Forrest Addy
Diamond
- Joined
- Dec 20, 2000
- Location
- Bremerton WA USA
Machine tool motors, hand power tools, anything with a rotating mass for that matter requires some minimum standard of balance to function properly. Power tools that leave your hand tingly slowly degrade your sense of touch. Machinery with dodgey motors telegraph vibration into cut surfaces, etc. Out of balance poses a real problem. The remedy is to balance the rotating parts but that requires a tear down, sending out the parts a day or three in limbo, then the assembly. PITA and in the meanwhile progress has halted for everything down stream of the equipment out of service.
We now have smart phones elaborately equipped with an array of sensosr including a accelerometer and a gyro. These are sensitive as hell, equal to the sensors on a balance machine. Load up a vibration app, set the phone on the table in a quiet room and the phone will register in the squiggly line fall of a green pea onto the table from an inch of height.
Quadracopter drone nuts balance their lift motors with a smart phone: There's some relevant videos on YouTube
What's needed is an app designed to meet the needs of on-machine balancing. Set the phone on the motor and the app determines the motor RPM from the cyclic nature of the vibration then goes on to quantify it and if the distance between bearing is entered diagnose the accelerations and phase relationship for each Add a known trial weight like the hub and enter its radius and location from a particular bearing and it will tell you the amount, radius, and, angle for correction for each re-position presuming 90 degree intervals.
Take it a step farther. Buyers of junky import power tools often complain of out of balance borne vibration. Take your handy smart phone app, remove the armature, cobble up wooden V's spaced on a board at the armature bearing centers, stick the phone on the board connecting the V's, spin the armature by some means, and the phone will tell you how much and where to correct.
The challenge therefore is to the geeks who frequent this forum: write an app to do the above. A grateful world will reward you with 32 virgins.
I'm old and no longer have the smarts or I'd do it and make everyone jealous.
We now have smart phones elaborately equipped with an array of sensosr including a accelerometer and a gyro. These are sensitive as hell, equal to the sensors on a balance machine. Load up a vibration app, set the phone on the table in a quiet room and the phone will register in the squiggly line fall of a green pea onto the table from an inch of height.
Quadracopter drone nuts balance their lift motors with a smart phone: There's some relevant videos on YouTube
What's needed is an app designed to meet the needs of on-machine balancing. Set the phone on the motor and the app determines the motor RPM from the cyclic nature of the vibration then goes on to quantify it and if the distance between bearing is entered diagnose the accelerations and phase relationship for each Add a known trial weight like the hub and enter its radius and location from a particular bearing and it will tell you the amount, radius, and, angle for correction for each re-position presuming 90 degree intervals.
Take it a step farther. Buyers of junky import power tools often complain of out of balance borne vibration. Take your handy smart phone app, remove the armature, cobble up wooden V's spaced on a board at the armature bearing centers, stick the phone on the board connecting the V's, spin the armature by some means, and the phone will tell you how much and where to correct.
The challenge therefore is to the geeks who frequent this forum: write an app to do the above. A grateful world will reward you with 32 virgins.
I'm old and no longer have the smarts or I'd do it and make everyone jealous.