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Messages - Graham Waterworth

2651
Hi Benny,

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

Thanks

Graham.

2652
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

2653
Something I would find very useful would be a multi line MDI screen.

Thanks

Graham

2654
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.


2655
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.

2656
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.

2657
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

2658
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