Re: lost steps

Hi Colin.
It seems to me that you are having the same problem as others and
I. That the geckos will skip a step on continuos contouring reversal
moves. Imagine the z axis going over a pump, it has to go up and down
without stopping, This kind of move will lose one step every time.
And i am using Flashcut .
The easiest way to check if this is the case is to run a 2d square ,
run this a couple of times and if you do not see any step lose
continue to step 2. Run another square but one side of the square put
an arc, run this test atleast 10 times and if i am correct you should
see an error on the axis that is doing the reversal. This did not
happen when i was using cncpro. It seems that not all software and
drivers like to be pals . Its like those gorillas that they put
together to mate, one may think that the other one is ugly.
Just a thought.
Richard





You wrote
--- 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
> > >
> > >
> > >
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