Re: [CAD_CAM_EDM_DRO] Re: Servo only moving one way

----- Original Message -----
From: "Mariss Freimanis" <mariss92705@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, March 12, 2004 3:13 PM
Subject: [CAD_CAM_EDM_DRO] Re: Servo only moving one way


> Jim,
>
> I'd strongly recommend you use a 74ACT541 instead.
>
> The 74HCT part has a 7.8 mA current sink capability which is
> insufficient for the 16 mA required by our drives. The 74ACT series
> has well over +/-24 mA output drive. Same pinout, same 1.5V
> threshold, same package. It also makes a dandy 3.3V to 5V level
> shifter to take care of those pesky new parallel port 3.3V signals.
>
> Mariss
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, <james_cullins@s...> wrote:
> > INDECO
> > On the sound Logic board the Led has a separate driver (
> uln2803 ) from
> > the signal (74hct541 ). The LED can work and the signal not work,
> so you
> > need to check on the DIR terminal pin and determine if it is
> changing form
> > 5v to 0.
> > If not please let Bob or me know and we will replace it for you.
> > Jim Cullins
> > Sound Logic
> >
> >
> > ----- Original Message -----
> > From: "Jon Elson" <elson@p...>
> > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > Sent: Friday, March 12, 2004 12:31 PM
> > Subject: Re: [CAD_CAM_EDM_DRO] Re: Servo only moving one way
> >
> >
> > >
> > >
> > > jmkasunich wrote:
> > >
> > > >--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...>
> wrote:
> > > >
> > > >
> > > >>INDECO wrote:
> > > >>
> > > >>
> > > >>
> > > >>> Yes I am using Gecko drives with Bob Campbells Breakout
> > > >>>board and Mach 2 software.
> > > >>>I have niether a logic probe or a oscilloscope to check it.
> > > >>>However the direction light on the board is not lit up as
> > > >>>the Y axis is, however the light on the Y only lights when
> > > >>>I jog to the left then goes out when I jog right. Is this
> > > >>>right?
> > > >>>
> > > >>>
> > > >>>
> > > >>That's the way it is SUPPOSED to work.
> > > >>
> > > >>
> > > >
> > > >The "Y" axis is acting the way it's supposed to. But nowhere
> > > >does he say that "X" is doing the same thing as Y,
> > > >
> > > Yes, I meant that the Y behavior was entirely normal, and the lack
> > > of a light on X was definitely related.
> > >
> > > > in fact he
> > > >says "the direction light on the board is not lit up as the
> > > >Y axis is", so that implies that the X light is _not_ working.
> > > >He previously stated that the problem axis is X, so the dark
> > > >LED points to a computer/parport/cable issue, NOT a drive
> > > >issue.
> > > >
> > > >
> > > Maybe. If the X LED is in SERIES with the LED in the driver's
> > > optocoupler, then a problem with wiring or the driver could cause
> the
> > > LED on the breakout board to not work.
> > >
> > > Jon
> > >
> > >
> > >
> > > Addresses:
> > > FAQ: http://www.ktmarketing.com/faq.html
> > > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > > Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> > >
> > > Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> > > Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> > > List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com,
> wanliker@a...,
> > timg@k...
> > > Moderator: pentam@c... indigo_red@q... davemucha@j...
> > [Moderators]
> > > URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> > >
> > > OFF Topic POSTS: General Machining
> > > If you wish to post on unlimited OT subjects goto:
> > aol://5863:126/rec.crafts.metalworking or go thru Google.com to
> reach it if
> > you have trouble.
> > > http://www.metalworking.com/news_servers.html
> > >
> > > http://groups.yahoo.com/group/jobshophomeshop I consider this
> to be a
> > sister site to the CCED group, as many of the same members are
> there, for OT
> > subjects, that are not allowed on the CCED list.
> > >
> > > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY
> POSTING THEM.
> > DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> > > bill
> > > List Mom
> > > List Owner
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
timg@...
> Moderator: pentam@... indigo_red@... davemucha@...
[Moderators]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
> Yahoo! Groups Links
>
>
>
>