RE: [CAD_CAM_EDM_DRO] +5V

Tim,

The breakout board that I had built has a 5 volt supply built on the board.
The ac input is from a small transformer. The ground for the supply is
connected to the ground pins on the DB25. The 5 volt supply is only used to
power the optical isolators in the G210. Mine works fine.

Bob Campbell

-----Original Message-----
From: Tim Goldstein [mailto:timg@...]
Sent: Sunday, March 17, 2002 3:40 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: RE: [CAD_CAM_EDM_DRO] +5V


You can pick it up from the mouse port or game port if it has one. If
you are going to get the +5 from the transformer how are you going to
complete the circuit with the step and direction signals? That is what
the + 5 does. It is not a voltage supply except for the optos and if you
don't have this coming from the computer then you will not have any
motion.

This issue seems to give many people problems. I other drives where you
connect the drive to gnd and the step and direction pins you are using
the step and direction pins as the + 5v source and just not calling it a
positive. In the Geckos you are using the step and direction pins as a
gnd and then need the +5v as the common to complete the circuit.

Tim
[Denver, CO]
http://www.KTMarketing.com/CNC.html

> Hi,
>
> From previous posts, it is clear that the best solution to provide
> the +5V for the Gecko drives is to tap it from the PC itself.
> However, if one is to use a notebook computer, even if that can be
> done easily, I think one would be very about tapping the +5V from the
> notebook. I hope to provide for an independent source of +5V from the
> power supply of 48V. What is the best way to provide for this?
>
> Thanks in advance.
>
> Meneer

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