Messages

21

G-Code, CAD, and CAM discussions / Re: G42 problem

« on: December 03, 2006, 04:27:11 PM »

Graham....The Lcam file and the tap file are on its way to you..You are more than welcome to post it here and show the file here..please do..I forgot the dxf file I will resend...Michael

22

G-Code, CAD, and CAM discussions / Re: G42 problem

« on: December 03, 2006, 03:36:23 PM »

Thank you Graham,I appreciate your fantastic help..It is amazing how much patience you have!!...This is what I am trying to do..I like to design and build model airplanes using autocad 2000...after drawing the part of the plane (a wing rib for ex.) ..I import the dxf file to Lazycam..this rib may have 3 or 4  lightening holes in it..as you know it has three options for the lead in..I do that for each hole and for the outside profile of the rib..these lead ins are a good size for a clean cut as you described..I put a check in the box that says..Use G41/G42 on lead in outputs...in the Posting options..After creating the G code, I open the file up using notepad ..You can see the lines (many of them) that has the G 41 or G42 on it...But that is all the line has...G42...nothing more...I go to each of these lines and add P0.0625...To make the line read exactly this...G42P0.0625....For a .125 router bit..If it reads G41 I put in...G41P0.0625...With the lead ins created in Lazycam and the modifying of the G41/G42 lines,I should be done ..shouldn't I  ??  Michael

23

G-Code, CAD, and CAM discussions / Re: G42 problem

« on: December 03, 2006, 02:18:39 PM »

This is the part where I feel like such a dunce...On that top left line...the cords are X0,Y0....X25,Y0   with the lead in and everything that cutter bit is going right down the middle of the line...then my part would be 1/16th too small (with a 1/8th bit)  I would need the bit to travel on the line of X0,Y.0625...X25,Y.0625...Do I need to draw my part a 1/16th of an inch bigger all away around to make the bit cut my part at the right size???

24

G-Code, CAD, and CAM discussions / Re: G42 problem

« on: December 03, 2006, 02:57:31 AM »

(TOP LEFT EDGE)
G54 G00 G90 G43 X-2.5 Y12.5 Z25. H3 S2500 M3
Z1.
G01 Z-1. F500.
G41 P5.0 X-7.5 Y7.5               I see the g41 code here with P offset and the offset coordinates...  How are you coming up with these coordinates??
G03 X0. Y0. R7.5                    Do you have to have these coordinates?   I thought you just put in the P5.0 and you were done??
G01 X25.                               
G03 X32.5 Y7.5 R7.5
G01 G40 X27.5 Y12.5
G00 Z25.

25

G-Code, CAD, and CAM discussions / Re: G42 problem

« on: December 02, 2006, 11:55:12 AM »

I think I have it...Let me see if I have the concept by trying to explain it back to you..If I have a straight level line on my screen horizontal...If the code has the bit traveling left to right and I want the bit to be offset to the north side (top) then a G41...traveling the same direction but offset to the south (bottom) then a G 42....If the code has the bit traveling right to left...and I want the bit offset to the north,then a G42,,,If I want it to the south then a G41...With no tool changer then the code would be G41p.0625...if I had a router cutter bit of .125 inches...Sir Graham..can you grade my test please  : )

26

G-Code, CAD, and CAM discussions / Re: G42 problem

« on: December 01, 2006, 09:50:34 PM »

N40    X0.5817 Y0.5729
N45 M3 S100
N50    Z0.1000
N55 G1 Z-0.2500  F3.00
N56 G42 p0.125
N60    Y0.4004  F10.00
N65    X0.2129

On line N56...if you replaced the G42 with G41 would the offset be on the left side of the path..I just imagine that I am the cutter bit going down the path like a highway..wouldn't a G41 place me in the left lane and a G 42 place me in the right lane and no offset code would put me in the middle lane..Am I thinking right here??