Multiple datum planes and sketches

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HBC0
Posts: 185
Joined: Wed Sep 23, 2015 5:44 pm
Location: MRN(Germany)

Re: Multiple datum planes and sketches

Postby HBC0 » Wed Jul 17, 2019 9:23 pm

scrungy_doolittle wrote:
Mon Jul 15, 2019 2:01 am
1. How do I create 10 dataum planes, all connected at one edge, and all n the same plane.
2. How do I put a sketch onto one plane?
hello

I think you once did it this way.

1) First you need a sketch like this.
ring_skizze02 0.png
ring_skizze02 0.png (10.66 KiB) Viewed 371 times

- open the PartDesign WB
- create a body
- create a sketch on the xy plane

IMPORTANT!
The circle in the sketch is made up of arcs. Number of arcs equal to the number of DatumPlanes.
ring_skizze01 0.png
ring_skizze01 0.png (12.18 KiB) Viewed 371 times
- set all constraints, except the angles of the construction lines.
- click close

2) Placing the DatumPlanes

- select the first arc in the 3D view.
- use the button to create a DatumPlane.
- Attachment mode, select "Frenet NB"
- click OK
DatumPlane 0.png
DatumPlane 0.png (51.54 KiB) Viewed 371 times
Repeat this for the rest of the DatumPlanes.
(Aperture the first created DatePlans one by one with space bar off)

3) Place imported/copied/duplicated sketch.

The sketches must be inside the Body. (drag and drop)
- choose a sketch
- click on MapMode in the DataTab, then on the button with the 3 points, see picture
- click the appropriate DatumPlane in the 3D view.
- click on OK.
- ……….
-………
MapMode01 195.png
MapMode01 195.png (10.75 KiB) Viewed 371 times

Now you can connect the sketches with the Sweep tool.
(Try the best order. )
Then you can move the DatumPlanes / Sketches over the construction lines into Sketch, this also changes the shape of the sweep.
When everything fits, the first sketch will fully constrain (angle constraints).
Then you can change the diameter of the ring if needed.

I hope it is understandable, English is not my native language and I use a translator.

Here is my file.
Created with Freecad 018.16117
ring_177_tut_001.FCStd
(331.59 KiB) Downloaded 15 times


Bruno
HBC0
Posts: 185
Joined: Wed Sep 23, 2015 5:44 pm
Location: MRN(Germany)

Re: Multiple datum planes and sketches

Postby HBC0 » Wed Jul 17, 2019 9:26 pm

............ and a last Picture.
ring_final 0.png
ring_final 0.png (59.7 KiB) Viewed 370 times
scrungy_doolittle
Posts: 121
Joined: Thu Jun 21, 2018 11:15 pm

Re: Multiple datum planes and sketches

Postby scrungy_doolittle » Sun Dec 29, 2019 12:42 am

Thank you.
I sill work with this for a while.
I think it is almost right, assuming I can move the angles around.
So given that I am in sketcher, and can see the sketches, how do I alter the angles of the datum planes to get a different shape?
chrisb
Posts: 29066
Joined: Tue Mar 17, 2015 9:14 am

Re: Multiple datum planes and sketches

Postby chrisb » Sun Dec 29, 2019 1:53 am

You don't do that in Sketcher, you do it in the AttachmentOffset or the edit dialog of the DatumPlane.
A Sketcher Lecture with in-depth information is available in English, auf deutsch, en français, en español.
scrungy_doolittle
Posts: 121
Joined: Thu Jun 21, 2018 11:15 pm

Re: Multiple datum planes and sketches

Postby scrungy_doolittle » Sun Dec 29, 2019 2:48 pm

chrisb wrote:
Sun Dec 29, 2019 1:53 am
You don't do that in Sketcher, you do it in the AttachmentOffset or the edit dialog of the DatumPlane.
I've been trying to find the dataum plane dialog and the attachment offset.
I think there should be a menu that opens up the datum planes, but I haven't found it yet.
Specifically
1. how do I get to the datum plane dialog that will allow me to alter the angles of the datum planes.
2. once I have them altered, I need to be able to see what the result looks like, how do I get that turned on.3. Once that is done, how do I alter the cross section sketches to change the shape of them on each datum plane, and yet keep them aligned?

