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Subject: Re: (SBIGUSER) ST7/G-11 ... HELP !!!!
From: Dick.Green.
Reply To: mapug@shore.net
Date: Tue Apr 23 16:42:23 1996

-- [ From: Dick Green * EMC.Ver #2.5.02 ] --

> 2) It is possible the there are spikes or too-sharp transitions in the
> inverter's output waveform, which may be transmitted as digital noise.
> This noise in turn is being picked up by the control inputs on the G-11
> and is being interpreted as motion commands. One has to ask though
> what benefit there is to run the ST-7 from an inverter, which itself
> needs to run from a 12V battery. You will get more efficiency (and
> probably a longer battery life) by powering the ST-7 directly. At the
> very least the connections will be simpler.

I'm afraid not. This seemingly easy task is actually easier said than done.
The ST7 DC power supply has three different output voltages: +12V, -12V, and
+5V. For someone with a bit of electronics experience, it would be feasible
to build a battery interface circuit with 78xx series voltage regulators,
but it's not a simple task for the typical user.

Dick Green.