nesting efficiency

[eladm]

Hi

What is the different between efficiency and nesting efficiency

this part have area of 335145mm^2 

5 parts = Area 1,675,725 mm^2 , the sheet 2400*1400=3360000 mm^2

1,675,725/336000 * 100 = 49.87 %

How can I increasing without change the packaging or part?

Change the frame width and item separation and the trim(left/right/top/bottom) not help

[phillip.doup]

Hello @eladm,

The difference between the two efficiencies reported are that one is accounting for holes in the parts, the other is not. If you have parts with no holes in them, it should report the same for both. Here's an example of two 500mmx500mm parts, one with no holes and another with a 100mmx100mm hole, each nested independently on a 1000mmx1000mm sheet.

Note the 1% difference in the second image is because of the 100mmx100mm hole, which is overall 1% of the area of the entire plate.

The second issue is related to the first one, since the area you see does not have the holes subtracted from it, but rather is the overall footprint of the part.

[phillip.doup]

Not sure why my images didn't make it in the previous post, so here they are: 

Part without hole, resulting in 25% consumption

Part with hole resulting in 24% consumption

[eladm]

Hi

Why if he have the hole in a part the efficiency is decrease , isn't the efficiency need to be bigger than nesting efficiency? we use less material 

efficiency is the ratio of the area (parts/sheet) ? 

Why we need 2 efficiency ?

[phillip.doup · Accepted solution]

@eladm,

This is exactly why there are multiple efficiencies you can choose to use. In the case of the lower efficiency, this is a "true" efficiency in that it is the area of the part minus any material that is wasted, which includes the holes. The higher efficiency number is a situation where you don't consider the holes waste, because it's unavoidable. We provide multiple options on efficiency because you may care about one or the other depending on what kind of material you have, how the waste and remnants are handled, etc. There are actually 4 different efficiencies, with 2 of them involving the remnant material. If you consider that the remnant material is not waste, then the efficiency is much higher. We provide all of these options so that you can determine which efficiency is best for you. If you're not saving the remnant, then the non-plate efficiency is more appropriate, which are the two that you are looking at.

Again, we provide all of these different options just to make it so you can see whatever number you need to see.