PRB Hudson PS2 conversion flywheel line thickness

Too fast means not enough stripes, if the flywheel really small?

Also Contrast is important on the stripes, is the white really white or a muddy color?

No, That will speed it up.  When the board senses 24 counts (Black to white is one count)then it thinks the motor turned one revolution.  If it is traveling too fast you need to trick the board into thinking less that one turn is one turn. So adding more stripes will make the board reduce voltage and get a speed reduction.  G

The other cause of too fast is too large a gap and the reader counts but miss some.  So it is raising voltage trying to get the 24 counts per appropriate time given the speed set.  G

The flywheel is only 1 inch diameter. I printed off the .050 stripes on Avery adhesive paper.

Thanks

Scott 

I  converted  a Weaver royal Hudson with a really small fly-wheel. If I remember correctly I eventually used the largest tape supplied with kit. The one at the top. It runs really well right down to 2 scale miles per hour. 

Since the thing is apart try different tapes...   Unless you're thinking of double heading the scale MPH doesn't really matter.  Let us know how it ends up... good luck.

Gregg,  That is the opposite affect.  I had a Weaver like that, but it was too slow initially.  Had to have 15mph rung up to get it to move.  It did have a small brass flywheel around 25mm.  I installed the 31.8mm tape with larger stripes so I had to cut off several to get it to fit on the smaller fly wheel and that fixed it right up.

His is starting up to fast so he needs to add more stripes which you can't do with the kit tapes if your flywheel is 27mm or smaller.  G

Sorry, I just got back to it. The gap is 1mm (.040). I also took a pen and drew over the stripes to make sure contrast was good. it still acts the same as yesterday. The tape I made up is about 7/32 wide, could that be an issue? 

I am in autocad making up a set of stripes about .045 wide to try. I'll let you know if it works out.

Many thanks

Scott

Hello all,

I made up a .045 thick stripe installed it and it improved drastically. May even want to go further but wonder if there is a point where the stripes are too close together.

Thanks

Scott

At some point, the tach will no longer read at higher motor speeds.

gunrunner had a attachment for the strips posted someplace ?

That is The Hickels program/formula.

Scott, If you have a MTH engine run it on the same track with your PRB Hudson and see if they match.  I would continue shrinking until you get a match, or the tach read can't read.  You may get it perfect.   G

The stripes I downloaded last year went down to .050 thickness- not sure if there are any smaller so I made .045 and .040 on my own.

Alternative is to add a double sided tape around the flywheel to increases diameter.  Or several layers of electrical tape.  That will allow more stripes of the current thickness, again slowing the engine down.  If your close getting one more stripe on the flywheel may do it.  G