Hi!
I am building a tape delay pedal. I am using parts from an old cassette player. Now, a cassette player wants to run at constant speed so uses a capstan motor, therefore I can't influence the speed of the motor much. But I need to be able to vary the speed of the motor greatly. So as I see it I have two options:
1) Modify the capstan motor so that it is effectively a DC motor and I can control the speed
2) Buy a different motor
Option 1 is good because I can guarantee that it will fit the mechanics etc. However, I have no clue how I could do this.
Option 2 is good because it's probably easier. It's bad because I can't find a motor of exactly the right size and I have had bad experiences with noisy motors before.
So I have a couple of questions:
1. Does anyone have any idea how to influence the speed of a capstan motor, beyond the small potentiometer it has inside it which doesn't give much variation.
2. If I were to replace the motor with this motor (
http://www.rapidonline.com/electrical-power/trumotion-low-inertia-motor-6v-2700rpm-180710), do you think I would have an issue with noise beyond what I get from the original motor? Is there a way of knowing if this motor will be particularly noisy? (I am talking about electrical noise). This is an audio application and therefore I need to be careful
I realise this requires a little bit of speculation on your part as I can't give the specs of the original motor as I can't find it online, sorry
. I hope you can help.