So I just bought a bunch of these
[www.mpja.com]
for $1 each!
They are 12V, 48 Ohm unipolar motors with six wires and a rated torque of 42 oz/in.
I am currently playing around with them. Wiring them up as a bipolar motor and leaving out the center taps gives me motion but very low torque at 12V. This is expected since the resistance is double what it would be under a unipolar wiring scheme. So I'll need a 24V supply at least for these motors. My question is what can I expect from performance?
By my naive Ohms law calculations a 24V supply should bring current to the levels of the original 12V unipolar drive conditions (about 0.25 A), while doubling power dissipation. My questions are as follows.
1. What happens to torque since both sides of each coil are on at the same time? (Rated torque is 42 oz/in)
2. Will I need to limit the current to less than 0.25A due to heat issues? (I'm thinking twice the power dissipated might end up overheating the motor or blowing coils. )
3. What about top speed?
[www.mpja.com]
for $1 each!
They are 12V, 48 Ohm unipolar motors with six wires and a rated torque of 42 oz/in.
I am currently playing around with them. Wiring them up as a bipolar motor and leaving out the center taps gives me motion but very low torque at 12V. This is expected since the resistance is double what it would be under a unipolar wiring scheme. So I'll need a 24V supply at least for these motors. My question is what can I expect from performance?
By my naive Ohms law calculations a 24V supply should bring current to the levels of the original 12V unipolar drive conditions (about 0.25 A), while doubling power dissipation. My questions are as follows.
1. What happens to torque since both sides of each coil are on at the same time? (Rated torque is 42 oz/in)
2. Will I need to limit the current to less than 0.25A due to heat issues? (I'm thinking twice the power dissipated might end up overheating the motor or blowing coils. )
3. What about top speed?