480 to 240 change over

    Pretty sure that unless you have something different, you will only find it to accept about 440 and up. The robot has an internal step down / isolation transformer that is critical to remain isolated even thought the final output of it is in the 200-220 range. Best / cheapest solution is to obtain a square D type 480 to 240 (or 208) transformer (big grey box) and reverse it to take 240 (or 208) up to 480 and feed that to your robot.

    Edited once, last by Chipprogr (October 19, 2012 at 4:12 AM).

    Quote from Chipprogr


    Pretty sure that unless you have something different, you will only find it to accept about 440 and up. The robot has an internal step down / isolation transformer that is critical to remain isolated even thought the final output of it is in the 200-220 range. Best / cheapest solution is to obtain a square D type 480 to 240 (or 208) transformer (big grey box) and reverse it to take 240 (or 208) up to 480 and feed that to your robot.

    How do i know its wired rite example on my mazak i know because the hydraulic system shows pressure.

    Edited once, last by blgmachine (October 19, 2012 at 6:22 PM).

    Are you asking how do you know if it is phased correctly? I can't remember if it will give you an alarm or not, but if not you can just wire up a small fan to one of your digital outputs, turn it on and make sure it spins the right direction. If not swap 2 of your wires.

    Quote from oakleyas


    You don't have to worry about phase issues with the controller. It has its own transformer and power supply.

    This is absolutely correct. It (almost) all gets turned into DC once inside, phase is irrelevant. Always check your final voltage before turning on the disconnect to the robot. Determine if you have 3 phase delta (240) or 3 phase Y (208) to get the transformer setup correctly.

    Good Luck-Eric

    small but important question here.

    I have purchased a s420f robot and I just got around to wiring it up last week. I have 208v 3 phase power in my shop. so I hook it up and I doesn't even turn on at all. not even the smallest bulb will flicker.
    is this because I need a transformer to bump it up to 440v ? I was reading my pdf manual I acquired and I see that some take anywhere from 240v, 440v and even 550v.
    could someone give me a push start on this ?

    thank you

    Hi John,

    You will first need to have a look at the power connection area and see what the robot is wired for. Then change if needed to the 440-480 setting. Get a 3ph transformer to bump up to that voltage/3ph and you will be ok. Remember... if your robot needs 10amps per leg at 480, then you need to provide 22-25amps per leg to the transformer. Double the voltage = half the amps available at the output.

    The extra amps of input also allow for transformer conversion losses and heat loss.

    Hope this helps -Eric

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