m1.6x.35

[Manosteel503]

cant figure out how to machine this thread . im currently using a double line G76. cant get minor diameter to come in , i can get close but it snaps the part any help thanx
i have a star sr 10j

[ProProcess]

There are many things at work here.

First, we do not know the base material and that is a big factor, that aside...

Is the root radius of the tool properly sized, it may be too large?
If you are using a "Full Form" insert, try a small root radius non-forming insert.
in your G76 code vary the infeed angle, try a full 30° per side infeed.
Is the tool on center?
Is the thread very long?

This should get you started, let us know how you make out.

[Manosteel503]

im using a single point tool by thin bit it has a 29 deg. face with a .001 R
heres a peice of my program maybe this will help us better
M25
G97S1000M3
M11
G121
G0G40G99
M10
M200
M20
G0Z-.02
X.400
T200(TURN)
M3S2800
G0X.150Z-.020T2
G1Z0F.002
X-.010F.0015
X.038
X.0605Z.011F.0015
Z.315
G0X.5
M1
T400
S800M3
G0Z-.05T4
X.100
G76P060060Q0002R0000
G76X.0428Z.315R-.002P0080Q0002F.0137
G0X.5
M1

[ProProcess]

...
M1
T400
S800M3
G0Z-.05T4
X.100
G76P060060Q0002R0000
G76X.0428Z.315R-.002P0080Q0002F.0137
G0X.5
M1

Still no material,try this...

X.1
G4 U2.0
G76 P020040 Q.0015 R.0005
G76 X.0428 Z.315 R0 P.0089 Q.0030 F.0137

Let us know what happens with this.

[Manosteel503]

my material is.125" 304 ss im sorry , im running it right now any idea on speed for less tool pressure?
thanx

[ProProcess]

...any idea on speed for less tool pressure?
thanx

Not so much, though the 800RPM seems slow.
How did the code suggested earlier work out i.e. even if it did not work, what happended?

[Manosteel503]

the code kept giving me improper g71-76 alarms
i kind of blended our programs together with taking more depth of cut and i also split the length in to heres my program now. but now the back wont go in the gage the front is going fine its just a tool pressure issue i believe
T200(TURN)
M3S2800
G0X.150Z-.020T2
G1Z0F.002
X-.010F.0015
X.012
X.0605Z.024F.0015
Z.150
G0X.5
M1
T400
S800M3
G0Z-.05T4
X.100
G76P060060Q0015R0005
G76X.0428Z.150R0P0080Q0020F.0137
G0X.5
M1
T200(TURN)
M3S2800
G0X.150Z-.020T2
G1Z0F.002
X-.010F.0015
X.012
X.0605Z.024F.0015
Z.315
G0X.5
M1
T400
S800M3
G0Z.150T4
X.100
G76P030060Q0015R0005
G76X.0428Z.315R0P0080Q0020F.0137
G0X.5
M1

[UK-Engineer]

If you are able to you may have more success with thread rolling - i've done M1.6 many times in material like surgical steel and titanium for body jewellery - dies last for ages and rolled thread quality is far superior

For thread rolls we normally use Habegger in Switzerland - not sure if they have a US agent

http://www.habegger-sa.com/English/produits_en.htm

Turn to effective thread size of 1.373 with a 15-20 deg lead and use sprung collet and G32 feed on at 95% pitch, then reverse spindle and G32 out at 100% pitch

[PoiToi]

Some controls can only support a few lead in angles. (the last 2 numbers in the P word in the first G76). I bet that's what the improper G76 alarm was about. My citizen will only take 0, 29, 30, 55, 60 and 80, for example.


try using P010055 , this should not alarm out.

Also, I agree that the s800 is much too slow. Looking at a program where i single point a 6-32 thread in 304, i run at S2800.

Also, if you can go any faster on your turn, do that as well. 304 loves to work harden and if you don't take enough off fast enough, it turns impossibly hard real quick.
I also just realized that your OD is .060". >_<


try this, everyone else is doing it!! =P

T200(TURN)
M3S4000
G0X.150Z-.020T2
G1Z0F.002
X-.010F.0015
X.012
X.0605Z.024F.0015
Z.150
G0X.5
M1
T400
S2800M3
G0Z.150T4
X.100
G76P020055Q0005R0005
G76X.0428Z.150P0005Q0020F.0137
G0X.5
M1
T200(TURN)
M3S4000
G0X.150Z-.020T2
G1Z0F.002
X-.010F.0015
X.012
X.0605Z.024F.0015
Z.315
G0X.5
M1
T400
S2800M3
G0Z-.05T4
X.100
G76P020055Q0005R0005
G76X.0428Z.315R-.004P0005Q0020F.0137
G0X.5
M1

FOr the g76 you will want to start at the same z and cut air for the first half of your thread, otherwise you will get a line where the 2 threads meet.


let us know how it goes!

Edit:
Also, I agree 1000% with the suggestion of a thread roll. We have 2 of the Habegger units and they have paid for themselves over an over again. just be careful, it's no fun getting a stuck stud out of the rolls... I know from experience. >_> <_<

We got outs from alouette Tool co: www.alouettetool.com or 585.388.12440

[Manosteel503]

so now my thread tool is controlling everything on my thread heres my prog: now when i ran this my
maj: .0628
min: .0502
pit:.0568
even though my major started out at .0604

T200(TURN)
M3S4000
G0X.150Z-.020T2
G1Z0F.002
X-.010F.0015
X.03
X.0605Z.02F.0015
Z.1087
G0X.5
M1
T400
S2800M3
G0Z-.05T4
X.100
G76P020029Q0005R0005
G76X.0448Z.1087R0P0080Q0020F.0137
G0X.5
M1
T200(TURN)
M3S3200
G0X.150Z-.020T2
G1Z.1087F.0015
X.06
Z.1874
G0X.5
M1
T400
S2800M3
G0Z-.05T4
X.100
G76P020029Q0005R0005
G76X.0448Z.1874R0P0080Q0020F.0137
G0X.5
T200(TURN)
M3S3200
G0X.150Z-.020T2
G1Z.1874F.002
X.0605F.0015
Z.2661
G0X.5
M1
T400
S2800M3
G0Z-.05T4
X.100
G76P020029Q0005R0005
G76X.0448Z.2661R0P0080Q0020F.0137
G0X.5
M1
T200(TURN)
M3S3200
G0X.150Z-.020T2
G1Z.2661F.0015
X.0605
Z.320
X.0649
Z.345
G0X.5
M1
T400
S2800M3
G0Z-.05T4
X.100
G76P020029Q0005R0005
G76X.0448Z.345R0P0080Q0020F.0137
G0X.5
M0

[glenthemann]

sound to me like youre doing more forming than cutting during threading and its pushing the material outwards

[Manosteel503]

what can i do for this jobs due today still having problems