Anti-barreling on wire EDM

[Kimmo]

Hi, I run a Sodick ALC600G wire EDM.
About to make 90mm tall punches with high accuracy and straightness requirements.
I got the BSA taper correction dialed in and the workpiece is now at the same diameter at under +/- 0,001 mm top vs. bottom. I added the Anti-Barreling bit to the BSA code.

Cutting values look like this:

( Search Data : SL,Water,D0.25mm,Brass,Steel,H90mm,Punch,Close,2.6,3orMore )
( ON OFF IP HRP MAO SV V SF C PIK CTRL WK WT WS WP PC SK BSA )
C000 = 012 014 2215 000 240 +040.0 8.0 0025 0 000 0000 025 160 080 045 000000 000000 110000
C001 = 014 015 2215 000 252 +020.0 8.0 0028 0 000 0000 025 160 122 063 000000 000000 210015
C002 = 002 009 2215 000 000 +053.8 5.0 1065 0 000 0000 025 180 122 240 000000 000000 310027
C003 = 001 014 2210 000 000 +025.3 2.0 1066 0 000 0000 025 180 122 240 000000 000000 410015
C004 = 019 020 0504 000 000 +026.0 6.9 1097 0 000 0000 025 180 122 240 000000 000000 510030
C905 = 100 000 0001 000 000 +017.7 6.5 5020 0 045 0000 025 180 122 240 000012 000006 610020
H000 = +000000.010000
H001 = +000000.245500
H002 = +000000.175500
H003 = +000000.148500
H004 = +000000.137500
H005 = +000000.132500
H999 = +000000.000000 ( Taper Offset )

(To the BSA code I changed the second digit from left from zero to one on each line to activate anti-barreling function. Also added 10 units to the right hand end of the code to correct 0,001 degrees. )
TP92.0
TN0.0

N00001 G90 G55 G00 X0.0 Y0.0 U0 V0
Z0
N0003 T91 (Thread Wire)
QAIC(2,1,0.1250,011.5,0.1725,0.0800,031.0,0006,0022,20,035)
SFCC00070090

etc...

So, if I understood correctly, the antibarreling is in use, but I now get 0,004 mm bigger OD measuring at the center of the piece compared to either end of it.
Can I adjust the effect of the function with TLR like the Sodick guide says?
How much should I punch in it?
It says on the guide it's unit is % and range from -99 to+999. Percent (%) of what?
Someone said I should adjust SV instead, but I'd rather try if the Anti-Barreling really works.

 

[Shane030173]

Why SFCC?? Thats for blowing out corners for die / punch clearance.

CSP02500002912;
TT3.69;
TB0.0;

Sets barrel control.

 

[Kimmo]

Thanks for quick comment.

Well the SFCC is just because the part has corners as well as radiuses. My Esprit CAM gives that. Does it affect barrel control negatively?
Is QUAIC ok?
Wow, so it doesn't do anything without TT and TB? I would have thought TP and TN are enough.
Can you say how much the TLR% affects dimension if it does and does the machine actually use the info in CSP code to get some hidden tweaks for cutting values or is it for the user? I mean the barrel control is switched on in the BSA code on the cutting values. Sorry, i'm confused.

 

[Shane030173]

Not sure where you're getting bsa activating barrel control? BSA is your taper offset to compensate for wire wear from top to bottom of part. I have never adjusted these numbers. Barrel control is activated with CSP and the following #'s is your setting for it. TT is the top and TB is the bottom of your part. Also, if not needed you shouldn't be using sfcc. It can be turned off on your esprit parameter page. It will affect your finished part dimensions.

 

[Kimmo]

I looked it up in the Sodick manual. These are the three pages I followed.
This is where I also found the TLR, which I asked you guys about.
I think it is supposed to adjust more or less anti-barreling by percentage.
I hope it's not illegal to post manual pages