[Voss_Machine]

I'm having trouble programming a face groove, that also undercuts a diameter. It is to retain a spring on a collet. The groove enters the intersection of the diameter and the face at 25 degrees and has a radius of .078. I have a Mitsubishi tool that has a blade coming off at 45 degree and holds a .125 wide (full radius) insert.

Looking for some help with the code. I have a old seat of Surfcam, but can't seem to generate the tool path.

Thanks....Dan

[deadlykitten]

hy, pls post a drawing ... i don't understand exactly what u wish for

so far i draw the attached variants, but ... just be more precise

[Voss_Machine]

Like the example on the left in your attached drawing. I'll scan the print and attach it later today or tomorrow.

Thanks!

[Voss_Machine]

Thanks

[deadlykitten]

groove toward spindle / left or toward tailstock / right ? so, does the drawing represents the real setup ? please ... orientation

did i draw the tool ok ?

[Voss_Machine]

Groove towards tailstock...that just how the print was drawn.

And yes, the tool is drawn correctly. Note, I work in inches...Thanks!

Okuma Cadet LNC-8...OSP5020

[kla64]

If you still need help tomorrow, I can help when I get back to the shop. What version of surfcam are you using?

Sent from my SM-G900R4 using Tapatalk

[deadlykitten]

If you still need help tomorrow, I can help when I get back to the shop.

yes, i need a lamborghini if somehow you could, than ... i am here

What version of surfcam are you using?

i don't use cam's yet, just me ... i will give you code soon

[deadlykitten]

from attached image, what variant to you need ? for 3rd or 4th provide max diameter ...

a drawing with your part before and after this tool will help, so to know how much & where to rough or just explain

so groove radius is .078
tool radius is .125 / 2 > is ok ?

ps : not my deal, but for those conditions || 0.0005 B , p 0.001 A, i think you should use a slow feed when cutting if a lot of parts, craft with groove toward spindle

[kla64]

Dan,

Not sure that the tool you described will work without overcutting where the radius meets the shoulder. See the red lines in this.





If you are able to use a 45 deg tangent line out of the radius at the shoulder, then this code should work. Its programmed for rough, then finish.. You could skip the rough if you only want one pass across it.

Let me know if it works for you our not.


NAT01
T010101 (.125 WIDE FULL RAD)
(CORNER UNDERCUT TOOL)
(SET OFFSET LIKE OD TOOL)
G97 S500 M3
(SEMI LEAVES +.005/SIDE" X AND Z)
G0 X1.0556 Z-.0923 M9
G0 X.9378 Z-.1512
G1 X.7962 Z-.2219 F.002
X.9306 Z-.1548
G0 X1.072 Z-.0841
X.9718 Z-.0659
G1 X.8304 Z-.1366
X.762 Z-.2099
G2 X.76 Z-.2144L.0106
X.7662 Z-.2219L.0106
X.769 Z-.2231L.0106
G0 X1.0276 Z-.0938
(START OF FINISH)
X1.079 Z-.0876
G1 X.9376 Z-.1583
X.8034 Z-.2254
G3 X.7812 Z-.23L.0156
X.7634 Z-.2272L.0156
G0 X1.0608 Z-.0785
X.9628 Z-.0638
G1 X.8212 Z-.1345
X.753 Z-.2078
G2 X.75 Z-.2144L.0156
X.7592 Z-.2254L.0156
X.7634 Z-.2272L.0156
G0 X1.0264 Z-.0956
G00 X20. Z20. M9
M5
M1

[Voss_Machine]

I'm just looking for a tool path for the relief. The part is made from D2 and the run is 180 pieces. I will run them from a bar, so the relief needs to be machined towards the tailstock.

[Voss_Machine]

I see on the pdf what you were speaking about. Is there a reason the upper tangent line is at 45 degrees rather than the 25 degrees?

Given the type of part it is (the relief holds a spring) the 45 degree might work, but I'd have to get a variance from the customer.

