Re: AC Servo question

I can answer some of my own question since I found some info on this
inverter. Hitachi does not recommend using it as a servo but I am not clear
weather the constant load threading application wouldn't work well.

Hitachi's words:
"NOTE: The SJ100 can move loads in both directions. However, it is not
designed for use
in servo-type applications that use a bipolar velocity signal which
determines direction."

----- Original Message -----
From: Andy Olney <aolney@...>
To: <CAD_CAM_EDM_DRO@onelist.com>
Sent: Wednesday, June 16, 1999 8:22 PM
Subject: [CAD_CAM_EDM_DRO] AC Servo question


> From: "Andy Olney" <aolney@...>
>
> Lathe and milling machine spindle control is a great feature for these CNC
> conversions but the power requirements to run a 1 or 2 HP spindle makes a
> stepper or DC servo a big expensive beast.
>
> There are now AC drives for 3 phase motors availible in the $200-$300
range
> with a pretty good speed range. Surplus 3 phase motors are cheap or may
> already be on your machine.
>
> Any clue if these have the response and low speed torque needed to slave a
> spindle to a lathe carrige to do threading?
>
> https://store.plcdirect.com has for instance a Hitachi SJ100 Micro drive:
>
> "Micro drive, 1 HP, single/three phase input, three phase output, 230V,
> sensorless vector or VF control modes"
>
> for $250.
>
>
>
>
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