[deadlykitten]

hello all, does anyone use dynamic tool load control ?

https://www.okuma.eu/en/technologies...-load-control/

i think there should be an input for nr of flutes, and machine tries to keep same average load for a duration required to rotate the spindle with 360/z; also, it may be possible that the control detects automatically the number of flutes

it requires a quick reaction load monitor ... i think this delivers nice results for big tools, while little&fast ones may not be processed with same accuracy

question is if 1% of load monitor is the base unit of the cnc if load monitor is 0.1 acurate ( or 0.01 ), than there may be a chance for little tools

i think monitor reaction time shoud be circa1/100 seconds, and this is interesting, because such a reaction time has load-monitor on lathes, while a mill requires an overload for at least 1 second before showing an alarm .... it is a team-vs-team, but maybe the actual load monitor on a mill is more capable than what it delivers

[tea hole]

Um.

[deadlykitten]

hy / what i really dont like is that DTLC requires quick reaction monitoring, while default load-monitor on a mill will stop a tool only after 1 second of overload

i think both DTLC and LM have a lot in common

on a recent lathe setup, LM saved the day for me, at least 15 times : [ nasty material ] + [ less experienced operators ]

also there were 2 cases at 2000 parts, thus 1:1000, when the drill got stucked not when cutting, but when getting out of the hole

so i have peace of mind when machining on lathe / on the mill nothing happend so far, but i would really apreciate a quicker LM

teahole, someone, please help

[deadlykitten]

G23 is in da house
G23 ? G23 !!!!!!!!!
G@#
why crasing a lathe when G23 is there ?
the only absolute thing is G23
you wont believe it: G23 finally exposed
G2 + G3 = LOVE

---

N1   G00 X375-VETFX Z150-VETFZ
N2   T101010 M66

N3   G00 X108.5 Z53.8
N4   G29 PX=35 
N5   G01 X90 F500 G94
N6   G28

N7   G00 X0 Z10

to wisely use time, i used G29 ( trq limit ) only on a small area, where collision might ocure ... before and after this area i sticked to G00

F500 and PX35 is safe enough to let the machine actually crash again, and again, and again ...

hello all almost a year ago i needed, and succeded, to monitor a hot zone, where a crash may occure, if the operator forgot to remove the part now i can tell that there is more than 1 way to do it ... these samples are equivalent :

    G00         Z+V7
    G29 PZ=25
    G01         Z-V7    F+100   G94
    G28

 ( . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . )

    G00         Z+V7
    G29 PZ=60
    G23 PZ=25   Z-V7    F+100*5 G94 D+V7*2
    G28

 ( . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . )

    VLMZB [ 1 ] = 25
    VLMZ1 [ 1 ] = 25
    VLMZ2 [ 1 ] = 25
    VLMON [ 1 ] =  2
    G00         Z+V7
    G01         Z-V7    F+100   G94
    VLMON [ 1 ] = 0

---

there may be a hot zone inside the lathe cabinet, among which monitoring is required

if effort level should be :
... <= a random value, use above samples (*1)
...... clasical example : operator forgot to remove the part
... >= a random value, use G22 (*2)
...... clasical examples : senseless gauging, part transfer between spindles

---

(*1) 3rd sample requires LM to be on, so a fail may occure if it is off; please, how can i check if LM is on ?
(*2) G23 and G22 share same syntax

kindly !

[deadlykitten]

hello everybody G22 requires G29 before, and G28 after; thats the way the manuals present it



... but may i ask : does someone has an explanation for this ?

dont you think that G22 should work without those neighbours ?

  ( G29 PZ=25 )
    G22 PZ=25 Z... F... G94 D...
  ( G28 )

onestly, i really see no reason to remove the brakets; but i have to; why ?

---

i may have an answer that makes sense, but i would really appreciate some opinions

kindly!

