Re: [CAD_CAM_EDM_DRO] Re: Harrison Lathe and Gecko's

Hi Jon,

I have just finished waving my multimeter around the machine and got some
surprises.

On the 415v tap the supplied voltage is 97.8, where as if the mains is
across the 440v tap the supplied voltage is 91.5. The original drivers will
stand 120 volts DC and the 24 volt line can be anywhere from about 15v to
30v and still not cause problems with the logic.

I will try the same test tomorrow feeding the transformer from a single
phase supply. If I get no joy here there is always a separate supply for
each stepper driver and I can use a gecko or similar for this axis.

Regards,

Terry

> Yes, that will reduce the output voltage. This appears clearly from
> your desciption to be
> a transformer-rectifier power supply, so there is no way this could
> cause damage to the
> power supply. But, 61 *(415 / 440) * 1.414 still equals 81 V, which is
> high for the Gecko.
> If your line voltage is lower than 415, though, maybe that will come out
> right. Do you get
> 61 VAC now from the transformer? Or is that the nominal rating on it?
> What is the
> DC output you read from this supply?
>
> Jon