[kla64]

I thought the 25 degree only applied to the one side. If both, then is it 25 degrees off the shoulder. I can redo . No problem

Sent from my SM-G900R4 using Tapatalk

[jphodson]

I hope I'm understanding your drawing, if not I apologize in advance.
Here's some code programmed from the insert radius center.
Machine Z-zero is set on face of part.

Jon


NPRG1 G0 G90 G95 X20 Z20 M1 M5 M9 M76 M216
N1 G50 S2000
N2 T050505 S1500 M3 (SolidTurn - Face Groove R.078)
N3 VLMON[5]=11
N4 G0 X1.66 Z.2 M8
N5 X1.0246
N6 Z-.0236
N7 G1 X1.0536 Z-.0304 F.002
N8 X.9341 Z-.1586
N9 G3 X.8779 Z-.1454 I-.014 K.0066 F.001
N10 G1 X1.0625 Z.0524 F.002
N11 X1.0915 Z.0457
N12 G0 X1.66
N13 Z.2
N14 G0 G95 X20 Z20 M5 M9

[deadlykitten]

from attached image, what variant to you need ? for 3rd or 4th provide max diameter ...

this is the 4th variant P & radius not required

toolpath in attached image

    G00 X=500/25.4 Z=200/25.4
    T...
    G97 S... M03/4 M08
    G00 X1.399-0.125 Z0.2-0.063


      ( X1.399     Z0.200 )
    G01 X0.903-0.125 Z-0.154-0.063 F...   G95
        X0.922-0.125 Z-0.140-0.063
    G00 X0.979-0.125 Z-0.100-0.063
        X0.979-0.125 Z+0.082-0.063
        X0.939-0.125 Z+0.082-0.063
    G01 X0.939-0.125 Z-0.081-0.063 F...   G95
        X0.879-0.125 Z-0.145-0.063
    G02 X0.928-0.125 Z-0.163-0.063 I0.014 K-0.006
    G01 X1.079-0.125 Z-0.087-0.063
        X2.372-0.125 Z-0.087-0.063


    G00 X=500/25.4 Z=200/25.4

[deadlykitten]

attached toolpath minimizes stress on tool

stress is always present, mostly refered as tension; when this tension goes over a limit, stress appears, and tool may get damaged or faster wear

may happen if insert is long, carbide is not tough, material is hard, toolpath goes over a broken line or small radius, etc

when crafting lot of parts, is good to take such things into consideration kindly !

ps : there is more stress each time a tool changes direction when cutting; direction changing with stress appears each time 2 segments ( with their length over a specific minimal length ) make an angle ( bigger than something close to 0 ); thus a circle with big radius may be considered "smooth" when cutting, compared to a circle with low radius ...

this may lead to faster wear, but tool life duration may still be reasonable; the phenomen may be heared by a trained ear is good to change the toolpath when tool is noisy

[Voss_Machine]

Thanks for all the help...I'll load these in and test then paths.

[Voss_Machine]

I hope I'm understanding your drawing, if not I apologize in advance.
Here's some code programmed from the insert radius center.
Machine Z-zero is set on face of part.

Jon


NPRG1 G0 G90 G95 X20 Z20 M1 M5 M9 M76 M216
N1 G50 S2000
N2 T050505 S1500 M3 (SolidTurn - Face Groove R.078)
N3 VLMON[5]=11
N4 G0 X1.66 Z.2 M8
N5 X1.0246
N6 Z-.0236
N7 G1 X1.0536 Z-.0304 F.002
N8 X.9341 Z-.1586
N9 G3 X.8779 Z-.1454 I-.014 K.0066 F.001
N10 G1 X1.0625 Z.0524 F.002
N11 X1.0915 Z.0457
N12 G0 X1.66
N13 Z.2
N14 G0 G95 X20 Z20 M5 M9

What is the N3 line?