I am new here, I actually work on application programming.
As a hobby I started to work with arduino and dc motors. Soon I ended up with backlash problems. Right now I am using a rotary encoder which give 4000 counts per rotation.
This is with a 12v planetary geared dc motor. I also tried with spur geared motor.
I am able to control the motor. But it's not very precise. The difference between counts changes each time.
For example, when I try to stop motor at 2000 counts it will stop anywhere between 2004-2016 counts. This problem is due to backlash. I connected the encoder to motor shaft using a timing pulley.
What if I attach a disc to motor shaft and stop it using solenoid. Anyone ever tried something like that or any other inexpensive idea.
I am from India and I do not get precise products easily here. I can post pictures of setup if needed. I shall give up with DC motor and opt for stepper?