Speeds of Cuesmith Deluxe DC Motor

Buy a digital photo tachometer on ebay for $10. Put a dowel in the chuck and stick a piece of reflective tape on it. Wind it up and read the tach.

Kim
 
Thanks

I do have a tach from model engine use I will try that.



whammo57 said:
Buy a digital photo tachometer on ebay for $10. Put a dowel in the chuck and stick a piece of reflective tape on it. Wind it up and read the tach.

Kim
Click to expand...
 
the kidd said:
I do have a tach from model engine use I will try that.
Click to expand...

I got a futaba tach, but only has 100 rpm resolution.
I found that the lights put out 50-60 hz depending on where you live and made it impossible to get speed rating.
I made 6 white lines on the bar , turned off the lights and used a torch(flash light) then divided the number by 3, Used the 2 blade counter selection.

As far as I am aware, no one is making a counter that shows actual spindle RPM, only motor rpm. Been wrong many times before as well.

Now that I have a frequency drive, and know the pulley diameters, I can estimate the spindle speed . But it does not take into account belt slip etc.
That is why CNC spindles have rotary encoders on them. They will adjust the motor rpm to compensate for belt slip.
Neil
 
Kim has the correct answer I think. These optical tachs cost coffee money and work great. And you can use it as a learning tool so you can eyeball them in no time like an old hand.
$10? How can anyone live without one.
Mine reads very slow speeds <10RPM up to router speed.

Robin Snyder
 
carguy said:
Kim has the correct answer I think. These optical tachs cost coffee money and work great. And you can use it as a learning tool so you can eyeball them in no time like an old hand.
$10? How can anyone live without one.
Mine reads very slow speeds <10RPM up to router speed.

Robin Snyder
Click to expand...

I agree with Robin 100%, though I'm not sure about the eyeballing of speeds. My eyes get fooled by the different diameters of things - YMMV.

Gary
 
You knowing the RPM speed doesn't matter, you will know if it's to fast or to slow the part in the machine will let you know that. And the reason i know that is, if it did make a difference I WOULD HAVE ONE!!! HA HA
 
Thanks my tach 30 years old

The reason for the question was to get the exact speeds Chris told me but I wrote it down and immediately lost it. There is h,m,l and in between
Numbered dial.










conetip said:
I got a futaba tach, but only has 100 rpm resolution.
I found that the lights put out 50-60 hz depending on where you live and made it impossible to get speed rating.
I made 6 white lines on the bar , turned off the lights and used a torch(flash light) then divided the number by 3, Used the 2 blade counter selection.

As far as I am aware, no one is making a counter that shows actual spindle RPM, only motor rpm. Been wrong many times before as well.

Now that I have a frequency drive, and know the pulley diameters, I can estimate the spindle speed . But it does not take into account belt slip etc.
That is why CNC spindles have rotary encoders on them. They will adjust the motor rpm to compensate for belt slip.
Neil
Click to expand...
 
On the middle pulley like it comes set up your speeds are a little over 200 to 2000 rpms. I am clueless on the other pulley grooves as I almost never move the belt.
 
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I have never paid any attention to the rpms. If it's too fast I slow it down and if it's too slow I speed it up. Just make sure whatever you're cutting with is sharp, including sandpaper.
 
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