For double rotary station even number stations possible or not, why?

Quality Assurance
1

For double rotary station compression machine only odd number stations possible and even number stations available or not

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2
  1. Double rotary station compression machine has odd number of stations for dynamic balancing of machine.
    2.To avoid machine vibration and excess noise.
  2. If it has even number of stations then both punches arrives simultaneously on rollers. Due to this there will be very high load on motor.