O.K. I managed to edit a sketch. In this case it is sketch 1, which I widened to 15 mm which is what the ring should be.
In sketcher I can see the altered sketch, but the ring body has not changed.
What do I need to do to make the sweep happen again, or cause the change in the sketch to be recomputed for the ring body?
chrisb
Posts: 29066
Joined: Tue Mar 17, 2015 9:14 am

Re: Multiple datum planes and sketches

Postby chrisb » Sun Dec 29, 2019 6:16 pm

scrungy_doolittle wrote:
Sun Dec 29, 2019 2:48 pm
1. how do I get to the datum plane dialog that will allow me to alter the angles of the datum planes.
Double click on the datum plane (double click is the common way to enter the standard editing operation)

2. once I have them altered, I need to be able to see what the result looks like, how do I get that turned on.
In case it is not done automatically you can recompute the model

3. Once that is done, how do I alter the cross section sketches to change the shape of them on each datum plane, and yet keep them aligned?
If you have properly aligned your sketch it should update automatically. It may happen due to Topological Naming Project issues, that you have to reattach/reorient sketches after changes to previous steps.
A Sketcher Lecture with in-depth information is available in English, auf deutsch, en français, en español.
scrungy_doolittle
Posts: 121
Joined: Thu Jun 21, 2018 11:15 pm

Re: Multiple datum planes and sketches

Postby scrungy_doolittle » Wed Jan 01, 2020 4:52 pm

chrisb wrote:
Sun Dec 29, 2019 6:16 pm
scrungy_doolittle wrote:
Sun Dec 29, 2019 2:48 pm
1. how do I get to the datum plane dialog that will allow me to alter the angles of the datum planes.
Double click on the datum plane (double click is the common way to enter the standard editing operation)

How do I find the datum plane to start with?


2. once I have them altered, I need to be able to see what the result looks like, how do I get that turned on.
In case it is not done automatically you can recompute the model

3. Once that is done, how do I alter the cross section sketches to change the shape of them on each datum plane, and yet keep them aligned?
If you have properly aligned your sketch it should update automatically. It may happen due to Topological Naming Project issues, that you have to reattach/reorient sketches after changes to previous steps.
scrungy_doolittle
Posts: 121
Joined: Thu Jun 21, 2018 11:15 pm

Re: Multiple datum planes and sketches

Postby scrungy_doolittle » Wed Jan 01, 2020 5:01 pm

IMPORTANT!
The circle in the sketch is made up of arcs. Number of arcs equal to the number of DatumPlanes.

ring_skizze01 0.png

- set all constraints, except the angles of the construction lines.
- click close

>>>> has 6 degrees of freedom. <<<<<<

2) Placing the DatumPlanes

- select the first arc in the 3D view.
Selected Part Design.
Clicked on one segment.

Can't find a button to create a Datum plane, or to alter it.
Looked in Data pane
all it shows is Placement and constraints, and those are numbers.
The view plane is no better.

- use the button to create a DatumPlane.
- Attachment mode, select "Frenet NB"
- click OK
chrisb
Posts: 29066
Joined: Tue Mar 17, 2015 9:14 am

Re: Multiple datum planes and sketches

Postby chrisb » Wed Jan 01, 2020 7:56 pm

Your quoting in the second last post got out of whack. Please quote only the essential part of a post, not everything.

If you cannot find the icon, you can look in the PartDesign menu where you find the entry "Create a datum plane" accompanied by the corresponding icon.
A Sketcher Lecture with in-depth information is available in English, auf deutsch, en français, en español.
scrungy_doolittle
Posts: 121
Joined: Thu Jun 21, 2018 11:15 pm

Re: Multiple datum planes and sketches

Postby scrungy_doolittle » Wed Jan 01, 2020 9:54 pm

chrisb wrote:
Wed Jan 01, 2020 7:56 pm
Your quoting in the second last post got out of whack. Please quote only the essential part of a post, not everything.
I tried, but don't remember how...