I got me one of these! HASLER SPEED INDICATOR

RandyWilson said:
Old car speedometers could be accurate, if they tried. Witness the police certified units. But most were made to budget with aesthetics a primary factor. It's hard to be accurate when your entire range is covered in 60-90 degrees of sweep.

I'll put up a picture of the tach I found in the barn this evening. Accurate or not, it is an impressive piece.
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Auto speedometers are inherently inaccurate. They rely on the tire diameter being constant, which it never is. Also, a new set of tires will be a different diameter. Then they ran it through a cable to a drum with a magnetic follower, which has no inherent accuracy. Yes, they were calibrated, and still are, but they become inaccurate immediately, the calibration is just a useful talking point in court.
 
4gsr said:
Anyone know where I can buy some of the reflective tape. All of my stickers that can with mine lost their glue. I did get a White paint stick to work, but would rather have the stick on reflective tape.
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Go get Aluminum Tape in the HVAC area in the HD, or LOWES. Used for sealing insulated air ducts.
I use it for a lot of things. It's durable, reflective, and hold tenaciously, but can be peeled because it's AL, not paper
 
Well, I just got this thing in the mail. It's SUPER NICE! :D I mean, it doesn't hardly look like it has ever been used. The case doesn't even have a scuff on it and the felt lining is perfect. The device doesn't have a scratch and the rubber wheels are even in great shape! I would have to say that this is pretty much mint! I got all excited, read the instructions, ran out to the shop, chucked up a piece of round bar and tried it out. It worked flawlessly! :grin big: Now I don't know how accurate it is. I'll have to compare it to another device or something known but so far I'm really happy with it. It's super simple to use also. Now my only question is, it has a small oil hole on the shaft. I'm wondering what type of oil to use? Maybe just a drop of 3 in 1 ?
 
Finster said:
What is the name of the app? I'll download it and compare it to this instrument.
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It's just called "Strobe Tachometer". I run it on an old iPhone. It was free in the app store.
 
Finster said:
Now my only question is, it has a small oil hole on the shaft. I'm wondering what type of oil to use? Maybe just a drop of 3 in 1 ?
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My vote would be spindle oil. Like Mobil velocite #6 . But that's cause I have it for the mill and cylindrical grinder. Very thin.
 
Update. Just checked the meter with LED driven from impuls generator - at 50Hz it shows 2960rpm and at 500Hz 29768rpm. Quite accurate. I also tested it at 6.5V supply voltage (dead battery simulation) - still the same, correct values. Looks like my diy meter is the bad one.
Quite impressive for 10$ meter...

Wysłane z mojego GT-N7100 przy użyciu Tapatalka
 
Bob Korves said:
Auto speedometers are inherently inaccurate. They rely on the tire diameter being constant, which it never is. Also, a new set of tires will be a different diameter. Then they ran it through a cable to a drum with a magnetic follower, which has no inherent accuracy. Yes, they were calibrated, and still are, but they become inaccurate immediately, the calibration is just a useful talking point in court.
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I was talking about the potential of the instrument itself. Yes, the drive mechanism was suspect. Still is.

This is the one I found in the barn, ex Father in law. It is truely a tachometer; readings in real time. IMAG0380.jpg
 
Well, I chucked up a piece of round stock on the lathe and drilled a center hole for testing this. The free app I downloaded on the phone was placing surface speed of the .750 round bar at 580 rpm. My antique Swiss timepiece was put in the center hole and measured 590 rpm. Now I don't know the math to figure it out (I'm sure someone here does) but I do know that the center will be spinning faster. That being said, it seems pretty good to me and as accurate as I need. If anyone can figure out the equation and see if they match, I would be interested, just for kicks. All in all, I think I scored pretty good. However, I hope it doesn't break, I doubt anyone could fix it and I believe the company finally went out of business in the 80's Not to big of a deal. I'll probably check all my belt settings on my machines, write it all down and it will sit in the drawer for the most part. Nice to have though.
 
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