How to place a pad?

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PelegS
Posts: 21
Joined: Wed Apr 10, 2019 7:21 am

How to place a pad?

Post by PelegS »

Hello,
I couldn't figure out how do I place a pad at a specific place.
Regarding the attached screenshot, I wanted to move the highlight pad in the x axis. I've also tried to create a new body to sketch this pad in, but couldn't create an edge link in the sketch, to the exiting body sketches.
I've also attached the FreeCAD project.
Thanks
Attachments
how-to-move-pad.png
how-to-move-pad.png (109.04 KiB) Viewed 2517 times
c13-power-splitter.fcstd
(44.98 KiB) Downloaded 94 times
openBrain
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Re: How to place a pad?

Post by openBrain »

Actually you have to move the sketch accordingly, not the pad. A good way is to select the sketch in the treeview then modify its placement property.
IIRC the Z axis is always normal to sketch. ;)
chrisb
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Re: How to place a pad?

Post by chrisb »

The image suggests that you should not move the sketch directly, but rather change its attachment.

This might be a bit tricky:
It is intriguing to attach the sketch to the appropriate face.
However this is not recommended, because you loose stability in terms of topological naming issues.

A proper way would be to attach a DatumPlane to Sketch, and then place Sketch003 on that DatumPlane.
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
PelegS
Posts: 21
Joined: Wed Apr 10, 2019 7:21 am

Re: How to place a pad?

Post by PelegS »

Thanks openBrain and chrisb,
openBrain wrote: Fri May 03, 2019 1:34 pm Actually you have to move the sketch accordingly, not the pad. A good way is to select the sketch in the treeview then modify its placement property.
IIRC the Z axis is always normal to sketch. ;)
I've tried that, Placement -> Position -> x can't be changed (see screenshot)
chrisb wrote: Fri May 03, 2019 4:01 pm A proper way would be to attach a DatumPlane to Sketch, and then place Sketch003 on that DatumPlane.
I didn't found how to set the DatumPlane x offset (see screenshot)
Attachments
how-to-position-plane.png
how-to-position-plane.png (51.32 KiB) Viewed 2458 times
pad-placement-problem.png
pad-placement-problem.png (28.2 KiB) Viewed 2458 times
kisolre
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Re: How to place a pad?

Post by kisolre »

If there is ATTACHMENT the PLACEMENT is derived from that. So you need to change attachments offsets (position x,y,z, axs, angle).
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NormandC
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Re: How to place a pad?

Post by NormandC »

  1. Select the Sketch
  2. Switch to the Data tab
  3. Select the "Map Mode" or "FlatFace" field
    FC_Sketch_Attachment_01.png
    FC_Sketch_Attachment_01.png (23.82 KiB) Viewed 2448 times
  4. Press the [...] button that appears
    FC_Sketch_Attachment_02.png
    FC_Sketch_Attachment_02.png (17.45 KiB) Viewed 2448 times
  5. Set the Attachment Offset values
    FC_Sketch_Attachment_03.png
    FC_Sketch_Attachment_03.png (71.37 KiB) Viewed 2448 times
PelegS
Posts: 21
Joined: Wed Apr 10, 2019 7:21 am

Re: How to place a pad?

Post by PelegS »

Thanks kisolre and NormandC!

That worked, because I changed the Z axis value, in contrast to the previous attempt, which I changed the X axis :? . I understand now that the attachment offset axis are relative to the sketch and not absolute, that’s a bit confusing.
kisolre
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Re: How to place a pad?

Post by kisolre »

PelegS wrote: Sat May 04, 2019 6:13 pm relative to the sketch and not absolute, that’s a bit confusing.
Imagine the sketch as an actual drawing on a paper - X is left-right, Y is bottom-top, Z is up from the sheet towards you.
PelegS
Posts: 21
Joined: Wed Apr 10, 2019 7:21 am

Re: How to place a pad?

Post by PelegS »

kisolre wrote: Sat May 04, 2019 6:46 pm
PelegS wrote: Sat May 04, 2019 6:13 pm relative to the sketch and not absolute, that’s a bit confusing.
Imagine the sketch as an actual drawing on a paper - X is left-right, Y is bottom-top, Z is up from the sheet towards you.
Yes, I assumed a single axis system, Its clear now. Thanks.
chrisb
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Re: How to place a pad?

Post by chrisb »

I had another look at this model, and have some comments:

- Your Sketch contains redundancies: symmetry implies here the horizontal constraints. Usually you should remove the latter.
- I attached a DatumPlane to the sketch at the appropriate edge, this makes the offset obsolete
- I had to move the sketch to be aligned with the box again - and now you have to delete the symmetry anyway.
- I reversed the Pad in the attached example, that may be wrong.
Bildschirmfoto 2019-05-05 um 12.45.46.png
Bildschirmfoto 2019-05-05 um 12.45.46.png (15.68 KiB) Viewed 2369 times
Attachments
c13-power-splitter_cb.fcstd
(34.27 KiB) Downloaded 66 times
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
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