Flatshot Not to Scale????

[qball]

I have a 3d drawing and I use Flatshot command to output a 2d block. But the 2d block is not to scale!!

the attached pdf shows that the top rail which is supposed to be 38mm high, is 31.... it's actually 31 and some decimal places. This doesn't seem right.

 

edit: I should clarify that I used the navcube top corner for the perspective and I inserted the flatshot block with a scale of 1.

FLATSHOT.pdf

[SuperCAD]

I can't open the file right now, but if you're flatshot is of a isometric view then it won't be to scale.

 

What you can do is take the dimension that it SHOULD be, and divide it by the dimension you get from the iso. This will be your scale factor. Set up a new dimension style and you can use the scale factor to adjust your dimensions. Let me know if that doesn't make sense and I'll post a better tutorial later tonight.

[qball]

oh, I think I just clued in. I thought the vertical line should be the actual dimension. But I am confusing isometric 2d drawing and 3d projection.

[mkweaver]

When I do isometric flatshots I scale the resulting block using "reference". After I do the first flatshot I always use "replace existing block" so I don't have to mess with the scale.

[SuperCAD]

The scale factor that you want is 1.224744871533178. Create a new dimension style called Isometric (or whatever flavor you like) and just copy that and paste it into the scale factor box on the modify dimension style box under the "primary units" tab. Now your isometric views can be scaled.

 

I would still show the iso as NTS so some idiot won't think to take a ruler to it and try to measure it himself.

[ReMark]

Who dimensions perspective drawings in the first place? They're just pretty pictures. No one should be building anything off of them anyway.

[mkweaver]

Who dimensions perspective drawings in the first place? They're just pretty pictures. No one should be building anything off of them anyway.

I agree with you regarding perspective drawings, but it is quite common to dimension isometrics.

[ReMark]

Yes, I agree...it is common to dimension isometrics but the OP used the word "perspective". Thus my reply.

[mkweaver]

Yes, he did say it was a perspective, but he said he got there from the corner of the navcube, which would give him an isometric.

[ReMark]

Yes, you are correct. I should not have taken him so literally.

[CADkitt]

Will Autocad users ever learn not to scale stuff.

Use viewports.

[ReMark]

Will Autocad users ever learn not to scale stuff.

 

Short answer: No.

 

Not while we have some users still passing along bad habits.

[mkweaver]

Will Autocad users ever learn not to scale stuff.

Use viewports.

Using a viewport in this case will not solve the problem because the block created by flatshot is not scaled correctly as an isometric.

 

If this is a "bad habit" I would like to hear the correct way to deal with this.

[SuperCAD]

Correct me if I'm wrong, but I think they meant a "bad habit" is messing with the scale of the modelspace drawing so it will print at a specific scale rather than leaving it as a 1:1 ratio and using a viewport to adjust the scale.

[CADkitt]

Okey I see I correct myself:

When will autocad itself learn not to scale flatshots.

srry for the wrong accusation.

[ReMark]

Yes, I was referring to scaling entities in model space (the old way). Try not to read more into my posts than I meant. Thanks.