Friday, December 18, 2020

Broaching in CNC-lathe

 The simple way to make an internal slot in your CNC-lathe


You need to get or make the tool, it's not included.

Video: 



An example of the tool (not tested and not sponsored)

Broaching tool



I read a lot of tutorials on how to broach slots, everyone is parametric, with R-values, and so on, and I thought, can you do this easy?.

My solution so far, the main program and a sub-program, some inc programming, and we're there

Main:

N10 G54

N20 

N30 WORKPIECE(,,,"PIPE",256,0,-35,-30,70,30)

N40 T="PLUNGE_CUTTER_3P" ;zero Z at center of tool

N50 G96 S10 M5 ;not the best "no rotation" command

N60 G94 F300 ;feed mm/min

N70 G0 X30 Z2 ;startpos

N80 KILSUB P10  ;subprogram, P=repetition times (how deep you go)

N90 G0 G53 X500 Z600 D0

N100 M30

and the sub:

N10 G54 ;just in case

N20 G91 X0.3 ;inc cut/sub run, aka cutting depth

N30 G90 ;abs prog

N40 G1 Z-20 ;depth in Z

N51 g0 Z2 ;return of tool

N60 m17 ;exit sub

Things that have a deep impact, the P-value is the cutting depth x how many repetitions needed.

something's not completely finished, never tried this for real, just couch-programming



Tuesday, December 8, 2020

NX, right plane (CSYS) from the start, manufacturing

Get the machine zero secure in NX

a disclaimer may just be in an earlier version of NX, in NX7.5 this is this for real  

NX can be a jerk if you do manufacturing on a workpiece where the CSYS (model zero) are "misplaced"
If you going to avoid that, make the model zero correct for manufacturing from start.
applies for both mill and turn (more on turn below)
check the video



BUT,(maybe an old prob, NX 7.5 do this, can't make it in NX11 now for some reason)
 revolved turning model workpiece work a little different, you should do your model with X as the center axis (usually Z). When you enter manufacturing, like magic, it transforms to Z as it should be....
If you will start with a model with the Z-axis as i "should be" good luck, you got manufacturing with X as center axis, totally wrong and hard to fix at this level. Can do more on that, ask!

Correct me down below if I did a bobo