Parallel milling issue with tool path

[d.zawada]

Hello everyone

I have problem with milling tool patch. When i select parallel operation and 9 same elements, first of them has only 3 passes (most on right)) but all other four. Correct is four passes, so for one element i need add extra pencil operation for correct milling. Other problem is as I can't change direction of milling, I want to change IN with OUT for better milling optimalisation but i can't find way to do this.
What am I doing wrong? All nine elements are exactly the same because they are created by pattern in designer.

I send image with problem as attachement.

[Anonymous]

Program first one and include all others in linear pattern.

[mattdlr89]

That's odd that the last one is not working out. If you reduce the tolerance does that fix it?

Otherwise it is possible to pattern toolpaths. You could just program one of those then pattern the toolpaths 8 times. 

You can select an entry point in the linking tab of the toolpath see image below. 

[d.zawada]

When I decrease the tolerance (increase the value if I understand correctly) the faulty part is milled correctly but some other parts are wrong. The linear pattern can solve my problem, but still can't change the tool input and output in one element. With multiple items on one handle it is important to keep entry and exit on the other side to reduce "blank" movements.

Is there any way to modify the path after computation?

[mattdlr89]

I'm not quite sure I follow with your entry and exit points? The exit will be a function of the stepover size but you should be able to define the entry. You can also set the toolpath to 180 degrees orientation if you need it to approach from the other side.

Perhaps it would be helpful to split it into multiple parallel operations if you need different entry and exit points on each component.

[HughesTooling]

I've noticed this problem with parallel and come to the conclusion the stepover starts in the first pocket and if the other pockets are at a pitch the stepover doesn't fit into the pattern gradually shifts in each pocket. So as others have said, if possible create a operation for the first pocket and pattern or you need an operation for each pocket.

Mark

[HughesTooling]

I think you can see the shift in your picture but might be an optical illusion.

In the left hand pocket there's a bigger gap on the left, near the middle it's about equal then the bigger gap moves to the right.

[d.zawada]

Hi everyone. I didn't solve my problem by using multiple pockets in parallel. Eventually, I prepared a nearly valid path for the first item and used a pattern. Then I prepared it for the next elements on my device and applied the order of milings in the nested layout. Finally I have achieved almost what I want, which is close to optimal.