Messages

2641

General Mach Discussion / Zero Return (Home Setting)

« on: January 08, 2006, 05:43:31 AM »

Hi All,

I have set up my lathe with home switches.  I am using servo motors with encoders and was wondering,

In Mach3 how is the home position determined?

Is it by sensing the home switch only or is it by sensing the switch and then looking for the zero mark on the encoder?

or is it done some other way?

Thanks

Graham.

2642

General Mach Discussion / Re: Who else should be added ? ( Freinds of Artsoft)

« on: December 20, 2005, 09:59:21 AM »

Hi Benny,

what do you class as the portal and where is it?

Thanks

Graham.

2643

General Mach Discussion / Re: Tool compensation

« on: December 18, 2005, 08:42:21 AM »

Hi

it sounds as if you have got G41 instead of G42 or vise versa.

Regards

Graham

2644

General Mach Discussion / Re: New forthcoming screen designer. ( Your input needed)

« on: December 16, 2005, 02:10:29 PM »

Something I would find very useful would be a multi line MDI screen.

Thanks

Graham

2645

General Mach Discussion / Re: Quantifying A-axis rotary

« on: December 16, 2005, 05:11:31 AM »

Hi Keith

the a axis indexer should be set up so that one full rev of the indexer is 360 degrees (0 to 359) that way all calculations for movement are decimal degrees.

what you have to watch out for is feed matching (G01) if you want to mill a slot at 45 degrees round a 1 " bar over a 90 degrees length round the bar the command G01 X19.95 A90. F100. would give a slot at 45 deg on a 1" dia bar.

WHAT! I here you cry.

If you take the top and bottom off a been can, then cut the tube down the length, opened it up and rolled it out flat the rectangle you are left with is the circumference of that dia can (less the cut width).

If you then draw a line on that rectangle at 45 degrees from the cut edge to 1/4 of the way up the length that is what you would get on a round bar of that diameter.

so a formula

bar dia 1"
45 degree slot running from right to left over 90 degrees

1"*25.4*PI  = 1*25.4*3.1415 = 79.7941

90 degrees is 1/4 rotation so 90/360 = .25

79.7941*.25 = 19.9485

So the X axis movement is 19.94mm

G00 X0 A0
Z1.
G01 Z-.2 F50.
G01 X-19.94 A90.
G00 Z25.

If the feeds are not matched then the slot will not be at 45 degrees.

I hope this helps

Graham.

2646

General Mach Discussion / Touch Screens

« on: December 12, 2005, 07:44:59 PM »

Hi All,

can anybody tell me if Mach3 is compatable with touch screens, the one I have is a 15" with the touch output on the RS232.

I know I am all questions at the moment but things will change.

Thanks

Graham.

2647

General Mach Discussion / help with wiring diagrams

« on: December 12, 2005, 06:42:56 PM »

Hi All,

is there a repository of standard/example wiring diagrams for limit switches, estop, MPG's with axis select switches etc.

It would make life a bit easier than reinventing the wheel.

Thanks

Graham.

2648

General Mach Discussion / MPG's wanted

« on: December 11, 2005, 06:43:00 AM »

Hi All,

I am a bit new to this CNC retrofitting lark, although I have been using and programming the full size stuff for 20 years.

I am in the process of converting my lathe (Warco 250) to CNC and want to fit MPG's, my question is what type to buy and where to get them. 

Thanks

Graham

2649

General Mach Discussion / Re: Bewildered and at wits end

« on: December 11, 2005, 05:49:59 AM »

Have you tried removing the G00 and replacing them with fast feeds, say 1/4 of your rapid speed, this will show you of you are getting skids.

Graham