bforu_gs:
I think my transformer/power supply is short of capacity. My transformer is of 1 amp, 12 volts, my servos are Acoms IC AS2. I don't have any identification for my steppers. All steppers and servos are given individual power supply. Can you suggest me how to overcome this situation. Let me know if you want further information.
Ok, this part is a bit unclear... You state you have a transformer providing 1 A @ 12 VDC (presumably from your local electrical mains). However, then you state that each stepper and servo has an individual power supply. Do you mean that the motors all have individual connections, perhaps with some step-down circuitry, or is there another source of power beyond the transformer you mentioned?
If it's the first case, then the power for the entire project is really being supplied by the AC-to-DC transformer and 1 A won't be enough current for all the motors. While there are ways to increase the current (at lower voltage, but that wouldn't be a problem in this case), you still only have a total of 12 W to work with. Therefore, you really need to get a AC-to-DC power supply with more current. I'd recommend getting one with a current rating of 4 A or 5 A if possible, at least 3 A at minimum. While the motors won't always all be drawing their peak currents, getting a supply that can handle that situation will avoid problems like the one you describe.