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Messages - SDConcepts

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General Mach Discussion / Re: need help with g code and cutter comp issue
« on: November 03, 2008, 04:11:55 PM »
your right i had the arc programmed off center.  now if anyone has any tips of making the program faster or more logical please let me know.

General Mach Discussion / Re: need help with g code and cutter comp issue
« on: November 03, 2008, 02:23:51 PM »
here is a pic of what i'm trying to do. 

General Mach Discussion / need help with g code and cutter comp issue
« on: November 03, 2008, 01:27:00 PM »
i am trying to mill off a certain amount from the side of the part then adding a 2.5" radius arc into the side.  my x0 and y0 is set at the bottom left corner of the part and the arc center is X-2.18 Y .66, i am removing .231 materail from x prior to cutting the arc.  here is the code...

t1 m66 (1" end mill)
s600 M03
g00 g90 g55 x-2.0y-1.0
g43 h1 z3.0
g01 z0.0 f6.6
g01 x-1.0 g41 d1 f6.6
g1 x0.385 f6.6
g00 x-3.0
g1 x.077
g03 x.231 y1.13 r2.5
g01 x-3.0 g40
g28 g91 z0 m05
g28 g91 y0 m09

the arc is not cutting on the center of my part, for some reason its off on the Y.

thanks for the help

General Mach Discussion / Re: mach won't change tools
« on: October 25, 2008, 09:34:58 AM »
ok that did it. 

General Mach Discussion / Re: mach won't change tools
« on: October 24, 2008, 02:49:30 PM »

this is Mach 3 Mill.  i have no tool changer, but when i program an

M06 T2 or whatever, the tool called up won't change.  it stays at T0.

General Mach Discussion / mach won't change tools
« on: October 24, 2008, 09:34:57 AM »
i try entering my tool change as

M6 T4 and M6 T2 etc and it won't change the tool thats called up.  anyone know what going on here?

General Mach Discussion / tool and cutter comp issues
« on: October 24, 2008, 07:31:20 AM »
i'm new to mach 3 but not cnc programming and my mill is not doing what i expect it to.  i think i have multiple problems going on and it may be just with how mach interprets what i enter in the code.

1. tool slot number too large?  i am calling up T1.
2. cutter comp moves 1" cutter to some random number?  do you need to call up D1.0 to let cutter comp know what diameter the cutter is or will it pick that up from T1?
3. what info needs to be enterred in the tool table.  (brand new 1" end mill so i know the wear offsets are zero and i have enterred tool height and diameter.  tool height is -15.76 and diameter is 1.0.)
4.i am moving off of 0,0 and trying to step into the part calling up cutter comp.  so i make a move to

G1 x-1.0 y-1.0 F10
g1 x0 y0 F10

now with code i expect the cutter to be at X-.5 and y-.5 am i mistaken?

any help is greatly appreciated.

on  a standard cnc when using a g70/71 one of the rules is that you have to have ascending contours.  basically you can't do things like a ball and rough them out.  the g70/71 will rough out the front half only.  so ultimately i thnk all you really need to do is create a program that will:

1. create a wizard that will let you input a contour
2. offset the contour by what should be left for the finish pass (user defined finish depth)
3. generate code to rough with steps (user definied depth and feed rate)
4. generate code using the original contour for the finish pass (user defined feed rate)

also i believe that EMC has figured this out and my understanding is all this software is open source.  as long as your not profitting from this i don't think borrowing their code would be an issue. 

why not have the profile entered into the wizard?  ultimately when do you a profile there are some rules that apply and i would be happy to help with ideas on how to get this figured out.  ultimately you would need a cycle for turning and boring and i think a wizard would do just fine until the actual coding can be done in MACH3.  ultimately its the repetitive coding that gets tiresome for the profiles.  figuring out the points is not that difficult. 

i believe the coding for this is done on emc linux.  i was looking at switching over to EMC because of these exact canned cycles that are missing.  ultimately a peck drill cycle would be good as well.  if its there please excuse my request as i haven't looked at all the features in a while. 

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