebay back in those days so it was unlikely that he picked up a version older than his machine. There was a good discussion about 5 years ago on the 10erusers group. Here is one response in that thread from one of the 'experts' on the 10E/ER:

Re: [SS10ERusers] Speed changer variation?
The early model speed changers had the 0-8 scale and narrow base
as mentioned. The main problem with them was that because the belts
tended to tilt the center sheave, one belt pushing one way on the top
of the pulley while the other pushes the other way on the bottom, the
center sheave would quickly wear and scar the steel center hub. They
added the broader base to help spread the load and as mentioned,
that caused the loss of range. The early models can be reworked and
modified to the later design by a good machinist.

Skip Campbell

Do I understand that the center sheave with a 'fatter' portion at the center(shaft) is a 0-5 version, and that an 'earlier' version did not have that wide step on the sheave sides.

So the control arm does NOT vary.

I would think that with a restricted range of motion, that the resultant speed range would be decreased also.

Now I really would REALLY like to see the 'original' 0-8 speed chart!


P.S. This invalidates my speed chart guesses!