RE: [CAD_CAM_EDM_DRO] Gecko power requirements

Wetland
Let me try to help I have the G210. Open up your case on the G210 or
if you have the G340. You will see the four jumpers in the corner of the
upper circuit board. It is configured at factory as a common ground as shown
in the picture of the g210 installation notes. Change
this to common volts as shown in picture.
Next open your computer case and take one of the loose extra power
connectors that plug into your hard drive, floppy, cdrom. As Tim said he ran
a single wire out the back and down the parallel port cable. Tap into the
red wire which is 5volts. Hook this up to the Gecko common pin. That's all
you have to do and put your cases back on.

What they are talking about is the parallel port cannot provide 5volt
power. It only provide a 5volt signal for high or 1. This is a floating
5volt through resistance that's what a open collector means
basically. When you apply a heavy enough load to a open collector the
voltage will drop down and this is not good.
Derek

From: "Doug Fortune" <pentam@...>

> To quote from the manual (G210 & G340):
>
> -------------
> INPUT OPTION HEADER
>
> The INPUT OPTION HEADER allows the STEP and DIRECTION
> optio-isolators to be configured as either common ground
> or common +5V DC.

This is the beginning of the connundrum.
I understand "common ground", but what is "common +5V DC"?

> If the G210/G340 inputs are driven by a source that has
> only ground available, such as a PC parallel port, move
> the 4 jumpers on the header so that it looks like the
> COMMON GROUND seeting. Connect the input driver ground
> to TERM 12 on the main connector.

That part is where it starts to get really muddy...

> If the G210/G340 inputs are driven by open collector
> transistors or standard TTL gates, move the 4 jumpers
> on the header so that it looks like the COMMON +5V DC
> setting.

Yep, that's the one.
No matter how hard I squint, this part just looks like Chinese to me.
Open collector transistors, standard TTL gates,
and that damned COMMON +5V DC thing again.
Might as well have been lions and tigers and bears, oh my~!
Sorry, lost me.

Remember, I'ma idjit.

Weyland



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