Posting 2 different B0 machining operations, no rotation commands.

[JB7280]

Is it possible to make Mastercam post B rotations, even though both toolpaths are at B0., but different work offsets?  I have 2 fixtures, with slightly different B work offsets, so I want to unlock the pallet, rotate, and lock.  But when I post these, it seems like Mastercam just sees B0, and doesn't try to rotate. 

 

Unfortunately I can't post a file, but I could quickly make a sample file, if I'm not making sense.   

[Jake L]

I've run into the same thing before. My workaround was using a manual entry with: rotary unlock, new offset B0, rotary lock. I'm sure you could make this happen automatically with the post but I haven't had the time to play with it.

You could probably accomplish the same thing with a force tool change, tho this would probably add unnecessary motion.

I'm also interested if there is a better way.

 

[crazy^millman]

With rotated planes and a correctly configure post then it should output the rotations you want. Really a couple different ways to control this. Can you make a dummy file with a couple toolpaths to use as example.

[gcode]

Without having a copy of the file I can't recommend a good solution

I would just post a  dummy drill cycle at a different B location that punches a hole in a safe place in the sky.

After posting, just delete the dummy drilling toolpath and you are good to go

 

[Leon82]

Can't you tell it if wcs changes re issue position command?

 

I did this with my probe cycle on the 5 axis. Instead of using force tool change of the wcs changes it zeros z and re issues unlock and positioning moves with the new offset 

ptlchg0$         #Call from NCI null tool change (tool number repeats)
      pcuttype
      pcom_moveb
      pcheckaxis
      c_mmlt$ #Multiple tool subprogram call
      comment$
      #pcan
      result = newfs(15, feed)  #Reset the output format for 'feed'
      pbld, n$, sgplane, e$
      pspindchng

      if sopcomm <> sblank,
        sopen_prn, sopcomm, sclose_prn, e$
      sopcomm = sblank

      if prb_flg = 1,   #WCS CHANGE FOR  PROBE
      [if workofs$ <> prv_workofs$,
        [
        sav_absinc = absinc$
        absinc$ = zero
        pbld, n$,"(WCS CHANGE RETURN Z TO ZERO)", e$
        pbld, n$, *sgabsinc, *sgcode, sg49, "G53","Z0",e$
        pbld, n$,"M132",e$
        pbld, n$, *sgabsinc, *sgcode,  pwcs, pfcout, e$
        pbld, n$,"M131",e$
        pbld, n$, sg43, *tlngno$, e$
        pbld, n$,"(PROTECTED POSITIONING X AND Y)" ,e$
        pbld, n$,"G65 P9510",pfxout, pfyout,e$
        pbld, n$,"(PROTECTED POSITIONING Z)" ,e$
        pbld, n$,"G65 P9510", pfzout,e$
        pe_inc_calc
        ps_inc_calc
        absinc$ = sav_absinc
        ]

[JB7280]

2 hours ago, crazy^millman said:

With rotated planes and a correctly configure post then it should output the rotations you want. Really a couple different ways to control this. Can you make a dummy file with a couple toolpaths to use as example.

That's the issue Ron, I think.  The planes aren't technically rotated, but they are different work offsets.   I'll make a dummy file in a moment.  

[JB7280]

3 hours ago, crazy^millman said:

With rotated planes and a correctly configure post then it should output the rotations you want. Really a couple different ways to control this. Can you make a dummy file with a couple toolpaths to use as example.

I would like for it to post Z retract, Rotary Unlock, B positioning move, and Rotary lock after the N2 line.   To correct for "fixture error"  I feel crazy, because people, including Mastercam Tech Support seem to think I'm doing something wild, lol.  But I am 100% certain I've done this fairly simply in other CAM softwares.  

 

3 hours ago, gcode said:

Without having a copy of the file I can't recommend a good solution

I would just post a  dummy drill cycle at a different B location that punches a hole in a safe place in the sky.

After posting, just delete the dummy drilling toolpath and you are good to go

 

I did something similar, temporarily, but the powers that be (aka management) likes to have files that post out, 100% ready to run.  

 

https://drive.google.com/file/d/1iUOKIpRsN_3lvTRoej_nlYAyfBDuc1ot/view?usp=sharing

[SuperHoneyBadger]

Are the two B0 offsets always the same relative to one another?

I would consider the first as B0 and the second as B6 (or whatever) and when they share a WCS, you know it will rotate between them.

Also on my horz, I need to force a tool change in between rotations for the same tool, or it will skip over the B call - might try that out. You'll be certain to get a retract then as well.

[JParis]

I built a whole section of logic that handles this for me...I have a jump height set in the MR's....on any offset change or rotation I output the jump height...

No "Force Tool Change" required.

[JB7280]

18 minutes ago, SuperHoneyBadger said:

Are the two B0 offsets always the same relative to one another?

