Re: Converter or Inverter for 2hp Bridgeport mill

You may also be interested the GS2 series drives from
www.automationdirect.com these are rock solid full featured VFD's
with all the options (even serial com) and are very inexpensive.

Jeff


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "john_glynn57"
<john_glynn57@y...> wrote:

> I have just taken delivery of my own Bridgeport mill and want to
> know which is the best option for powering the machine : an

inverter

> or a converter.
> My research to date suggests that a Hitachi L100 inverter is the

way

> to go however I want to question this as follows:
> 1. I can run a dedicated 20A or 30A supply to the machine which
> should be able to handle the startup current demand of a converter.
> 2. If I use a converter I can use all the original Bridgeport
> systems without mosification ie Bridgeport speed control,forward

and

> reverse,3phase coolant pump and shaping unit which is attached to
> the machine.
>
> My plan is to circumvent the original Bridgeport wiring and drive
> the Main motor(s) directly from the hitachi unit and setting the
> motor speed at the low speed of 1400 and not using the valiable
> speed control of the machine at all. The hitachi will give me speed
> control by varying the frequency however I do intend to use the
> original forward reverse switch. In addition I plan to replace the
> coolant motor with a single phase model.
>
> Am I doing the right thing.