Slitting pre-patterned film at angle on stage

[mfield]

Hi. I'm new to G code programming.

I have a metal-patterned film that I need to slit into ribbons. The film pattern is not square with the machine travel axes.

Anyone know how to tell the machine to cut on the angle in a straight line, then step a fixed distance and slit parallel to the first cut?

Thanks for any help you can give.

mf

[stevo1]

What kind of machine and control are you using? There is a workcoordinate rotation function that is optional.

Can you figure out what anlge the piece is sitting at in the relation of your axis then trig out the angle that needs to be cut and then incrementally step over?

[mfield]

Thanks for the reply. I'm using an old Bridgeport with a "MachineMaster" cnc conversion kit. It says I can incorporate a sub-routine, so I think I can compute the angle and trig out the steps. I'd hoped there was a command I could use to re-define the axes to correspond to the angled part.

mf

[stevo1]

I am not familiar with "machine master". Unlsess it has something in the book that says you can use rotation or a code I would assume that you can not. If you have any problems let me know I will try and help.

Best of luck!
Steve

[mfield]

I checked there is not a command to re-define the axes.

I move from one side at x0,y0 to the far right side at, say, x14.001, y.373.

How do I pass that x and y to a subroutine or macro automatically so I can compute the angle and do some trig?

Thanks,

mf

[stevo1]

I am not sure of your control works. Do you have variables that you can use? like #1-#33 or #100 ect.? and use absolute and incrimental

If so
O0001(Main Program)
#1=14.001(X)
#2=.373(Y)
#3=1.0(Width of Strip)
#4=5(number of strips)
M98P100
M30

O0100(Sub Routine)
#5=#3(DUMMY VAR.)
N100
G0G90X0Y#5Z.5(Y- OR Y+ DEPENDS ON DIRECTION OF YOUR AXIS & WERE YOU START)
Z0
G1G91X#1Y#2
Z.5
#4=#4-1
#5=#5+#3
IF[#4NE0]GOTO100
M99

I don't know if this will work for you. If you know how far in X and Y you must go then you should not have to trig anything in your sub routine. Just run incrimentally. But with the numbers that you gave X14.001 Y.373 it is rotated 1.52605 degrees. If you just want to do 1 strip at a time you can do that in 1 small main program just command your Y for the width of the strip in absolute then incrimentally move your X and Y distance.

G0G90X0Y1.0Z0(KEEP CHANGING YOUR Y FOR EVERY STRIP)
G1G91X14.001Y.373
Z.5
M30


Let me know if this helps you. Good luck!

[mfield]

Steve, this looks great. I can't try it until Monday morning (the shop is down for power company work), but I'll be there early!

Thanks so much for your help.

Regards,

mf

[mfield]

Many thanks, Stevo.

I took your suggestions and worked with my non-standard controller.

It liked moving to a computed x and y for each step in relative mode. It's one computation and two entries per part (22 or more cuts). It's not elegant, but it works!

Thanks again. This is a great forum and a wonderful human kindness for less-experienced folk like me.

Regards,

Mfield

[stevo1]

Sorry been out of town. Thats good I'm glad it workded for you. Your welcome for the help.

Best of luck to you!
Steve