Polar interpolation for Okuma VTM 200YB

[JeremyV]

Hi,

I know its an Okuma and its a major PITA, but... what is the best way of getting codes to function properly for face machining (polar interpolation)?

At the moment, we have the machine setup to do G101, G102, G103 and using L format, but the bloody thing still alarms out.   Do we need a M15 and M16 for directional control?  Are the negative X numbers correct?  We are trying to machine a massive watertrace feature into the part and initially with using C-axis milling (without polar), I have a 148 long page program that which the feed rate is too fast, so we had to have polar interpolation added and that part is not working.

 

The code below is how it currently posts out.   I know having G137 in there is bad, so we removed that.

 

N238(3.0 ISCAR FEED MILL SQUARE INSERT)

NT32 (RESTART POSITION)

N239 (RGH POCKET FEED MILL)

N240 (OPERATION NO - 7)

N241 G20 HP=4

N242 TC=1

 

N243 MT=3201

N244 M321

N245 TL=3232 BT=0 BA=0. G52

N246 MT=3001

N247 M146

N248 M110

N249 G00 C0.

N250 SB=605 M13

N252 G00 G17 X0. C0. Z5.

N253 M08

N254 M175

N255 M263

N256 G00 Z.5

N257 Z.01

N258 G94 G101 F30.

N259 Z-.12

N260 X.2435 C.0001 F137.

N261 G103 X-1.219 C.0001 L.7312

N262 X2.1935 C.0001 L1.7063

N263 X-3.169 C.0001 L2.6812

N264 X1.9081 C-3.3688 L3.6563

N265 G102 X3.6805 C-1.7808 L3.0725

N266 G103 X4.1435 C.0001 L3.6562

N267 X2.5956 C3.4558 L4.6312

N268 G102 X-.7912 C4.6214 L3.0725

N269 G103 X-5.0046 C1.023 L4.6313

N270 G102 X-3.8956 C-3.4956 L3.0725

N271 G103 X1.7142 C-5.4702 L5.6062

N272 G102 X5.7905 C-1.818 L3.0725

N273 G103 X6.0935 C.0001 L5.6062

N274 X4.2111 C4.6082 L6.5812

N275 X-.7817 C8.1904 L3.0725

N276 X-1.3553 C6.5239 L3.0725

N277 X-6.9372 C1.3104 L6.5812

[Greg Williams]

Looks like you don’t have the control option to run that code, I think it is called something like cylindrical C axis or similar.

 

Use G137 that will be better

Something like this, no helical arcs allowed

 

G270
(GWET-SPR-L-1__GCODE.MIN)
(POST REV - 14)
(DATE - 28-07-22)
(TIME - 11:18)
CLEAR
DRAW
M216
(TOOL - 8 OFFSET - 8)
(8 BULL-NOSED ENDMILL)
NAT8
G50 S1500
M110 M960
G0 G94 X999. Z355. T080808 M8
SB=3500 M13 M63
Z24.151
G0 C0.
G137 C0.
G0 X-29.992 Y-33.485
G17
G265 F8000 E0.02 J1
Z-5.349
G101 Z-5.849 F5000.
X-29.945 Y-33.469 Z-6.294
X-28.094 Y-32.855 Z-7.849
X-27.667 Y-32.68 Z-7.93 F1000.
X-26.718 Y-27.002 Z-9.02
G103 X-27.934 Y-25.625 L30.059

 

X-18.612 Y-39.919 Z-6.346
Z-5.846
G0 Z24.154
G136
G264
M12 M63
M109
G0 X999. M9
G0 Z355.
T0800
M215
M02
%

[JeremyV]

3 minutes ago, Greg Williams said:

Looks like you don’t have the control option to run that code, I think it is called something like cylindrical C axis or similar.

 

 

 

Use G137 that will be better

 

But when we use G137 - the machine alarms out.... we run that on X + C unless G137 should be ran in X+Y?

[Greg Williams]

3 hours ago, JeremyV said:

unless G137 should be ran in X+Y?

Thats the one