Citizen L20 polar interpolaton milling.

J

jetfuelgenius

Aluminum

Joined

Mar 5, 2005

Location

Alabama

• Apr 9, 2018

• #1

Can anyone help me out on my new Citizen. I'm new to the swiss automatic.
I need to mill a simple two flat shape on a .188 dia bar.
Using tool 33 with .1875 diameter mill. Milling per attachment.
Trying to use the same approach as my 3 axis lathe hasn't worked.
Please help.

 

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S

SWYooper

Aluminum

Joined

Feb 28, 2018

• Apr 9, 2018

• #2

Is your T33 in a face or cross configuration? I assume cross unless you have a mill with a corner radius that falls within the radius tolerance.

I have a fair bit of experience on L20s, I can probably help with more information. Care to post the snippet of code that isn't working, and what the tool is doing as coded?

 

J

jetfuelgenius

Aluminum

Joined

Mar 5, 2005

Location

Alabama

• Apr 9, 2018

• #3

It is in a face position. The mill has a .040 radius.

 

S

SWYooper

Aluminum

Joined

Feb 28, 2018

• Apr 9, 2018

• #4

I can work up a bit of code for you but it would be helpful to see what you have already to understand where the issue is. Do you have any other tools on the 30s stations? That can dictate whether you need to cut on the x or y axis.

Edit: I'm also not seeing the need for polar interpolation, looks to be a straight line cut to me.

 

Last edited: Apr 9, 2018

J

jetfuelgenius

Aluminum

Joined

Mar 5, 2005

Location

Alabama

• Apr 9, 2018

• #5

I’m getting a football shape.
G12.1 D1 E=C
G1 Z.095 F6.
G1G42X.125C0
C.0425
X-.125
C-.0425
X.125
C.2
G0Z-.1
G40Z-.2
G13.1

 

J

jetfuelgenius

Aluminum

Joined

Mar 5, 2005

Location

Alabama

• Apr 9, 2018

• #6

I’m cutting the part in $2 spindle. I don’t have Y on T33. Also I’m try to use a variable program from someone else.

 

S

SWYooper

Aluminum

Joined

Feb 28, 2018

• Apr 9, 2018

• #7

Ok, different story then. All four of our L20s have a Y-axis on the sub spindle side, my bad assuming they all had that.

 

S

SWYooper

Aluminum

Joined

Feb 28, 2018

• Apr 9, 2018

• #8

Do you have a G17 after the G12.1 call? That could be causing your issue. Your tool should also be positioned somewhere away from the start of the cut before calling cutter comp. I'm not sure how your 3-axis lathe likes it but Citizen wants the tools to be moving in the direction of the cut, at least a little bit, when calling a G41 or G42.

Edit: I'm not 100% it is necessary but I always have a decimal after any C axis move, even zero, so the C0 is C0. -- I've run into intermittent issues in the past because of that.

G12.1 D1 E=C
G17(!!)
G1 X.3 Z.095 F6.(!!)
G1G42X.125C0
C.0425
X-.125
C-.0425
X.125
C.2
G0Z-.1
G40Z-.2
G13.1

 

J

jetfuelgenius

Aluminum

Joined

Mar 5, 2005

Location

Alabama

• Apr 10, 2018

• #9

SWYooper said:

Do you have a G17 after the G12.1 call? That could be causing your issue. Your tool should also be positioned somewhere away from the start of the cut before calling cutter comp. I'm not sure how your 3-axis lathe likes it but Citizen wants the tools to be moving in the direction of the cut, at least a little bit, when calling a G41 or G42.

Edit: I'm not 100% it is necessary but I always have a decimal after any C axis move, even zero, so the C0 is C0. -- I've run into intermittent issues in the past because of that.

G12.1 D1 E=C
G17(!!)
G1 X.3 Z.095 F6.(!!)
G1G42X.125C0
C.0425
X-.125
C-.0425
X.125
C.2
G0Z-.1
G40Z-.2
G13.1

Click to expand...

Thank you. I will give this a try this morning.

 

S

SWYooper

Aluminum

Joined

Feb 28, 2018

• Apr 11, 2018

• #10

Any luck? Curious if I'm just spouting nonsense over here