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by DeepSOIC
Mon Mar 18, 2019 2:44 pm
Forum: Help on using FreeCAD
Topic: Black view 3d model in freecad (черный цвет модели в FreeCAD)
Replies: 2
Views: 50

Re: Black view 3d model in freecad (черный цвет модели в FreeCAD)

Also try. Edit->Preferences->Display tick "Enable backlight color", and pick some non-black color for the backlight. Set intensity to max. If the models get this color, it usually means the models have face normal out of sync. But it only happens with seriously broken models, it can't happen for "ev...
by DeepSOIC
Mon Mar 18, 2019 2:40 pm
Forum: Help on using FreeCAD
Topic: Black view 3d model in freecad (черный цвет модели в FreeCAD)
Replies: 2
Views: 50

Re: Black view 3d model in freecad (черный цвет модели в FreeCAD)

I would suspect graphics driver first.

Try resetting your preferences: open Edit->Preferences, click "reset" button in lower left corner of the window. Restart FC.
by DeepSOIC
Sun Mar 17, 2019 4:33 pm
Forum: Users Showcase
Topic: Designing a dome faceted loudspeaker
Replies: 20
Views: 1310

Re: Designing a dome faceted loudspeaker

jeno wrote:
Sun Mar 17, 2019 3:41 pm
is the speaker on the picture a 5" Focal?
Nope. It's R2R Audio's one, made here in saint-petersburg, by a few guys in a small lab (almost a garage).
by DeepSOIC
Sun Mar 17, 2019 2:39 pm
Forum: Users Showcase
Topic: Designing a dome faceted loudspeaker
Replies: 20
Views: 1310

Re: Designing a dome faceted loudspeaker

jeno wrote:
Sun Mar 17, 2019 11:09 am
at 1.7 khz. Could also be a deflection effect (wavelength around 20 cm, means an obstacle or a edge 10 cm away for speaker center).
It might very well be it. I have an edge 12 cm off center.
WP_20190304_19_52_05_Pro_reduced.jpg
WP_20190304_19_52_05_Pro_reduced.jpg (509.08 KiB) Viewed 62 times
by DeepSOIC
Sun Mar 17, 2019 2:18 pm
Forum: Users Showcase
Topic: Designing a dome faceted loudspeaker
Replies: 20
Views: 1310

Re: Designing a dome faceted loudspeaker

What do i mean with coupling? The membran of the speaker is a moving mass. Therefore forces work on the chassis and your PLA/ABS cabinet. You can try to separate the speaker from the cabinet with some elastic material to eliminate or in reality reduce the transfer of forces. OK, I understand now. T...
by DeepSOIC
Sun Mar 17, 2019 9:32 am
Forum: Users Showcase
Topic: Designing a dome faceted loudspeaker
Replies: 20
Views: 1310

Re: Designing a dome faceted loudspeaker

If you compare the frequency measurements on axis to 45 degree you'll see it. I see that it begins at 10k. The drop of my concern begins at 2k. That is a heck of a difference. Although, I didn't measure the driver alone at more extreme angles, that may play a role here. in which way did you wire th...
by DeepSOIC
Sat Mar 16, 2019 11:37 pm
Forum: Open discussion
Topic: Alternatives to FreeCAD
Replies: 8
Views: 410

Re: Alternatives to FreeCAD

Sketchup is used a lot in the furniture making community. Last I tried it some years ago, it was pretty easy to install it on Linux using WINE. I think there is a problem. Apparently, there is no free installable sketchup anymore, free is only browser-based. Or I am missing the link. (I was asked t...
by DeepSOIC
Sat Mar 16, 2019 4:47 pm
Forum: Users Showcase
Topic: Designing a dome faceted loudspeaker
Replies: 20
Views: 1310

Re: Designing a dome faceted loudspeaker

for measuring sound response check https://www.roomeqwizard.com/ this. thanks, I know. Now, finally, my laptop is back (they failed to clone the drive, but at least nothing was screwed up). Here comes the science! This is the frequency response of the drivers I used, in an infinite-ish baffle (embe...
by DeepSOIC
Sat Mar 16, 2019 9:34 am
Forum: Help on using FreeCAD
Topic: Copying without losing links
Replies: 8
Views: 135

Re: Copying without losing links

maybe this one: issue #0002766
and it's not fixed, and seems related.
by DeepSOIC
Sat Mar 16, 2019 9:25 am
Forum: Help on using FreeCAD
Topic: Copying without losing links
Replies: 8
Views: 135

Re: Copying without losing links

AFAIR there was a bug, where when copying both Box and Torus, the new torus would link to old Cube even though the cube is copied. If it was fixed, this problem might be a regression of the fix.

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