Post by reynedrop on Mar 15, 2020 11:25:56 GMT -5
The pulleys or sheaves are the 2 discs that the belt slip on to. There should be a small one on the motor and a big one on one of the shafts.
Mavbe 1 inch(on motor) and the other is 4 inches(on shaft).
pulleys or sheaves. However some tumblers use gears reynedrop:
One tumbler is a 3 speed ? That makes things a bit more complicated. You would have to know the 3 motor speeds.
Some motors have the rpm rating stamped on them, others may not. Or possibly the specification sheet mentions the motor speed.
Most tumblers are under 60rpm meaning that you can easily physically count the number of spins per minute as Benathema mentioned.
By putting a mark or piece of tape on the barrel and count the number of times the mark or tape passes over the top as barrel spins over a 60 second period of time.
(A piece of tape shouldn't leave a mark on the tumbler)remember me, my feelings were hurt when you made a comment about my dirty tumbler.
I am ok now after intense therapy sessions. I only have 3 more sessions left !
Have you ever used your cell as a chronograph(stop watch) ? Or watching the second hand on a clock make one rotation ? 50 barrel rotations in 60 seconds = 50 rpm. Simple as that.
The 3 speed tumbler must spin at a very slow at low and middle speed; the barrel probably turns only 30 times in 60 seconds in low. Maybe 45 times in 60 seconds in middle.
Should be easy to count barrel rotations. A fast tumbler rotation would be 60 rpm, or one barrel rotation per second and also easy to count physically.
The speed on medium and high seems markedly faster than my Lortone 33B. Even the low setting seems like it might be faster. So I’m not optimistic that it’s 45-50 RPM.
I have tried to count myself, even doing 10-15 sec I can extrapolate like I do with HR. Unfortunately I think my eyes (or visual processing) are the problem here; when I try to focus on a mark to count rotations, my vision gets all effed up and I start feeling nauseated 🤢 I guess I’ll have to open up the machines and see what’s going on in it if I want to get an RPM