RE: [CAD_CAM_EDM_DRO] Gecko wiring question

What you probably haven't done ids tie your 5v power supply ground to
your computer ground i.e. they must have a common ground.

So you take the ground only of your 5 v supply and connect to the ground
pins on your printer cable or breakout board etc.

Hope that helps.

David

PS you can also take a signal generator and send a square wave to your
gecko (TTL - 5v) with the pos (red) lead at the 5v in pin and the ground
(black) on the step pin and see if your drivers are moving.

PPS you can even use a pushbutton switch and connect up 5v and put the
switch between gnd and step, push it on and off really fast and see if
your motor moves.


-----Original Message-----
From: Tim Goldstein [mailto:timg@...]
Sent: Thursday, January 16, 2003 11:06 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Gecko wiring question


Do not hook any of the wires from the computer to term 1 or 2. Your
ground for the logic is the step and direction line. The optos turn on
when the step and direction pins are low (or ground) and the current
flows from the
+5 V controller source. When the pins go high (+5 v) there is no
+potential
as both sides of the opto are now at +5 V and no current flows.

Tim
[Denver, CO]
Sherline products at Deep Discount
Mach1 & DeskCNC with Credit Card ordering www.KTMarketing.com/Sherline
www.KTMarketing.com/DeskCNC

----- Original Message -----

> This is about the wiring of the power to a gecko 201a.
> term.1 power ground
> term. 2 motor power + 24-80V
> Term. 10 5vdc from controller.
>
> OK the question is I run a + an - from the power supply to term 1 and
> 2. no problem. I also run a +5vdc line from the controller. but what
> about the negative for from the controller? do I just run it to
> term.1? I read something, but don't remember where about burning the
> opti iso. on geckos if you goofed up the grounding. that is why I'm
> asking this "stupid question".
>
>
> Thanks
>
> Jerry
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html



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