I would consider the first as B0 and the second as B6 (or whatever) and when they share a WCS, you know it will rotate between them.

Also on my horz, I need to force a tool change in between rotations for the same tool, or it will skip over the B call - might try that out. You'll be certain to get a retract then as well.

In CAM, yes, they're the same.  In the machine, they're slightly different from each other.  So I need it to correct when going between the two offsets.  But yea, I'll probably do a force tool change for now, unfortunately.

 

11 minutes ago, JParis said:

I built a whole section of logic that handles this for me...I have a jump height set in the MR's....on any offset change or rotation I output the jump height...

No "Force Tool Change" required.

Haha, I have no idea what that means, but I assumed something like that is what's necessary, which is beyond my knowledge level.  Might have to get a post made for this.  

[ajmer]

i used an mpmaster i had 

i changed this

search for and uncomment this line

#           sav_rot_on_x = rot_on_x    #Uncomment this line to output rotary axis value even when it's not used

 

 

then at the end of ptlchg0$ i added a pfcout on that line

ptlchg0$         #Call from NCI null tool change (tool number repeats)

 was this

          else,
            [
            pbld, n$, sgabsinc, [if not(index), pwcs], pfxout, pfyout, pfzout, pcout, e$
            ]
          ]

i changed to 

 

          else,
            [
            pbld, n$, sgabsinc, [if not(index), pwcs], pfcout, pfxout, pfyout, pfzout, pcout, e$
            ]
          ]

 

 

 

gave me this output

N5 G00 G17 G20 G40 G80 G90
N10 G91 G28 Z0.
N15 (COMPENSATION TYPE - COMPUTER)
N20 T239 M06 ( 1/2 FLAT ENDMILL)
N25 (MAX - Z.25)
N30 (MIN - Z0.)
N35 G00 G17 G90 G54 B0. X-.25 Y.5 S1069 M03
N40 G43 H239 Z.25
N45 Z.2
N50 G94 G01 Z0. F6.42
N55 X-.75
N60 G03 X-1.25 Y0. I0. J-.5
N65 X1.25 I1.25 J0.
N70 X-1.25 I-1.25 J0.
N75 X-.75 Y-.5 I.5 J0.
N80 G01 X-.25
N85 Z.2
N90 G00 Z.25
N95 G55 B0. X-.25 Y.5 Z.25
N100 Z.2
N105 G01 Z0.
N110 X-.75
N115 G03 X-1.25 Y0. I0. J-.5
N120 X1.25 I1.25 J0.
N125 X-1.25 I-1.25 J0.
N130 X-.75 Y-.5 I.5 J0.
N135 G01 X-.25
N140 Z.2
N145 G00 Z.25
N150 M05
N155 G91 G28 Z0.
N160 G28 Y0. B0

[JB7280]

48 minutes ago, ajmer said:

i used an mpmaster i had 

i changed this

search for and uncomment this line

#           sav_rot_on_x = rot_on_x    #Uncomment this line to output rotary axis value even when it's not used

 

 

then at the end of ptlchg0$ i added a pfcout on that line

ptlchg0$         #Call from NCI null tool change (tool number repeats)

 was this

          else,
            [
            pbld, n$, sgabsinc, [if not(index), pwcs], pfxout, pfyout, pfzout, pcout, e$
            ]
          ]

i changed to 

 

          else,
            [
            pbld, n$, sgabsinc, [if not(index), pwcs], pfcout, pfxout, pfyout, pfzout, pcout, e$
            ]
          ]

 

 

 

gave me this output

N5 G00 G17 G20 G40 G80 G90
N10 G91 G28 Z0.
N15 (COMPENSATION TYPE - COMPUTER)
N20 T239 M06 ( 1/2 FLAT ENDMILL)
N25 (MAX - Z.25)
N30 (MIN - Z0.)
N35 G00 G17 G90 G54 B0. X-.25 Y.5 S1069 M03
N40 G43 H239 Z.25
N45 Z.2
N50 G94 G01 Z0. F6.42
N55 X-.75
N60 G03 X-1.25 Y0. I0. J-.5
N65 X1.25 I1.25 J0.
N70 X-1.25 I-1.25 J0.
N75 X-.75 Y-.5 I.5 J0.
N80 G01 X-.25
N85 Z.2
N90 G00 Z.25
N95 G55 B0. X-.25 Y.5 Z.25
N100 Z.2
N105 G01 Z0.
N110 X-.75
N115 G03 X-1.25 Y0. I0. J-.5
N120 X1.25 I1.25 J0.
N125 X-1.25 I-1.25 J0.
N130 X-.75 Y-.5 I.5 J0.
N135 G01 X-.25
N140 Z.2
N145 G00 Z.25
N150 M05
N155 G91 G28 Z0.
N160 G28 Y0. B0

Close, and gives me some hope.   I need retract, and unclamp/clamp comments.   I wish I knew more about editing posts.  But that's hopeful at least.