The answer is true. Two common reasons for a belt driven motor failure are improper pulley alignment, and over tightened belts. Along with this we have several other reasons for belt driven motor failure.
The belt driven motors come as a cheap alternative to the direct ones. These motors can absorb a considerable amount of shock and vibration which eliminates any need for gearboxes, speed as well as torque shifts.
The other reasons for belt driven motor failure can be debris in the timing pulley or the drive, damaged or even worn out pulleys, a weak drive structure, excessive load, under-tensioned belt or even misalignment.
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