[deadlykitten]

hello i am looking for an effect caused by editing the torque value ( attached )

if i set torque value at 50, 75 or 100%, and if i move the turret :
... from the hand wheel, with :
...... 0.001 increments, i can reach 250..265% load and cca0.1diff, and the motors shut down
...... 0.050 increments, i can reach load>290% and diff>0.25, without the motor shutting down; i didn't continued
... using a program with slow feed ( 1mm/min ), in all cases Zaxis_effort reached 257-258%, and diff was 0.115-0.119; maybe torque value has no effect in this case, because the feed is too low

it may be possible that the effect is increased at higher feeds, considering that this function should stop the machine if the rapids would hit something

generally, i use torque value = 50%, thus at minimal value, and i believe that it is better this way, rather than using a higher value

i would like to be sure instead of making suppositions / kindly

[deadlykitten]

hello

among other things, i have tried to create codes for :
... saving, loading and reseting load monitor values
... faster coding for VLMON
... enhance the safety for long time series

in november 2017 all those became a single unit. I did not shared it, because i needed to be sure that it works ... and it works

this is how i code the load monitor inside the main program:

    NOEX V166 = -1  ( it requires a common variable )
    CALL OLM64 ( adress64 : general protection activated right at the begining of the program )

    CALL OLM01 ( adress01 )
    cutting something
    CALL OLM02 ( adress02 )
    cutting something else
    CALL OLM64 ( adress64 again )
    some cutting
    CALL OLMOF ( load monitor disabled, near the end of the program )

after that i open a *.min, and i input the monitor values :

    NOEX VLMXB [  1 ] = ... 
    NOEX VLMX1 [  1 ] = ...  
    NOEX VLMX2 [  1 ] = ... 

    NOEX VLMMB [  2 ] = ... 
    NOEX VLMM1 [  2 ] = ... 
    NOEX VLMM2 [  2 ] = ... 

save + select + execute : it generates a master ssb soubroutine and i'm done !

---

advantages :
- all vlm*b,vlm*1,vlm*2 functions are grouped inside a single file
- no need to write the value for the VLMON :
... for example, if i wish to monitor C into #3, i won't write VLMON [ 3 ] = 4, but only CALL OLM03 : is easier and faster
... there is no VLMON [ arg ] = 0 lines , thus less code to right inside the program; status of a load monitor adress ( on / off ) is handled inside the master soubroutine that is generated automatically
- even if i don't use a VLMON for a specific operation, there is always active, in background, a monitoring value, which saves the day; examples :
... a drill broke, and the threading tool did not get damaged ( background Z monitor stopped the cnc )
... a reamer got stuck ( background M monitor stopped the cnc )
... too many chips got pressed between turret and cabinet ( Z again )


master benefit is not that the coding time is reduced, but that during cutting, all axis are monitorized : it gives peace of mind, especially when it stops the cnc and prevents damage; the stopping is not brutal, just stops check, replace, restart : that's all !


this one + tool offset checking so to prevent operator error + lower torque value for the rapids = less worries

---

what happens inside the min file :
... 1st of all, it resets all load monitor values ( if there is something from a previous setup, it will be gone instantly )
... it loads into #64 all the admisible limits : i use XZCYM = 80% + none for S
... it checks each load monitor value inputed, and inserts admisible limits into the axis that had not been declarated : for example, into #1 which uses only X, it will fill automatically ZCYM with 80%; also, for #2 which uses only M, it will fill XZCY with 80%
... data is written into a G-code format, and saved with ssb extension

pls find these codes :
... content for the min ( it is required to edit only the blue lines )
... example of a ssb generated by the min file / kindly

    CALL ORSLM


    NOEX VLMXB [  1 ] = 21          ( debitare ebos    )
    NOEX VLMX1 [  1 ] = 22
    NOEX VLMX2 [  1 ] = 23


    NOEX VLMMB [  2 ] = 30          ( burghiu          )
    NOEX VLMM1 [  2 ] = 33
    NOEX VLMM2 [  2 ] = 36


    NOEX VLMXB [  3 ] = 18          ( debitare finitie )
    NOEX VLMX1 [  3 ] = 19
    NOEX VLMX2 [  3 ] = 21


    CALL OAMV


M02


 ( . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . )


ORSLM ( reset load monitor )


