Topics

1

G-Code, CAD, and CAM discussions / CNC Router Stuttering

« on: October 05, 2023, 01:59:32 AM »

Newbie question.
My Router stutters - doesn't run smoothly.
Motor tuning all 3 X,Y & Z axis have Velocity 3000 & Acceleration 200 set.
I'll attach a program that stutters.

2

FAQs / Incomplete steps

« on: April 13, 2012, 05:12:22 AM »

I've been using my CNC router for a few years successfully now and have just replaced chains driving X and Y with ballscrews. I now have A Slaved to X with 2 motors & 2 ballscrews driving the X axis and another ballscrew driving Y.
It seems to function reasonably OK
EXCEPT
that when I crank the feed speed up rather than completing one line of G code before starting the next line it commences the following line early.
So for instance - where previously 3 lines of code gave me a straight cut in the Y direction followed by a CCW quarter arc and a straight cut in the X direction - but now before the first straight cut is completed the CCW arc starts (early) before the second cut in the X direction commences. I end up with an ugly big eliptical curve where there should be a neat little arc in the corner.
What's going on ?

3

G-Code, CAD, and CAM discussions / Cutter Compensation code

« on: August 15, 2007, 08:23:29 PM »

Can somebody please tell me how to write the code to allow me to use a different cutter on my CNC router table programme so I can use  a 3mm cutter on a programme written for a 5mm cutter. The manual says G42/G43 but I don't know how to use it.
I've listed the 3mm cutter on my Tool Table as Diameter -2mm because the G Code was written on Sheetcam for a 5mm cutter & Mach3 shows the tool for the 5mm cutter as T1 Diameter 0. Is this correct ?
I've written G42 T2 (I've tried it everywhere between line 9 & 15). I've also tried G42 X-2.0 Y-2.0 & a few other codes but Mach3 still runs the cuts for the 5mm cutter.
In the code below what would I write to change the toolpath for the smaller cutter please ?
Is there a setting somewhere I also need to change ? Please keep as simple as possibe because I am (as simple as possible).

N0000 (Combined L & R Fig12 Targets with offset shift)
N0010 (Post processor: Mach2.post)
N0020 (Date: 20/04/2007)
N0030 G21 (Units: Metric)
N0040 G40 G90
N0050 F1
N0060 (Part: ~$Fig12RHmod001)
N0070 (Process: Outside offset 0, Mill/Router, 5 mm diameter, 5 mm Deep)
N0090 M06 T1  (Mill/Router, 5 mm diameter)
N0120 M03 S500
N0125 G00 Z40
N0130 X-325.5000 Y231.0000
N0150 G00 Z0.0000
N0160 Z-15.0000
N0170 G01 X122.0979 F1500 etc etc . . .

4

General Mach Discussion / Cutter Compensation - Help please

« on: August 13, 2007, 10:51:18 PM »

I am successfully using the Gcodes below on my router table with a 5mm router (T1) which is shown as Diameter 0 (I think) in Mach3. The tool dia was entered in Sheetcam when writing the G Codes which have been tacked together using Temp Offset to write this 2 part code.
I would like to change to a 3mm cutter. I have added T2 to my Tool Table as Diameter -2.
When I try to add a line "G41 T2" anywhere I get the error "Cannot change axis offsets with cutter radius comp on line . . ."

Please Help.

N0000 (Combined L & R Fig12 Targets with offset shift)
N0010 (Post processor: Mach2.post)
N0020 (Date: 20/04/2007)
N0030 G21 (Units: Metric)
N0040 G40 G90
N0050 F1
N0060 (Part: ~$Fig12RHmod001)
N0070 (Process: Outside offset 0, Mill/Router, 5 mm diameter, 5 mm Deep)
N0090 M06 T1  (Mill/Router, 5 mm diameter)
N0120 M03 S500
N0125 G00 Z40
N0130 X-325.5000 Y231.0000
N0150 G00 Z0.0000
N0160 Z-15.0000
N0170 G01 X122.0979 F1500
N0180 G02 X125.9975 Y229.9065 I0.0000 J-7.5000
N0190 G01 X329.3996 Y106.0965
N0200 G02 X333.0000 Y99.6900 I-3.8996 J-6.4065
N0210 G01 Y-99.6900
N0220 G02 X329.3996 Y-106.0965 I-7.5000 J0.0000
N0230 G01 X125.9975 Y-229.9065
N0240 G02 X122.0979 Y-231.0000 I-3.8996 J6.4065
N0250 G01 X-325.5000 Y-231.0000
N0260 G02 X-331.0000 Y-223.5000 I0.0000 J7.5000
N0265 G01 Y-216 Z0.0
N0270 G01 Y-137.0000
N0280 G02 X-323.5000 Y-129.5000 I7.5000 J0.0000
N0290 G01 X-265.5000
N0300 G03 X-265.5000 Y-124.5000 I0.0000 J2.5000
N0310 G01 X-323.5000
N0320 G02 X-331.0000 Y-117.0000 I0.0000 J7.5000
N0330 G01 Y-73.5000
N0340 G02 X-323.5000 Y-66.0000 I7.5000 J0.0000
N0350 G01 X-283.5000
N0360 G03 X-283.5000 Y-61.0000 I0.0000 J2.5000
N0370 G01 X-323.5000
N0380 G02 X-331.0000 Y-53.5000 I0.0000 J7.5000
N0390 G01 Y53.5000
N0400 G02 X-323.5000 Y61.0000 I7.5000 J0.0000
N0410 G01 X-283.5000
N0420 G03 X-283.5000 Y66.0000 I0.0000 J2.5000
N0430 G01 X-323.5000
N0440 G02 X-331.0000 Y73.5000 I0.0000 J7.5000
N0450 G01 Y117.0000
N0460 G02 X-323.5000 Y124.5000 I7.5000 J0.0000
N0470 G01 X-265.5000
N0480 G03 X-265.5000 Y129.5000 I0.0000 J2.5000
N0490 G01 X-323.5000
N0500 G02 X-331.0000 Y137.0000 I0.0000 J7.5000
N0550 G01 Y216
N0510 G01 Y223.5000 Z-15.00
N0520 G02 X-323.5000 Y231.0000 I7.5000 J0.0000
N0530 G00 X-323.5 Y231.0 Z0.0

