Re: running emc in mm units

Thanks Ray
I did exactly as you told and it worked without
requiring me to retune any axis
thanks and best regards
babar

--- Ray Henry <rehenry@...> wrote:

>
>
> Babar
>
> I'm happy to hear that you are out of jail on "work
> release." <g>
>
> I don't have much experience with mm but I would
> think that you could
> leave the machine's definition in inches but start
> it up with mm as the
> default unit for work by editing/adding a line in
> the ini for mm.
>
> ; General section
>

-------------------------------------------------------------

> [EMC]
> ..
> ; Startup codes for RS-274-NGC interpreter
> RS274NGC_STARTUP_CODE = G21
>
> That should then tell it to read things like the var
> and tool file in mm
> rather than inches and use mm when reset.
>
> Now select mm as the default display by setting the
> ini lines as follows
>
> ; Units for display, default would be AUTO
> ; LINEAR_UNITS = AUTO
> ; LINEAR_UNITS = INCH
> LINEAR_UNITS = MM
> ; LINEAR_UNITS = CM
> ANGULAR_UNITS = AUTO
> ; ANGULAR_UNITS = DEG
> ; ANGULAR_UNITS = RAD
> ; ANGULAR_UNITS = GRAD
>
> Now whenever you write a program, it would be very
> wise to include a G21
> near the top of the program to remind the
> interpreter that this is mm
> stuff.
>
> You could also change the default display size in
> tkbackplot if you dig
> into that code a bit in
> plat/nonrealtime/bin/tkbackplot. About line 65
> is the following.
>
> # This variable sets the default size of the plot
> and can be thought of
> as number of
> # pixels per inch of machine motion. The default
> (40) will give about
> 55 screen
> # inch per inch moved.
>
> set size 40
>
> You could change 40 to 1, 2, or 3 depending upon the
> size of the parts
> that you are making. This edit works immediately
> and requires no compile
> or make or anything like that.
>
> Hope this helps.
>
> Ray
>
>
>
>
> On Wednesday 18 December 2002 10:49 am, you wrote:
> > Hi forum
> >
> > Its been over a week after i got released from the
> > Jail (Counter Stucking problem) :-)
> > I have tuned all the three axis so far and my
> milling
> > machine
> > is running in manual, auto and mdi modes in inches
> > units.
> > I want to run it now in mm units since in my
> country
> > most people work
> > in mm than in inches.
> >
> > The variable "LINEAR_UNITS" is found in [TRAJ]
> section
> > the other
> > three "UNITS" variables are found in [AXIS_X]
> > sections.
> >
> > I had set the LINEAR_UNITS found in TRAJ section
> to
> > 1.0 so that
> > i can run my machine in milimeters. But it doesnot
> > works.
> > Instead it disturbs the scaling of my machine.
> >
> > Can EMC work both in MM and inches just by
> selecting
> > the units
> > from the menu bar? or do we need separate ini
> files
> > for
> > running emc in inches and milimeters?
> >
> > I am very happy since my axis are tuned after
> spending
> > lot of
> > my time playing with P,I,D and Velocity Feed
> Forward
> > gain.
> > Will I have to retune all these variables if i
> > configure emc
> > to work in mm??
> >
> > Please write some words about running the EMC in
> > milimeters
> > and inches.
> >
> > Thanks and best regards.
> > Babar
> >
> >
> >
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