Messages

1741

General Mach Discussion / Re: Feed Rate

« on: February 09, 2008, 03:46:10 PM »

It also depends on weather this is a mill or a lathe, if its a lathe F1 can be F1 per rev or F1 per minute, mills are normally F1 per minute.

Graham.

1742

General Mach Discussion / z starts down but x and y are already moving

« on: January 31, 2008, 02:31:35 PM »

No, just every time you want the feed to change.

Graham.

1743

General Mach Discussion / Re: ATC using stepper motor on A axis

« on: January 31, 2008, 11:49:44 AM »

Here is one I did for Chris (guynamedbathgate) it is a lock to pawl type changer but the code will work with a few mods.

Graham.

1744

General Mach Discussion / Re: Turn?

« on: January 31, 2008, 09:47:43 AM »

Here is one type, they all do them if you ask.

Graham.

1745

General Mach Discussion / Re: Turn?

« on: January 31, 2008, 09:09:12 AM »

Why do you all use the tail stock for drilling?

If you have a quick change tool post why not use the Morse taper holder and drill with the Z axis or mount drills etc. in square shank holders on the tool post.

Graham.

1746

General Mach Discussion / Re: Turn?

« on: January 30, 2008, 06:32:17 PM »

X is the cross slide, Z is the carriage.

you can set up more axis to do other things, many use Y as a vertical slide for milling and A axis for tool changers.

Graham.

1747

General Mach Discussion / Re: What causes this?... circle interpolation perhaps?

« on: January 28, 2008, 12:10:10 PM »

Hi Neil,

What did you use to create the shape?

post the g-code that did this, and some sizes of the part

Graham.

1748

General Mach Discussion / Re: steps per 360 degree revolution.

« on: January 21, 2008, 05:25:42 PM »

That's not on, all my craps on here 

Graham.

1749

General Mach Discussion / Re: Constant Surface Speed.

« on: January 19, 2008, 03:57:48 PM »

Hi Jim,

its all in there just waiting for you to tell it when to move.

Try this code :-

Zero out at some point in fresh air.

G21 (Metric)
G40 (Clear offsets)
G95 (Set feed per rev)
G00 X50. Z0 (Move to start point)
G96 S75 M3 (CSS 75 Metres/min)
G01 X10. F.1 (Feed at .1/rev)
G00 X50. Z1. (Rapid clear)
M30 (End)

Graham.

1750

General Mach Discussion / Re: CSS question

« on: January 19, 2008, 03:39:08 PM »

Hi Terry,

G96 turns CSS on

G97 turns CSS off

G94 feed per min

G95 feed per rev

G96 uses metres or feet/min, but you also have to be in feed per rev (G95) and have spindle feed back for it to work. Feed and speed change relative to the dia been cut.

G97 is a fixed speed

As far as I know there is no G48 command, ISO g-code uses G50 Snnnn to set maximum speed, Mach3 uses G50 for scaling.  It is one thing that has been asked for but lathe always get put on the back burner, don't hold your breath.

CSS

G21 G95 (Metric feed/rev)
G96 S100 M3 (CSS at 100 metres / min)

None CSS with spindle feed back (RPM)

G21 G95 (Metric feed/rev)
G97 S1000 M3 (set to 1000 rpm)

None CSS no spindle feed back (RPM)

G21 G94 (Metric feed/min)
G97 S1000 M3 (set to 1000 rpm)

Graham.