Shopsmith Forums

dgreen810 wrote:jsburger

"That is what I thought. Did any SS speed dial have X, Y and Z on it?"

What are you trying to imply? You asked for a picture of a chart with letters not on the speed dial and I provided that.
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I don't know, I am not a collector of speed dials. I only have two to look at. X Y & Z are not on either.

JPG

Shopsmith Mark V Owner's manual, page 21

Don G

Sorry Don, I was not trying to imply anything. I was replying to JPG's comment of "interesting". The chart you posted is interesting to me also. How is that implying anything?

I too only have two and they don't have X, Y and Z. Hence my question? I have a 53/54 Greenie and the speed dial only goes W.

The other interesting thing about the speed chart you posted is that besides having letters that don't exist all the other letters speeds are different than the chart I posted.

I have attached the chart from my manual dated 1992 and it agrees with PTWFE dated 1989 and the chart from the post above.

What is the date of your manual? It is interesting that SS made such a mistake in the chart.

I have this handy item, dated 2011, and coincides with JSB 2nd pic speeds/letters.
http://www.shopsmith.com/ownersite/cata ... _chart.htm

jsburger

John sorry if I jumped to a wrong conclusion, I thought you were implying that I was posting some BS out of the blue. We are now at the crux of the matter and why I made the original post of wanting a "Current" speed chart. It seems there are several different speed/letter combinations shown in various legitimate SS publications. This last SS Mark V I bought as you know had the speed changer in a shoe box. I bought a tachometer and was in the process of setting high speed and had difficulty finding out "High Idle RPM". I have come to the conclusion that it is 5200 RPM and am going to go with that unless someone tells me different.

It's my understanding if I set "High Speed" at 5200 RPM, all the other speed/letter indents set automatically.

Again thanks very much for posting the speed charts that are a helluva lot more current than mine.

Don G

ERLover

That is a neat chart, but it has "No" meaning unless you get the letters labeled correctly with the correct RPM that goes with it.

jsburger

"What is the date of your manual? It is interesting that SS made such a mistake in the chart".

John the publish date is posted a few posts back.

Don G

dgreen810 wrote:ERLover

That is a neat chart, but it has "No" meaning unless you get the letters labeled correctly with the correct RPM that goes with it.

jsburger

"What is the date of your manual? It is interesting that SS made such a mistake in the chart".

John the publish date is posted a few posts back.

Don G

A bit confused on your comment about NO Meaning?? I think you mean the speed has to be adjusted/corrected? Then they will/should be in line.
I have only redone internally 1 V and did the speed adjustment, I go by sound and vibration, and then there are the 3 ERs with speed changers, dont need to fool with that letter crap on them.

dgreen810 wrote:JPG

James
This is page 19 of my original owner's manual with the machine EM 9100-C dated 2/63

Don G

Same page 19 as my '1/62' vintage.

5200 is the 'published' speed at 'fast'.

More important than the actual rpm is the 'high speed adjustment'.

Nowhere in the SS literature does it say to set the speed to 5200 at fast.

There are several variables with the reeves drive that make a concise determination of speed at a particular dial setting inexact.

That is the reason for the alphabet nonsense to begin with. The chart settings are an approximation at best.

Belt tension/wear and sheave alignment/wear all cause speed variation at any dial setting as well as dial registration.


So what I consider 'normal' is to the perform the high speed adjustment, observe belt locations at fast(set with high speed adjustment) and slow(idler pulley near outer rim) and make sawdust.

It is true that the speed dial settings are not linear. They also vary depending on if you are going up the dial or down. If I recall it is worse at near mid dial.

Some place I played with the dial setting and a $10 electronic tachometer which I believe was quite accurate despite the cost. I did this on two machines so the sample size was small but none the less I believe representative of the drive system.

I haven't seen the data in years so I don't know if I can locate it anymore. I also can't duplicate it since both the machines that I tested are now powerpro models.

You can also see the non-linearity just by graphing speeds from the chart to the letters. I'd do that for you but I'm not feeling like it so someone with the skill go for it.

As has been mentioned none of this means much but if you like to play with such things like I do then it can be fun.

Ed

Got my shower in and had about 20 minutes before I can take my pills so I figured it wouldn't take long to do a chart based on the data from one of the earlier posts. I have no idea what the real numbers were/are but if someone likes this sort of thing be my guest in collection the data. Like I said right now I have no machines to collect data from.
Ed

Just for grins here is a chart if the change were linear. Keep in mind this is not the real world here, its just a made up chart.
Ed