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Need help Control Cutter Comp with the Rolldie.dll


Brute440
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Good morning guys, I am working on a project where I need to engrave a rectangle in to a cylinder substituting the Y for A movements. I am using a tapered end mill in a Mazak VCN with a 4th axis. I have the shape drawn in the flat plane and am using the rolldie.dll with the axis substitution. The problem is using when "control" cutter comp the end mill sits down on the tool path and doesn't offset (or turn on G41). It goes down the center of the geometry and will scrap the part out. 

 

When I create the tool path with out the rolldie.dll and just use the axis substitution the endmill sits down on the geometry (no G41) and makes an S move to the wrong side of the geometry and then when the A starts to roll the end mill comes back to the correct side of the rectangle and is continues along on the correct side of the geometry. I am kind of stumped as to what I am doing wrong. 

 

Does anyone have any advice for using Control cutter comp with the rolldie.dll? I need some advice badly!

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Why is rolldie still a dll? It seems to me that chooks should be used only as a testing application. Once they are proven MC should add them to the operations. And, you do see I state ONCE THEY ARE PROVEN. MC has a real bad habit of adding unproven "features" to the operations.

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Lets see if these screen shots work/help.

 

Here is the geometry I am using to get the bugs worked out. It is just an 1 1/2" rectangle with 1/8" corners and a 3/4" arrow inside of it. I offset a tool path to rough it in an pocket the shapes out.  Then i offset contour the geometry .0008 and rounded the sharp corners off of the arrow. 

 

The S move is in Mastercam and the Mastercam Verify matches what the machine does very closely. I have the stock to leave at .004 because I want the rectangle that needs to be engraved to be about .008 thick at the top when I am done with it.

 

I will look in to using "wear" because, that sounds like the best of both worlds. I can get it to work when using "computer" but, it doesn't give me the G41 that i need at the machine. If "wear" will give me the G41 that I need I will use it. 

 

post-66397-0-33387000-1453227912_thumb.jpg

 

I back plotted the tool paths and I am obviously missing something some where.

post-66397-0-68654400-1453228172_thumb.jpg

 

When I verify the tool paths you can see what I mean about the S shaped tool path. It sits down on the geometry then moves to the wrong side of it and back through it to where it should be. 

post-66397-0-84133900-1453227914_thumb.jpg

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turning off (set to zero)the helix height and ramp height on the entry side, in op3, yielded a full knife edge.

 

if that is what you are looking for

I changed the ramp and helix height to zero and it looked exactly how I wanted it to. But... when i post the code it does some funny stuff. Looks like I am not allowed to upload an EIA file? 

 

Check out the attached pic of what the attached program does. It sits down on the right side and makes a lateral move through the blade then rolls the A and jumps through the blade at every corner radius. We stopped it before it went too far. I am kinda ready to pull my hair out.

N326289.mcx-9

post-66397-0-49591400-1453240031_thumb.jpg

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i've experience some crazyness between the verify and the code using these toolpaths with X3/x4 so it was a while ago. My solution at the time was to breakup entities along the y axis. So instead of one long line between you corner radii, break it into several smaller sections. This is just a wild guess (without looking at the code).

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you can cut and paste the code in your reply, easy enough

I didn't think of that! Thanks,

 

(N326289)

