Hi guys,

Recently i've have to mill different sizes of eliptical holes, does anyone have a program, in heidenhain preferably, that only involves altering the length and width of the elipse. It would save me a bit of time and hassle loading from a computer into the machine each time!

Thanks for any help.

One of the members has shared a small program to do something similar.
Sorry don't recall the member or the specific title - but it was a followup in a thread, "Milling a Sphere", I believe - -- Hope that helps.
:cheers: Jim

I don't know if this will help... This is written for emc2

http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Oword#Sample_2_Subroutine_Sample_ellipse

sam

Some simple macro B stuff.
Remove the #104 line and the G68 and G69 lines if your control dones not do rotation.


G0X0Y0

#100=0.5(X RADIUS)
#101=2.0(Y RADIUS)
#102=1(ANGLE STEP)
#104=15.0(ROTATE PATTERN)
(****************)
#103=-1(COUNTER)
G68X0Y0R#104
G1G41X[#100*COS[#103]] Y[#101*SIN[#103]] D1 F10.0
WHILE [#103 LE 360] DO1
G1X[#100*COS[#103]] Y[#101*SIN[#103]] F10.0
#103=#103+#102
END1
G1G40X0Y0
G69

One of the members has shared a small program to do something similar.
Sorry don't recall the member or the specific title - but it was a followup in a thread, "Milling a Sphere", I believe - -- Hope that helps.
:cheers: Jim

Try this
http://www.cnczone.com/forums/showthread.php?p=411719#post411719

gallzer
I've altered the Ellipse program to produce Heidenhain code.
As I don't know this language, please check, and advise errors.

Kiwi - I am still looking to mill a rugby ball! Any luck on that code? Thanks for popping in - I forgot that you were the guy!
How could I do THAT?! Pretty ordinary - eh?
:cheers: Jim

Jim
I posted the program for a ellipsoid to the other thread just a few days ago.
http://www.cnczone.com/forums/showth...719#post411719
You are slipping in your old age ;-)

Quick way is to simply set the axis scaling (assuming you have that feature) of one axis to 200% and do a circle (G2/G3) - instant elipse!

Only problem with this is the cutter radius. If it's very fine cutter and/or you don't need absolute perfect accuracy, then it may not be a problem. CRC generally will stuff up when done like this, so if you use this method, probably best to use fine cutter and leave CRC off.

thanks for all the replies guys i'll have a go at andre bs program, but hopefully altering it to heidenhain. Kiwi your generator is great but i'd prefer to use the same program only having to alter the x and y dinensions.

Kiwi -- Thanks - Must be the thin air up here on the Hard Stand!
Jim
oops get a 404 - not found - I'll go looking - cheers

Jim...I get the same 404. The one in #5 is the same but does work.

Jim..I get the same 404. Try the link on #5 which works.

Sorry for duplication...I thought the previous post failed.

Found it via your sig to posts listing -- Thanks - That should be SweatAs"
:cheers: Jim

Gallzer
For those who know enough to write a macro is certainly a very practical solution.

Can someone confirm the Heidenhain code the program generates is the correct format.
I will modify the program if necessary so the program generates usable code.