Messages

5891

General Mach Discussion / Re: After using the “Steps Per Unit” in “Axis Calibration” my CNC wont run properly

« on: September 02, 2008, 09:37:45 PM »

When I moved from full to 1/8 step I could no longer run the Y axis at 100 had to drop to I think 60.  Why would that be?

Because Mach3 can't output steps fast enough, unless you change to a faster kernel speed.

5892

VB and the development of wizards / Re: VB macro help (non cnc)

« on: September 02, 2008, 07:14:35 PM »

What software are you using this in?

5893

General Mach Discussion / Re: BobCAM generating unusable g code...

« on: August 24, 2008, 07:09:07 PM »

This is with a 1/4" bit


M3
G0 Z0.1250
G0 X11.7500 Y11.7500 Z0.1250
F50
G83 X11.7500 Y11.7500 Z-0.4950 R0.0313 Q0.2475
G0 X11.7500 Y11.7500 Z0.1250
G0 X11.7500 Y22.8750 Z0.1250
G1 X11.7500 Y22.8750 Z0.0000 F50
G3 X11.7500 Y22.8750 Z-0.2475 I0.0000 J-11.1250 F150
G3 X11.7500 Y22.8750 Z-0.4950 I0.0000 J-11.1250
G3 X11.7500 Y22.8750 Z-0.4950 I0.0000 J-11.1250
G0 X11.7500 Y22.8750 Z0.1250
G0 X0 Y0
M5
M30

5894

General Mach Discussion / Re: BobCAM generating unusable g code...

« on: August 24, 2008, 03:19:07 PM »

Don't use BobCAD, but you probably  need to edit your post or use a different one. Try removing the G28 and see if it works.

5895

General Mach Discussion / Re: To many Nodes?

« on: August 23, 2008, 09:00:03 AM »

Jim,
 if you use a CAM programme it will arc round your sharp corners at the radius of the tool thus preventing the CV problems and giving you a beautifully sharp corner

G41/G42 will do the same thing. Give you a toolpath with a radius corner that cuts a square corner.

5896

Mach Screens / Re: Mist On / Off LED

« on: August 23, 2008, 08:48:16 AM »

Do you have an output set up for mist? You need to configure an output pin, and assign it to mist on the spindle tab of the ports and pins screen.

5897

G-Code, CAD, and CAM discussions / Re: can someone tell what the letter H and D stand for

« on: August 22, 2008, 08:12:36 PM »

Change G41 D0 to D1 for tool 1, if that's what you're using. Then change the size of tool 1 in the tool table. Make the tool .010 smaller.

With G41/G42, if you want to specify the tool size instead of the tool #, use P instead of D. P is the tool radius, so for a .25 tool you'd use G41 P0.125.

5898

G-Code, CAD, and CAM discussions / Re: can someone tell what the letter H and D stand for

« on: August 22, 2008, 01:35:12 PM »

Never used it, but I believe H is the tool # as well, used for height offsets.

5899

General Mach Discussion / Re: closing the loop in mach?

« on: August 22, 2008, 11:20:52 AM »

But even then, I can still miss steps. 
DingbatCA

Yeah, you can still lose steps if your motors are too small, or you try to run them to fast, just as Kibble said. There are other reasons as well, but none of them can be fixed by a closed loop system. Get some good drives, and a properly designed motion system (motor, screws, gearing), and you should never lose steps if you run the machine as it was designed to run.

The CNC Brain seems to be promising the world, but until we can actually see what it can do, I'm still a bit skeptical.

5900

G-Code, CAD, and CAM discussions / Re: can someone tell what the letter H and D stand for

« on: August 22, 2008, 06:17:27 AM »

D is the tool # when using G41/G42