Hi there - I am extremely new to wiring and electronics and am actually a photographer. Nevertheless, I needed a motorized slider to take perfectly smooth video pans. To save money I tried making my own.
After much trouble I have basically found a solution I think works pretty good. However, there are two central issues I am facing right now.
Firstly, I invested in a PWM because I thought it would maintain more power at lower speeds (rather than a potentiometer). Unfortunately, when I try to dial down the PWM and go slow, the motor will start to jitter and even stall on and off. I have to increase the speed in order to maintain a more regular amount of movement.
Secondly, even when moving at a higher speed, there seem to be fluctuations in the speed that I can only attribute to what I have read is "torque ripple", although it may just be fluctuations in other factors I'm not aware of.
Basically, is there a way to wire the motor in a way that smooths out its speed, somehow making it perhaps slow-start but then maintain a constant voltage/speed, or at least minimize these issues?
I read somewhere that people add capacitors to motors, but it seemed to be to reduce electrical noise. For some reason I thought it may provide a "buffer" so that the motor always has voltage to draw from, thereby maintaining a more constant torque.
I have also read that servos somehow work in similar ways, but I don't know if getting one would solve this issue.
Thanks.
After much trouble I have basically found a solution I think works pretty good. However, there are two central issues I am facing right now.
Firstly, I invested in a PWM because I thought it would maintain more power at lower speeds (rather than a potentiometer). Unfortunately, when I try to dial down the PWM and go slow, the motor will start to jitter and even stall on and off. I have to increase the speed in order to maintain a more regular amount of movement.
Secondly, even when moving at a higher speed, there seem to be fluctuations in the speed that I can only attribute to what I have read is "torque ripple", although it may just be fluctuations in other factors I'm not aware of.
Basically, is there a way to wire the motor in a way that smooths out its speed, somehow making it perhaps slow-start but then maintain a constant voltage/speed, or at least minimize these issues?
I read somewhere that people add capacitors to motors, but it seemed to be to reduce electrical noise. For some reason I thought it may provide a "buffer" so that the motor always has voltage to draw from, thereby maintaining a more constant torque.
I have also read that servos somehow work in similar ways, but I don't know if getting one would solve this issue.
Thanks.