so to draw fly larger drawings ??

I sorry to say that i am having trouble understanding you too.

But from the little i picked up, i think your problem is compensating for the diameter of your tool.

Say you cut a 100mm x 100mm square and your gcode looks something like this.

F300
G01 X100
G01 Y100
G01 X0
G01 Y0

This will move the center of your cutting tool drawing a 100mm square.
Now if your tool measures... say 10mm in diameter... well your 100mm square will become a 90mm square.

You need to compensate for the tool diameter in your gcode. if you are writing your gcode by hand, then compensate by hand, otherwise any descent CAM software will do it for you.

Hope this is what you are meaning.
Regards
Fernando

this is my g - cod and it wants to get in centre unit

N0005 G90
N0010 G21
N0015 G00 Z25.00
N0020 G00 X109.575 Y7.650
N0025 G01 Z-0.10
N0030 G01 X109.575 Y53.100
N0035 G01 X109.575 Y53.100
N0040 G01 X129.275 Y53.100
N0045 G01 X128.100 Y68.100
N0050 G01 X126.425 Y82.425
N0055 G01 X123.100 Y93.100
N0060 G01 X118.100 Y108.100
N0065 G01 X106.425 Y128.100
N0070 G01 X96.425 Y139.750
N0075 G01 X83.100 Y148.100
N0080 G01 X68.100 Y154.750
N0085 G01 X53.100 Y156.425
N0090 G01 X30.800 Y157.650
N0095 G01 X4.275 Y157.650
N0100 G01 X4.275 Y80.375
N0105 G01 X14.900 Y80.375
N0110 G01 X14.900 Y7.650
N0115 G01 X109.575 Y7.650
N0120 G00 Z25.00
N0125 G00 X109.575 Y7.650
N0130 G01 Z-0.10
N0135 G01 X109.575 Y53.100
N0140 G01 X109.575 Y53.100
N0145 G01 X129.275 Y53.100
N0150 G01 X128.100 Y68.100
N0155 G01 X126.425 Y82.425
N0160 G01 X123.100 Y93.100
N0165 G01 X118.100 Y108.100
N0170 G01 X106.425 Y128.100
N0175 G01 X96.425 Y139.750
N0180 G01 X83.100 Y148.100
N0185 G01 X68.100 Y154.750
N0190 G01 X53.100 Y156.425
N0195 G01 X30.800 Y157.650
N0200 G01 X4.275 Y157.650
N0205 G01 X4.275 Y80.375
N0210 G01 X14.900 Y80.375
N0215 G01 X14.900 Y7.650
N0220 G01 X109.575 Y7.650
N0225 G00 Z25.00
N0230 G00 X109.575 Y7.650
N0235 G01 Z-0.10
N0240 G01 X109.575 Y53.100
N0245 G01 X109.575 Y53.100
N0250 G01 X129.275 Y53.100
N0255 G01 X128.100 Y68.100
N0260 G01 X126.425 Y82.425
N0265 G01 X123.100 Y93.100
N0270 G01 X118.100 Y108.100
N0275 G01 X106.425 Y128.100
N0280 G01 X96.425 Y139.750
N0285 G01 X83.100 Y148.100
N0290 G01 X68.100 Y154.750
N0295 G01 X53.100 Y156.425
N0300 G01 X30.800 Y157.650
N0305 G01 X4.275 Y157.650
N0310 G01 X4.275 Y80.375
N0315 G01 X14.900 Y80.375
N0320 G01 X14.900 Y7.650
N0325 G01 X109.575 Y7.650
N0330 G00 Z25.00
N0335 G00 X109.575 Y7.650
N0340 G01 Z-0.10
N0345 G01 X109.575 Y53.100
N0350 G01 X109.575 Y53.100
N0355 G01 X129.275 Y53.100
N0360 G01 X128.100 Y68.100
N0365 G01 X126.425 Y82.425
N0370 G01 X123.100 Y93.100
N0375 G01 X118.100 Y108.100
N0380 G01 X106.425 Y128.100
N0385 G01 X96.425 Y139.750
N0390 G01 X83.100 Y148.100
N0395 G01 X68.100 Y154.750
N0400 G01 X53.100 Y156.425
N0405 G01 X30.800 Y157.650
N0410 G01 X4.275 Y157.650
N0415 G01 X4.275 Y80.375
N0420 G01 X14.900 Y80.375
N0425 G01 X14.900 Y7.650
N0430 G01 X109.575 Y7.650
N0435 G00 Z25.00
N0440 G00 X109.575 Y7.650
N0445 G01 Z-0.10
N0450 G01 X109.575 Y53.100
N0455 G01 X109.575 Y53.100
N0460 G01 X129.275 Y53.100
N0465 G01 X128.100 Y68.100
N0470 G01 X126.425 Y82.425
N0475 G01 X123.100 Y93.100
N0480 G01 X118.100 Y108.100
N0485 G01 X106.425 Y128.100
N0490 G01 X96.425 Y139.750
N0495 G01 X83.100 Y148.100
N0500 G01 X68.100 Y154.750
N0505 G01 X53.100 Y156.425
N0510 G01 X30.800 Y157.650
N0515 G01 X4.275 Y157.650
N0520 G01 X4.275 Y80.375
N0525 G01 X14.900 Y80.375
N0530 G01 X14.900 Y7.650
N0535 G01 X109.575 Y7.650
N0540 G00 Z25.00
N0545 G00 X109.575 Y7.650
N0550 G01 Z-0.10
N0555 G01 X109.575 Y53.100
N0560 G01 X109.575 Y53.100
N0565 G01 X129.275 Y53.100
N0570 G01 X128.100 Y68.100
N0575 G01 X126.425 Y82.425
N0580 G01 X123.100 Y93.100
N0585 G01 X118.100 Y108.100
N0590 G01 X106.425 Y128.100
N0595 G01 X96.425 Y139.750
N0600 G01 X83.100 Y148.100
N0605 G01 X68.100 Y154.750
N0610 G01 X53.100 Y156.425
N0615 G01 X30.800 Y157.650
N0620 G01 X4.275 Y157.650
N0625 G01 X4.275 Y80.375
N0630 G01 X14.900 Y80.375
N0635 G01 X14.900 Y7.650
N0640 G01 X109.575 Y7.650
N0645 G00 Z25.00
N0650 G00 X0 Y0
N0655 M30

