hi all.
I'm building a simple mechanism to play a drum. I've got a 555 timing circuit to control the speed of a motor. first i built it like this (beware it's noisy):
YouTube - Drum Video
but, i don't like how erratic the mechanism is.
so i rebuilt it with a roughly 4 inch cam i made out of cardboard mounted directly to the motor. the drumming is less erratic now, except that the motors are burning out (i think). My guess is they're cheap motors, AND it's an off center load. Also, in both cases, I have to turn the PWM way up to get the motor going, then turn it down to where i want it. So, do i just need higher torque? or a different mechanism entirely? I like the cam because it allows gravity to come into play, but I'd also be willing to try some linkages to make linear movement instead. Unfortunately, I don't know how to make linkages without a prototyping machine. Also, I'd super love some worm gears that would fit my situation, again, don't know where to get them, or how to decide which ones I need. Anyone have any advice? I'd really love it.
I'm building a simple mechanism to play a drum. I've got a 555 timing circuit to control the speed of a motor. first i built it like this (beware it's noisy):
YouTube - Drum Video
but, i don't like how erratic the mechanism is.
so i rebuilt it with a roughly 4 inch cam i made out of cardboard mounted directly to the motor. the drumming is less erratic now, except that the motors are burning out (i think). My guess is they're cheap motors, AND it's an off center load. Also, in both cases, I have to turn the PWM way up to get the motor going, then turn it down to where i want it. So, do i just need higher torque? or a different mechanism entirely? I like the cam because it allows gravity to come into play, but I'd also be willing to try some linkages to make linear movement instead. Unfortunately, I don't know how to make linkages without a prototyping machine. Also, I'd super love some worm gears that would fit my situation, again, don't know where to get them, or how to decide which ones I need. Anyone have any advice? I'd really love it.