I have a pretty nice expensive hand tach , that's reflective or
mechanical That only works on the mechanical side . I need to get
inside it & see ifin I can find the problem .
animal
On 9/12/23 11:11 AM, Andrei wrote:
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You can always try it, but I think that unless you can ensure
the laser beam is reflected back within a few degrees of 0, you
might not get any counts.?
The laser is bounced of the tape after each rotation and there
is a sensor inside the tachometer that counts those "pulses".
That is how you get your RPM count.?
You could try polishing a small area, then if it fails to work,
just put the tape over it.?
Here is a picture of my tumbler jar (about 3-gallon size, i
think), that has been used to tumble brass for the past 3-4
years. This is the original tape.?
??? ??? I think / wonder if ya can get my with just super
polishing a small area instead of usin the tape . I've seen
some kinda gungy tape still work ?
animal
On 9/12/23 8:27 AM, Andrei wrote:
Please keep in mind
that you will need to put a little reflecting tape on
something that spins. that will reflect the laser beam back
to the device to count RPMs.?
Try to put it on
something that does not get much oil on it. You get plenty
of tape to replace, but if you get it all oiled up, you may
have to replace it more often.?
I put mine on the
spindle part that sticks out behind the chuck adapter plate,
and I have not changed it once in the last 3-4 years.
I am also using another
piece of tape on a rotary tumbler that I use for cleaning
reloading brass. Same effect. Has been working flawlessly
for the same amount of time with just one piece of that
magical tape.?
Moral of the story:
keep oil or coolant away from it, as much as possible and
mount the tape on a very clean, smooth surface.??
Andrei
At that price I can't say no- thanks Andrei.
On Tue, Sep 12,
2023, 10:04 AM Andrei <
calciu1@...>
wrote:
Buy one of these photo tachometers. It will
be more accurate than your calculations, as it
measure actual RPM of the spindle.?
Thanks Bill.? My motor is a craftsman
branded also with the 1/2 ID, but the prior
owner replaced the step pulley with a single
2.5 OD pulley.? I wanted to dust off the old
math book and using the manual, figure out
what speeds I'm getting.
On Mon, Sep 11, 2023, 5:20
PM Bill Pendergrass <
rzbill@...>
wrote:
Careful on the bore diameter. I believe
my original is 1/2 ID to fit the 40s
vintage motor.
