need help when using G17

[goran55]

need help when using G17 XY axis on lathe, the mastercam output coordinates are obtained by diameter, but it does not suit me, I need to output code by radius, how to fix it?

I need it for Siemens 840C with c axis, which has xy coordinates set by radius.

turning must be by diameter

any idea???

[NOTW Programmer]

Which post are you using, In-House or MPMaster. Have you tried the Generic post to see what the output looks like.

 

Under Machine Specific Settings

dia_mult    : 2     #Multiplier for output on X axis (Neg. switches sign of X)

 

Try changing that to 1 like the value for Y and Z are.

[goran55]

I use GENERIC FANUC AXIS LATHE C-post with some changes that can work with Siemens 840C, I tried to change

dia_mult: 2 # Multiplier for output on X axis (Neg. switches sign of X)

milling output codes look good (I did not tried it on the machine)

but turning must remain at diameter

[NOTW Programmer]

Then you must place a conditional statement that chages the dia_mult from 2 to 1 and back to 2 after milling ops are complete, something along the lines of:

if cuttype = 4, dia_mult = 1
...

And towards the end of the mill tool change, set it back like this:

dia_mult = prv_dia_mult

What are you trying to do a C-axis contour or a Cross conntour. I fired up my debugger and used the same post as you and got a good output.

[goran55]

Can you send your repaired postprocessor, I tried it with your modifications, but I'm stuck , I would be grateful