Im sorry then,
I cant understand...

my to be low - cut not after G40 only external contour

Hi! My name is Julio and I've adopted my late father's nickname: "Don Faso" . He was a humble man with a big, noble heart and appreciated by everybody all over the city. In Puerto Rico where I come from, as well as in other Hispanic countries, the title "Don" is for a very respectable mature person of any social class. We don't follow the Italian meaning of it. I am disabled with traumatic brain injury after being a teacher in P. R. and the U.S. for 18 years. I am barely starting with CNC and it's an uphill battle for me because of my limitations. I am commited to doing it to help the family's budget and help me build an R/C flying model in foam of a circular wing airplane I want to test and patent. I need help understanding what the Machsupport website says that for Mach 3 to be supported in a laptop with a parrallel port (that's all I have and can afford) it has to use one of the external controllers in their PLUGINS section. If that's the case, which is the best controller for a Dell Latitude D630? I'll appreciate your help so very much!!!

Don, you may get away with using the laptop with the parallel port, some work some dont, try it and see. Not sure on the specs of that laptop you have though, if its under a 1Gig processor you may struggle.
 I personally would recomend the SmoothStepper if you decide to go the external hardware route but again there is no 100% guarantee your laptop will work but I have not heard of one so far that doesnt work with the SmoothStepper.

Hood

Hood,
Attached is a dxf and screen shot of djjaroo's gCode he posted.
Should be of help in the communications.
RICH

djjroo,
Are you trying to cut an outside contour of what is pictured?

Thank you, Hood! I'm certainly going to look into that!