(DATE=DD-MM-YY - 19-01-16 TIME=HH:MM - 14:36)
(MCX FILE - I:\PROG\DLK\NCWORK\MCX\N326289.MCX-9)
(NC FILE - I:\PROG\DLK\NCWORK\BD\N326289.EIA)
(MATERIAL - STEEL INCH - 1030 - 200 BHN)
(T1|.210 ROUTER|H1|D1|TOOL DIA. - .148)
(T2|.120 ENGRAVER|H2|D2|TOOL DIA. - .148|CONTROL COMP|XY STOCK - .005|Z STOCK -)
N1 G20
N2 G0 G17 G40 G49 G80 G90
N3 T1T2 M6
N4 G0 G90 G54 X3.265 Y0. A180. S24000 M3
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N6 M46
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N232 X2.8501 F70.
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N389 X2.641 F70.
N390 A172.857 F2000.
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N393 X2.641 F70.
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N395 X2.3743 F70.
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N398 X2.4167 A179.67 F1929.6
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N400 X2.437 A180.787
N401 X2.4441 A181.429
N402 X2.641 F70.
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N407 X2.4283 A186.059
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N410 X2.641 F70.
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N412 X2.3367 F70.
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N414 X2.641 F70.
N415 A195.715 F2000.
N416 X2.2018 F70.
N417 X2.1344 A198.572 F2000.
N418 X2.641 F70.
N419 A201.429 F2000.
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N423 X2.4408 A185.183
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N429 X2.4309 A180.374
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N431 X2.4029 A179.188 F1938.
N432 X2.3857 A178.767 F1495.9
N433 X2.367 A178.479 F1016.5
N434 X2.3474 A178.333 F513.9
N435 X2.3276 F70.
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N438 X2.2721 A179.188 F1499.9
N439 X2.2569 A179.727 F1933.2
N440 X2.0979 A186.459 F2000.
N441 A178.571
N442 X2.3007 F70.
N443 X2.2848 A178.862 F1180.8
N444 X2.27 A179.25 F1581.9
N445 X2.2569 A179.727 F1963.9
N446 X2.2167 A181.429 F2000.
N447 X2.0979 F70.
N448 A184.286 F2000.
N449 X2.1492 F70.
N450 X2.0979 A183.758 F701.7
N451 A166.35 F2000.
N452 X2.0962 A165.511
N453 X2.091 A164.698
N454 X2.0826 A163.936
N455 X2.0712 A163.246
N456 X2.0572 A162.651
N457 X2.0409 A162.168 F1721.6
N458 X2.0229 A161.813 F1261.1
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N463 X1.9269 A162.168 F1261.3
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N465 X1.8966 A163.246 F2000.
N466 X1.8852 A163.936
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N468 X1.8716 A165.511
N469 X1.8699 A166.35
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N471 X1.7126 A179.795 F701.1
N472 X1.711 A179.727 F2000.
N473 X1.6972 A179.231 F1951.6
N474 X1.6817 A178.832 F1558.4
N475 X1.6649 A178.542 F1128.
N476 X1.6473 A178.368 F674.1
N477 X1.6292 A178.315 F203.9
N478 X1.6112 A178.384 F267.5
N479 X1.5936 A178.571 F723.6
N480 X1.359 F70.
N481 A181.429 F2000.
N482 X1.5238 F70.
N483 X1.5189 A182.124 F2000.
N484 X1.5166 A182.843
N485 X1.5168 A183.569
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I have been pulling my hair out trying to figure out what I am doing wrong. I jogged the tool above the part and reran it then I noticed... When it is running Tool 1 where it roughs the shape out they Y stays at 0.

 

It should always be at 0 over the centerline of the roll. 

 

When tool 2 starts, G41 comes up, the 4th rotates and when it gets to the first radius on the rectangle the Y axis jumps .100 then when it gets to the next radius the Y jumps to -.100 and it does this on all 4 radius of the rectangle. What in the world will cause the machine to .200 when it isn't in the code?!?!?!

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The Rolldie tool path was never designed to support Cutter Compensation. That is because the output is Vector Based, not 2D path based. The output is simply Tool Positions, which the post processor then resolves to give you the XYZA output.

 

The path itself does not contain enough information to correctly calculate Cutter Compensation data. For any tool path that includes simultaneous 4th axis motion, you should be using 3D Cutter Comp, not just 2D cutter comp. 3D cutter compensation output looks like a G1 move, but in addition to XYZ, you also output a "compensation vector", in IJK format.

 

My recommendation is to simply measure your actual Tool Diameter, and program with that tool size. Forget trying to make cutter comp work with this tool path. It was never designed to support it.

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