        NOEX  LV01 = 0
  NHERE NOEX  LV01 = LV01 + 1
        NOEX VLMXB [ LV01 ] = 0 VLMX1 [ LV01 ] = 0 VLMX2 [ LV01 ] = 0
        NOEX VLMZB [ LV01 ] = 0 VLMZ1 [ LV01 ] = 0 VLMZ2 [ LV01 ] = 0
        NOEX VLMSB [ LV01 ] = 0 VLMS1 [ LV01 ] = 0 VLMS2 [ LV01 ] = 0
        NOEX VLMCB [ LV01 ] = 0 VLMC1 [ LV01 ] = 0 VLMC2 [ LV01 ] = 0
        NOEX VLMMB [ LV01 ] = 0 VLMM1 [ LV01 ] = 0 VLMM2 [ LV01 ] = 0


  IF [ LV01 LT 64 ] NHERE


RTS


 ( . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . )


OAMV ( adjust monitor values )


    FWRITC res-olmts-v11.ssb;A


    CALL OAMV3 ( write blank line ) (*2)


    CALL OTIME
    WRITE C


    CALL OAMV3 ( write blank line )


           ( '1234567890123456' - max 16 chars )
    NOEX PUT 'OLMOF ( Load Mon'
    NOEX PUT 'itor OFf )'
    WRITE C


    CALL OAMV3 ( write blank line )


    NOEX PUT '  VLMON [ V166 ]'
    NOEX PUT ' =  0'
    WRITE C


    NOEX PUT '  NOEX    V166  '
    NOEX PUT ' = -1'
    WRITE C


    CALL OAMV1 ( write RTS )


    NOEX       V1 = 0
    NHERE NOEX V1 = V1 + 1 (*1)
          NOEX V2 = VLMXB [ V1 ] + VLMZB [ V1 ] + VLMSB [ V1 ] + VLMCB [ V1 ] + VLMMB [ V1 ] ( + VLMYB [ V1 ] )


               IF [ [ [ V2 NE 0 ] OR [ V1 EQ 64 ] ] EQ 0 ] NJUMP


               NOEX V3 = 0


               NX     IF [    VLMXB [ V1 ] NE 0 ] NWRTX


                         NOEX VLMXB [ V1 ] = 80    ( general protection limits for X axis )
                         NOEX VLMX1 [ V1 ] = 80
                         NOEX VLMX2 [ V1 ] = 80


               NWRTX  IF [    VLMXB [ V1 ] EQ 0 ] NZ
                         NOEX V3 = V3 +   1


               NZ     IF [    VLMZB [ V1 ] NE 0 ] NWRTZ


                         NOEX VLMZB [ V1 ] = 80                         ( idem for Z axis )
                         NOEX VLMZ1 [ V1 ] = 80
                         NOEX VLMZ2 [ V1 ] = 80


               NWRTZ  IF [    VLMZB [ V1 ] EQ 0 ] NC
                         NOEX V3 = V3 +   2


               NC     IF [    VLMCB [ V1 ] NE 0 ] NWRTC


                         NOEX VLMCB [ V1 ] = 80                                (   C   )
                         NOEX VLMC1 [ V1 ] = 80
                         NOEX VLMC2 [ V1 ] = 80


               NWRTC  IF [    VLMCB [ V1 ] EQ 0 ] NS
                         NOEX V3 = V3 +   4


               NS     IF [    VLMSB [ V1 ] NE 0 ] NWRTS


                         NOEX VLMSB [ V1 ] = 80-80                             (   S   )
                         NOEX VLMS1 [ V1 ] = 80-80
                         NOEX VLMS2 [ V1 ] = 80-80


               NWRTS  IF [    VLMSB [ V1 ] EQ 0 ] NM
                         NOEX V3 = V3 +   8


               NM     IF [    VLMMB [ V1 ] NE 0 ] NWRTM


                         NOEX VLMMB [ V1 ] = 80                                (   M   )
                         NOEX VLMM1 [ V1 ] = 80
                         NOEX VLMM2 [ V1 ] = 80


