Michael 2 notice about Chamfer and Fillet:
1. When you type zero it not become zero. No reset.
2. When you select 2 distance and chose distance by mouse, first you select first distacne and it make the second the same. Nothing critical becouse you after that select second. But when you repeat action to set that distances once again it become a bit annoing thus when you change first the seond changing too. It will be good to change only first distance when you set it, and only change second when you set it.

And how measure work when angle is not 90? I measure one distance but chamfer or fillet is less than that distance.

Hi Andrei,

> 1. When you type zero it not become zero. No reset.

I've updated this for the next beta. If you update the attached file in your \commands folder then it should also work with the current v3 beta as well.


> But when you repeat action to set that distances once again it become a bit
> annoing thus when you change first the seond changing too. It will be good
> to change only first distance when you set it, and only change second when
> you set it.

The problem with that, is that would then result in different behavior between the first time you ran through it versus subsequent times, with the first time making a uniform equal one. That tends to be problematic to have changes in operating behavior like that.


> And how measure work when angle is not 90? I measure one distance but chamfer
> or fillet is less than that distance.

The distances that you enter are used as surface offset distances, they don't control the length of the chamfer surface itself.

Chamfers and fillets are formed by generating surface offsets and then intersecting those offsets with each other.

- Michael

Thanx for file! Could you more detail say what is surface offset distances? Or may be screen will be great. I just want to understand what I measure when setting distance by mouse.

Hi Andrei,

> Could you more detail say what is surface offset distances?

It's a surface that is a constant distance away from the base one, basically moved by the given distance along each surface normal, here's an example of a base surface and it's offset surface of a particular distance:



- Michael

If I understand right, moi make base fillet surface than offset it and make trim?

Hi Andrei,

> If I understand right, moi make base fillet surface than offset it and make trim?

No, the offset happens on the already existing surfaces on either side of the edge that's being targeted.

Like this:



Putting in a fillet of radius = 4 :



That means offsets like this:




The "rails" for chamfers are done in this exact same way as for fillets, it's just that instead of a rounded piece put in, a straight line is put in instead. When you use 2 chamfer distances it means each of those lines shown above uses its own separate offset distance rather than them both using the same one.

- Michael

Thank you very much for you explonation, now I understan it is offset from surface to radius point. And when I enter distance I enter that radius.

So for example with 2 chamfer distances of 4 and 3 it would be like this:





- Michael

Thank you Michael you are the best! :)

Hi Andrei,

> Thank you very much for you explonation, now I understan it is offset from surface
> to radius point. And when I enter distance I enter that radius.

Yup, that's correct. For an entire fillet surface that "radius point" is a centerline path curve, and it's formed by calculating the intersection between the 2 offset surfaces.

Then chamfers are done in the exact same way, which is kind of unfortunate in some aspects because there would probably be easier to understand ways to control it. But it's standard for CAD programs to deal with chamfers in the same way as with fillets, just with a straight surface put in rather than an arc put in for the cross section shape.

- Michael

My mistake was that I thought that I enter this distances:

Seems for a Chamfer you right!

> My mistake was that I thought that I enter this distances:

It would make sense to do it that way if it was restricted to only ever work on planar surfaces.

When each of those surfaces are curved surfaces rather than planar ones, then a measurement like you show there becomes difficult to deal with.

- Michael