Macturn OSP100 Threading

[Green Button]

Macturn 350 OSP100

We are trying to do do threading with G31.
Spindle speed seems to vary form commanded 160 to 200. Commanded is 180.
It seeems that subspindle is lack of power but is this possible ?
Diameter is 160mm, pitch 6,0mm
We are using M41 (small gear)
If you are taking just 0.25mm chip in diameter, machine starts to vary rpm......

-GB

Similar Threads:

• MU-400VA With Matrix, OSP100 -
• Need Help!- Macturn 350 OSP100 Z2 servo vibration
• Need Help!- Disk Number 6 of OKUMA OSP100
• Problem- Okuma Macturn 350 OSP100
• Need Help!- touch screen problem with osp100

[deadlykitten]

hy remove G96 ?

if you have G97, than pls share code ...

is this threading on 1st or 2nd spindle ?

[deadlykitten]

even if you use G96, rpm range arround o160 for pitch6 should be less than 10o/min, while you have 40=200-160o/min

to achieve the 40o/min difference, you should be starting at o195, thus radial_X_clearance will be (195-160)/2=17.5mm

If you are taking just 0.25mm chip in diameter, machine starts to vary rpm

and what if chip is <> 0.25 ? does this has a conection with cutting depth ? kindly !

[Superman]

hy remove G96 ?

if you have G97, than pls share code ...

is this threading on 1st or 2nd spindle ?

ahh.... read the whole thread.....he said..... "subspindle"

Macturn 350 OSP100

We are trying to do do threading with G31.
Spindle speed seems to vary form commanded 160 to 200. Commanded is 180.
It seeems that subspindle is lack of power but is this possible ?
Diameter is 160mm, pitch 6,0mm
We are using M41 (small gear)
If you are taking just 0.25mm chip in diameter, machine starts to vary rpm......

-GB

Looking at the standard machine spes for a 350-W..... main spindle is a 22 horsepower, where the sub is only a 11Hp, & the M-Spindle is also only 11Hp
- so the subspindle & M-Spindle have 1/2 the power compared to the main spindle..... probably best to do this size thread on the main spindle


I assume that G97 S160 is being used..... equates to about 90 m/min cutting speed
- 6mm pitch...... must be a decent size tip........ look at using a Vee cutter to rough mill the thread, before using a turning tool, you should be able to zigzag the depths to use both side of the tip
( I assume a 60° metric thread form )

[Green Button]

Hi!

Thanks for replies.Working on subspindle, G97 on.
Tip size 1,2mm

inside taper thread, 3 degrees.(thread like DIN 405 )
We are cutting thread with single lines (every chip is programmed separately), threading cycle not possible to use.


Example line CHIP 1:
G0 X154.855
Z13.802
G31 X167.155 Z-94. I-5.65 F6.35

CHIP 2
G00 X154.855
Z13.405
G31 X166.489 Z-94. I-5.629 F6.35

We also try to do this on Okuma main spindle but sama results.

Same part is driven by Old Doosan Puma 230 (FANUC), and it goes without problems.
Here is Fanuc code:

G0 X154.855
Z13.802
G92 X155.855 Z-94. R5.65 F6.35

G0 X154.855
Z13.405
G92 X155.913 Z-94. R5.629 F6.35



-GB

[deadlykitten]

please, are you sure that you are looking on the screen at S parameter, and not at V parameter ?

[deadlykitten]

i have rewriten your code, and also i tested yours : rpm was stable
... during 1 pass, V varied with cca30 units
... during all passes, V varied with cca60 units

    G50 S601
    G00 X450 Z150
    T010101
    G97 S600 M03 M41

    V1=154.855 ( X START )
    V2=2*5.65  ( X PROJECTION FOR Z=94+13.802 AND ALFA=3)

    V1=V1-V2
    G00 X+V1 Z13.802

    CALL OSUB LV00 = 0
    CALL OSUB LV00 = 0.33
    CALL OSUB LV00 = 0.30
    CALL OSUB LV00 = 0.28
    CALL OSUB LV00 = 0.26
    CALL OSUB LV00 = 0.24
    CALL OSUB LV00 = 0.22
    CALL OSUB LV00 = 0.22
    CALL OSUB LV00 = 0.21
    CALL OSUB LV00 = 0.19
    CALL OSUB LV00 = 0.18
    CALL OSUB LV00 = 0.17
    CALL OSUB LV00 = 0.16
    CALL OSUB LV00 = 0.15
    CALL OSUB LV00 = 0.14
    CALL OSUB LV00 = 0.13
    CALL OSUB LV00 = 0.12
    CALL OSUB LV00 = 0.11
    CALL OSUB LV00 = 0.10
    CALL OSUB LV00 = 0.10
    CALL OSUB LV00 = 0.05
    CALL OSUB LV00 = 0.02

    G00 X450 Z150

M02

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

OSUB

    V1=V1+LV00*2
    G00 X+154.855-0.01
    G31 X+V1+V2 Z-94 A=180-3 F6 G95

RTS

    G50 S2000
    G00 X450 Z150
    T010101
    G97 S600 M03 M41

    G00 X154.855 Z13.802
    G31 X167.155 Z-94. I-5.65 F6.35

    G00 X154.855 Z13.405
    G31 X166.489 Z-94. I-5.629 F6.35

    G00 X450 Z150

M02

there are some things with your sample :
... why 6.35 and not 6 ?
... why variable I ?

