Re: lost steps

Colin,

Invert your step pulse polarity in software. Probably both step and
direction are changing simultaneously on the falling (active step
pulse edge for the G201).

Mariss

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "cdoughtynz <cdoughty@p...>"
<cdoughty@p...> wrote:

> The software I am using is Lcam and the 0.25mm diameter is the

offset

> required to get a 5 mm hole using a 3/16" cutter.
> the software has been checked out with a Larken board and that does
> not lose a single step.
> I have 2 machines one with larken drivers and one with Gecko's,

both

> using the same software. one loses steps and the other doesn't.
> has anyone else had this problem?
>
> Colin
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "j.guenther"
> <j.guenther@v...> wrote:
> > Are you sure it is losing steps or is what you are seeing the
> result of
> > resolution of your stepper motors / lead screw / drive coupling?
> Seems to
> > me that you would not get truly round holes with anything less

than

> > microstepping drivers, hi reduction drive coupling and high TPI
> lead screws
> > when routing .25mm diameter holes using any stepper drivers.
> That's a hole
> > of 0.00984251968504 diameter, IMHO you should be drilling these,
> not routing
> > them.
> >
> > John Guenther
> > 'Ye Olde Pen Maker'
> > Sterling, Virginia
> >
> > > -----Original Message-----
> > > From: cdoughtynz <cdoughty@p...>
> > > [mailto:cdoughty@p...]
> > > Sent: Friday, January 10, 2003 12:18 PM
> > > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > > Subject: [CAD_CAM_EDM_DRO] lost steps
> > >
> > >
> > > Hi All,
> > >
> > > I am losing steps routing small holes (0.25mm diameter) using
> Gecko
> > > drivers G201a, and it doesn't mater if I go fast or slow. Has
> anyone
> > > experienced this and if so what is the remedy.
> > >
> > > Regards
> > > Colin
> > >
> > >
> > >
> > > 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...

> > > Moderator: jmelson@a... timg@k... [Moderator]
> > > 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
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
> > >