               NWRTM  IF [    VLMMB [ V1 ] EQ 0 ](NY) NWRT
                         NOEX V3 = V3 +  16


             ( NY     IF [    VLMYB [ V1 ] NE 0 ] NWRTY


                              VLMYB [ V1 ] = 80         )                      (   Y   )
                    (         VLMY1 [ V1 ] = 80
                              VLMY2 [ V1 ] = 80


               NWRTY  IF [    VLMYB [ V1 ] EQ 0 ] NWRT
                         NOEX V3 = V3 + 128             )


               NWRT CALL OAMV3 ( write blank line )
                    NOEX PUT 'OLM'
                    CALL OAMV2 ( write V1, with 2 chars )
                    CALL OAMV3 ( write blank line )
                    NOEX PUT ' IF [ V166 EQ -1'
                    NOEX PUT ' ] NJUMP'
                    WRITE C
                    NOEX PUT '       VLMON [ V'
                    NOEX PUT '166 ] = 00'
                    WRITE C
                    NOEX PUT ' NJUMP NOEX    V'
                    NOEX PUT '166   = '
                    CALL OAMV2 ( write V1, with 2 chars )
                    NOEX PUT '       VLMON [ V'
                    NOEX PUT '166 ] ='
                    NOEX PUT V3 , 3
                    WRITE C
                    CALL OAMV1 ( write RTS )


          NJUMP IF [ V1 LT 64 ] NHERE


    CALL OAMV3 ( write blank line )


    NOEX PUT ' ( grija la codu'
    NOEX PUT 'rile de serie ca'
    NOEX PUT 're se comporta d'
    NOEX PUT 'iferit pe ultima'
    NOEX PUT ' piesa )'
    WRITE C
    NOEX PUT ' ( este posibil '
    NOEX PUT 'sa iti sara OLMO'
    NOEX PUT 'N #64; in acest '
    NOEX PUT 'caz, poate merge'
    NOEX PUT ' sa-l pui dupa E'
    NOEX PUT 'ND )'
    WRITE C


    CLOSE C


RTS


 ( . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . )


OAMV1 ( write RTS )


  CALL OAMV3 ( write blank line )


  NOEX PUT 'RTS  ( . . . . .'
  NOEX PUT ' . . . . . . . .'
  NOEX PUT ' . . . )'
  WRITE C


RTS


 ( . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . )


OAMV2 ( write V1, with 2 chars )


  IF [ V1 GE 10 ] NJUMP
        NOEX PUT '0'
        NOEX PUT V1 , 1
        GOTO NEND
  NJUMP NOEX PUT V1 , 2
  NEND WRITE C


RTS


 ( . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . )


OAMV3 ( write blank line )


  NOEX PUT ' '
  WRITE C


RTS


 ( . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . )


 (   X Z C S  M  W S2   Y   B
     1 2 4 8 16 32 64 128 256   )


 ( . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . )

OLMOF ( Load Monitor OFf )


  VLMON [ V166 ] =  0
  NOEX    V166   = -1


RTS  ( . . . . . . . . . . . . . . . . )


OLM01 ( Load Monitor on for adress 01 )


 IF [ V166 EQ -1 ] NJUMP
       VLMON [ V166 ] = 00
 NJUMP NOEX    V166   = 01
       VLMON [ V166 ] = 23


RTS  ( . . . . . . . . . . . . . . . . )


OLM02 ( Load Monitor on for adress 02 )


 IF [ V166 EQ -1 ] NJUMP
       VLMON [ V166 ] = 00
 NJUMP NOEX    V166   = 02
       VLMON [ V166 ] = 23


RTS  ( . . . . . . . . . . . . . . . . )


OLM03 ( Load Monitor on for adress 03 )


 IF [ V166 EQ -1 ] NJUMP
       VLMON [ V166 ] = 00
 NJUMP NOEX    V166   = 03
       VLMON [ V166 ] = 23


RTS  ( . . . . . . . . . . . . . . . . )


OLM64 ( Load Monitor on for adress 64 )


 IF [ V166 EQ -1 ] NJUMP
       VLMON [ V166 ] = 00
 NJUMP NOEX    V166   = 64
       VLMON [ V166 ] = 23


RTS  ( . . . . . . . . . . . . . . . . )