[deadlykitten]

threading cycle not possible to use

this code delivers single pass behaviour for a threading cycle

    G50 S2000
    G00 X450 Z150
    T010101
    G97 S600 M03 M41

    V1=154.855 ( X START )
    V2=2*5.65  ( X PROJECTION FOR Z=94+13.802 AND ALFA=3 )

  ( V1=V1-V2 )
    G00 X+V1-0.01 Z13.802

  ( CALL OSUB LV00 = 0 )
    CALL OSUB LV00 = 0.33
    CALL OSUB LV00 = 0.30
    CALL OSUB LV00 = 0.28
    CALL OSUB LV00 = 0.26
    CALL OSUB LV00 = 0.24
    CALL OSUB LV00 = 0.22
    CALL OSUB LV00 = 0.22
    CALL OSUB LV00 = 0.21
    CALL OSUB LV00 = 0.19
    CALL OSUB LV00 = 0.18
    CALL OSUB LV00 = 0.17
    CALL OSUB LV00 = 0.16
    CALL OSUB LV00 = 0.15
    CALL OSUB LV00 = 0.14
    CALL OSUB LV00 = 0.13
    CALL OSUB LV00 = 0.12
    CALL OSUB LV00 = 0.11
    CALL OSUB LV00 = 0.10
    CALL OSUB LV00 = 0.10
    CALL OSUB LV00 = 0.05
    CALL OSUB LV00 = 0.02

    G00 X450 Z150

M02

OSUB

    V1=V1+LV00*2
    G00 X+154.855-0.01
    G71 X+V1 Z-94 A=180-3 D0.001 H0.001 F6 G95 

RTS

( 154.855+2*0.33=155.515 )
( 155.515+2*0.30=156.115 )
( 156.675 )
( 157.195 )

shared codes are prety close to their final form, and should be enough to give you an idea

thats all from me now kindly !

[Green Button]

Wow thats lot of info thanks.
-pitch is 6,35 not 6
-its a 3 degrees taper thread so i have to use variable I to tell taper size

"please, are you sure that you are looking on the screen at S parameter, and not at V parameter ?"
Could you help a little bit with this. V parameter ? How could i be sure to watch S parameter ?

[deadlykitten]

pitch is 6,35 not 6

hy Green no big deal, but in 1st post you said pitch6

its a 3 degrees taper thread so i have to use variable I to tell taper size

in your sample you have different Zstart and different I for each pass :
... different Zstart involes a custom infeed patern; but Zend is constant for each pass, and if you use a custom infeed patern, than :
...... apply same Z variation also to Z end, not only Z start ( same Z is one thing, different radial sections is another ), or
...... be sure that there is a groove / clearance near thread end which wont break the tool in the long run
... different I may mean :
...... passes at different angles
...... passes at same angles but with different triangle hypotenuse length; and why did you not used equal hypotenuses ? it should work just fine if there is a groove after the thread, and also code would be simpler; if there is no groove, you need a leed out movement, so not to break the tool, but tool life may be reasonable without this ; etc etc etc

too many questions so i simply rewrite the code instead of trying to check yours, because it was faster for me ...

i tested my code looking for S variations : all good
i tested those 2 paragraphs of yours : still, all good

at this moment, i thought that it may be :
... a display reading error ( V instead of S )
... a control issue, so i posted last code with G71 that maybe performs differently on your lathe

Could you help a little bit with this. V parameter ? How could i be sure to watch S parameter ?

during testing i was looking at S parameters, so to see if it changes, and it did not

but while i was staring at the screen, with my eye corner i saw that V parameter changes, and i thought that you maybe have looked at it

no ofense, just saying, thats all

S parameter displays current rpm
V parameters displays current M/min

when G97 is used, if you are looking on the screen, should see S constant and V variable
when G96 is used, if you are looking on the screen, should see V constant and S variable

if you still have rpm variations, please share your entire code ; kindly !

[deadlykitten]

try running a simple program, with a single pass ... for example this one :

    G50 S2000
    G00 X450 Z150
    T010101
    G97 S600 M03 M41

    G00 X154.855 Z13.802
    G31 X167.155 Z-94. I-5.65 F6.35

    G00 X450 Z150

    M02

if rpm changes, than share that program kindly !