Messages

1

G-Code, CAD, and CAM discussions / Re: Mill brake when micro machining PCB boards

« on: December 21, 2009, 10:52:46 AM »

I´m using a carbide Mill from PMT.
 
I´m using a  two flute micro/miniature endmills are designed for the machining of small electronic components and highly abrasive materials.

that information is in the personal page of PMT,the brand of my miils.

I think taking all the right steps.

Proper mill,proper machining condition,good fixation off the mill and the PCB board ,good refrigeration...................Missing something?

2

G-Code, CAD, and CAM discussions / Re: Mill brake when micro machining PCB boards

« on: December 21, 2009, 10:10:19 AM »

Even when i put an higher rotacion(30000 rpm),and lower feedrate(31 mm/mm) and deepht of cute (0.100mm), the mill(0,254mm) still brake.

I´m using the formulas and data from Gurhring and sandvik catologs to get this values.

N = (1000x Vc) / p x 0.254    adicional information Pi= 3,14 , Vc(for copper)= 27

F= N x Fz x Z ,                    adicional information    Fz=0,0005 ,  Z =2

I will apreciate any kind of help.

Thanks

3

G-Code, CAD, and CAM discussions / Mill brake when micro machining PCB boards

« on: December 21, 2009, 08:56:12 AM »

Good afternoon,i have a question.

I´m micromachining a a PCB board(copper material) ,i´m using a 0.254mm mill with 15000 rpm,and a 81mm/min feedrate,and taking 0.100mm per passage,however,the mill brake after a little while.
i´m consulting inumerus books off cnc machining ,and the values i use,aren´t too far diferent from the values from the books.

Does anybody have a sugestion?

Thanks

4

G-Code, CAD, and CAM discussions / Loose Parts of the program

« on: November 20, 2009, 01:31:52 PM »

Good Afteernon,i have a problem im my Minitech 3.

I´m working without the two limit switch in the x and Y axis.

But i´m working everyday with the machine,without any problem,but today i made a very simple program,and the machine skips the main program and just do the Subprogram.

I put others program(that were Good,because i tried in others days),and they also went wrong.The machine did the same,he skip the main program and just do the subprogram.

Can anybody tell me what i´m doing wrong?

5

LazyCam (Beta) / Re: How can I make the zero in lazy Cam

« on: November 12, 2009, 09:47:23 AM »

I don´t have the Lazycam Manual,i´ll see in the tutorials and in help topics.

I´m using Autocad2007,and i can´t open a DXF file created by a cnc desk.
But i open the file in the lazycam,but i can´t open in autocad 2007.

Thanks anyway for the help.

Can i see the tutorial´s  in the net?

6

LazyCam (Beta) / How can I make the zero in lazy Cam

« on: November 12, 2009, 08:11:39 AM »

How can I put the (o,o) in the origin in lazyCam?

In some cases,i  go to CaD files and put  Zero Piece in the origin,but some files i can´t open in cad,only in lazy cam.


Can someone please tell me,what i´m doing wrong?



One other question,i´m making offsets ,but in the lazycam Preview i get lot of lines,and i don´t know if is right or not:

7

G-Code, CAD, and CAM discussions / Re: Can´t call the subroutine twice

« on: November 05, 2009, 08:57:01 AM »

Thank you so much,to respond so quickly.

The program went ok.

Once more,thanks.

8

G-Code, CAD, and CAM discussions / Can´t call the subroutine twice

« on: November 05, 2009, 07:24:31 AM »

I already read your forum,but i still can´t resolve my problem.

I have good knowlege of cnc,but in minimach3 i can´t call the subroutine twice.

I´ll put the program here,i hope somebody give me a help.


N10 G0 Z2
N20 M3 S2000 F200
N30 G1 X0 Y0
N40 Z0
N50 M98 P10 L1
 o10
N60 M99
N70 X-20
N80 M98 P10 L1
 o10
N90 M99
M30

%

o10
G91 Z-0.5 F70
G90 Y-30 F150
G91 Z-0.5 F70
G90 Y0 F150



The machine make the first subprogram,but stop at the end of the it,doesn´t go to the coordenate X-20 to make the 2º subroutine.

Somebody please tell me what i´m doing wrong?


Thanks

Pedro ESteves