Scale, but keep same diameter items

Scale, but keep same diameter items

atrueresistance
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Message 1 of 6

Scale, but keep same diameter items

atrueresistance
Enthusiast
Enthusiast

I goofed, and didn't calibrate the image before I started modeling. Is there a way to scale, but still leave the holes the same diameter? When using the scaling operation, they seem to become indepent from the sketch. 

 

It's about 20" tall, and needs to be around 12"

 

Pretty new to modeling still. 

 

http://a360.co/1XnfWqZ

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Message 2 of 6

HughesTooling
Consultant
Consultant

I was going to suggest going through each sketch and replacing the hole dimension with a parameter, then scale the model by 0.6 and change the parameter for the holes to 0.26166 but it doesn't work because there isn't room for the holes after scaling.

Capture04.PNG

 

I've modified sketch8 to give you an example, looks like you were a bit lazy and had not set a dimension for the holes!

Clipboard02.png

 

I don't know if you'll be able to modify the sketches to make everything fit again, good luck. I've attached the file, your best bet is to suppress the scale feature at the end of the time line and go through each sketch, add equal constraints to the holes then add a dimension using the HoleDia parameter.

 

Mark

Mark Hughes
Owner, Hughes Tooling
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Message 3 of 6

atrueresistance
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Clearly I don't know what I'm doing, even after watching Autodesk's F360 youtube videos. Setup parameters and this is what I get. 

 

 

So I have the sketch fully dimensioned with parameter based values.

 

sketch

 

 

OK hole size works.

hole size

 

 

So change the spacing. This is the parameter given between the all the holes. . . . Not quite sure what is going on

spacing

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Message 4 of 6

atrueresistance
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Enthusiast

Here is another example if I just include the bottom pieces. The spacing is changed correctly, but the circles shift in angles not square like intended. 

Untitled.png

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Message 5 of 6

HughesTooling
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Consultant
Accepted solution

Here's a few pointers.

 

First I'd draw 3 circles then draw a line between centres of 2 of them.

Capture.PNG

 

Then add a mid point constraint and equal constraints for the diameters.

Capture04.PNG

 

Next add a coincident constraint to your path and may be a horizontal or perpendicular as well. You can add the dimensions at this point, I'd use the scaled up sizes rather than change them after.

Clipboard02.png

 

You also have the option to create rectangular arrays in a sketch, you can use parameters for the spacing.

Clipboard01.png

 

You also have the option of a pattern on path, you can draw the path in the same sketch as the holes. After extrude\cut to make the holes you'll need to turn the sketch back on to use the path curve. I've used a perpendicular constraint and coincident to align the holes to the path.

Capture5.PNG

 

 

After cutting the first set of holes use Pattern on Path from the Modify menu. For the pattern type select Feature and select the Extrude feature from the time line.

Clipboard03.png

 

Mark

Mark Hughes
Owner, Hughes Tooling
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Message 6 of 6

atrueresistance
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That worked perfectly, but I did end up redoing it. I used the midpoint and other various constraints. Never knew that was an option. I learn something new every day. Thank you so much for your help.Screenshot_2015-11-29-03-58-16.png

Screenshot_2015-11-29-03-58-40.png

 

Screenshot_2015-11-29-04-01-47.png

 

Screenshot_2015-11-29-04-01-55.png

Screenshot_2015-11-29-04-02-09.png

 

To think it all started as this.

Screenshot_2015-11-29-04-02-22.png

 

 

And it all started as that, amazing how technology changes things.

 

 

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