N0540 G52 X-683 Y0.00 (Set Temp Offset)

N0000 (Filename: ~$Fig12LHmod008.tap)
N0010 (Post processor: Mach2.post)
N0020 (Date: 19/04/2007)
N0030 G21 (Units: Metric)
N0040 G40 G90
N0050 F1
N0070 (Process: Outside offset 0, Mill/Router, 5 mm diameter, 5 mm Deep)
N0090 M06 T1  (Mill/Router, 5 mm diameter)
N0130 X333.0000 Y223.5000
N0150 G01 Z-10.00 F1500
N0160 Z-15.0000
N0170 G03 X325.5000 Y231.0000 I-7.5000 J0.0000
N0180 G01 X-122.0979
N0190 G03 X-125.9975 Y229.9065 I0.0000 J-7.5000
N0200 G01 X-329.3996 Y106.0965
N0210 G03 X-333.0000 Y99.6900 I3.8996 J-6.4065
N0220 G01 Y-99.6900
N0230 G03 X-329.3996 Y-106.0965 I7.5000 J0.0000
N0240 G01 X-125.9975 Y-229.9065
N0250 G03 X-122.0979 Y-231.0000 I3.8996 J6.4065
N0260 G01 X325.5000 Y-231.0000
N0270 G03 X333.0000 Y-223.5000 I0.0000 J7.5000
N0275 G01 Y-216 Z0.0
N0280 G01 Y-137.0000 F1500
N0290 G03 X325.5000 Y-129.5000 I-7.5000 J0.0000 F1000
N0300 G01 X267.5000
N0310 G02 X267.5000 Y-124.5000 I0.0000 J2.5000
N0320 G01 X325.5000
N0330 G03 X333.0000 Y-117.0000 I0.0000 J7.5000
N0340 G01 Y-73.5000
N0350 G03 X325.5000 Y-66.0000 I-7.5000 J0.0000
N0360 G01 X285.5000
N0370 G02 X285.5000 Y-61.0000 I0.0000 J2.5000
N0380 G01 X325.5000
N0390 G03 X333.0000 Y-53.5000 I0.0000 J7.5000
N0400 G01 Y53.5000
N0410 G03 X325.5000 Y61.0000 I-7.5000 J0.0000
N0420 G01 X285.5000
N0430 G02 X285.5000 Y66.0000 I0.0000 J2.5000
N0440 G01 X325.5000
N0450 G03 X333.0000 Y73.5000 I0.0000 J7.5000
N0460 G01 Y117.0000
N0470 G03 X325.5000 Y124.5000 I-7.5000 J0.0000
N0480 G01 X267.5000
N0490 G02 X267.5000 Y129.5000 I0.0000 J2.5000
N0500 G01 X325.5000
N0510 G03 X333.0000 Y137.0000 I0.0000 J7.5000
N0515 G01 Y216
N0520 G01 Y225.5000 Z-15
N0530 G00 Z25.0000
N0540 M05


G52 X0 Y0 Z0 (Cancel Offset Shift)
N0580 Y460
N0590 X390
M30

5

G-Code, CAD, and CAM discussions / subroutine

« on: March 09, 2007, 06:43:32 PM »

OK, so you're about to discover how new I am. Can someone please direct me to where I can learn to convert a 26 line G-code I've written into a subroutine, how to call it up & start it in 14 different start positions on my Router table please & do I just write the G-code for the new start position after the end of each subroutine code followed by the subroutine code again ? I've found the section on subroutines in the manual but not the description for dummies like me on how to write it.
Keep it simple please as I'm not very bright.

6

General Mach Discussion / Download

« on: March 06, 2007, 03:05:29 AM »

I'm about to buy Mach3. How many times do I have to purchase Mach3 & Conversational Wizards to be able to use them on my dedicated PC, in my office & at home on another PC (3 locations in all) ?