Re: EMC error

What I am trying to do here is set a global feedrate for all the tool
moves.
See various comments below.

--- In CAD_CAM_EDM_DRO@y..., "Raymond Heckert" <jnr@a...> wrote:
> Assuming you're programming for a Mill or Router, perhaps you're
using
> a tool with a diameter of less than 3/16" (0.094" radius). The G41
in


The "tool" in this case is a Bic pen held over an XY table.


> line N21 generates a tool offset, and most systems need at least the
> tool radius to accomplish this. The linear move for the G41 in line
N14
> is 0.3094" (due to X & Y components), but line N21, there is only a
Y
> component, of 0.0916". It may be doing a 'look-ahead', and seeing
> trouble at line N21, and stops you at line N20. By the way, you move
> the Z axis to 0.0 in line N13, and never retract it for the G00
> moves... BAD practice.

Exactly why I am trying to learn it with a Bic pen before I goob up
my milling machine.



Also, why G0 in line N13, and G00 in line N14?


The G0 was added by hand on a suggestion by Mr. Smith. I really
didnt think too much about it, just wanted to try something quick
(you know how impatient us young whippershappers get). I am happy to
have verified my process from one end to the other; that is: .DXF
into VectorCAM, VectorCAM to G-code, G-code to EMC, EMC to XYtable.
Now that I have all that working, its all downhill.


> Also, you don't have a Txx M06 line to specify a tool dia. offset.
Or
> are you using a demo copy of VECTOR? Word has it that some demo
> programs only run a few lines, then stop.


Yes it is a demo copy, but I managed to run a more complicated
program with no problem. As mentioned above, now that my process is
verified I am going to "do the right thing" and study the G-codes
thorougly until I know it all. I'm happy that I have a platform to
experiment with. Thanks for your input.


>
> RayHex
>
> ----------
> > From: reed_irion <Reed_Irion@h...>
> > To: CAD_CAM_EDM_DRO@y...
> > Subject: [CAD_CAM_EDM_DRO] EMC error
> > Date: Monday, June 03, 2002 8:00 PM
> >
> > So here is my G-code, it's just a few shapes:
> >
> > N10 (PROGRAM GENERATED BY VECTOR)
> > N11 G90 G40 G20 G17
> > N12 G49 G54
> > N13 G0 X0.0 F4.0
> > N13 G00 X0.517 Y0.1405 Z0.
> > N14 G41 G01 X0.2991 Y-0.079
> > N15 X0. Y0.
> > N16 X-0.0811 Y0.2985
> > N17 X0.1368 Y0.518
> > N18 X0.4359 Y0.439
> > N19 G40 X0.517 Y0.1405
> > N20 G00 X0.4705 Y0.4084
> > N21 G41 G01 Y-0.0916
> > N22 X0.9705
> > N23 Y0.4084
> > N24 G40 X0.4705
> > N25 G00 X0.6863 Y-0.3279
> > N26 G41 G01 X1.0588 Y0.2195
> > N27 X1.5384 Y-0.2658
> > N28 G40 X0.6863 Y-0.3279
> > N29 G00 X1.7418 Y0.2195
> > N30 G03 X1.7418 Y0.2195 I-0.3162 J0.
> > N31 M30
> >
> >
> > When it gets to line N20 I get Error:axis 1 following error.
> >
> > I generated the code in vectorCAM. What gives ?
> >