1ko

I have to design several wood boxes who will be bases for acrylic showcase boxes. They have all different sizes but the construction is the same and quite simple. So what I'm looking to do is to design a generic construction with constraints once, and then be able to change a few variables like the boards thickness, the thickness of the acrylic and the width height length of the box and I would get the dimensions of my wood boards to do the cutting.

I never used the assembly workbenches, can they be useful in my cases?

I'm working on a tray drawer (for the curious, it's for the Tesla Model Y front center box). Using FreeCad 0.22 dev, the model will be 3D printed.

With your help I could made it how I wanted. However as I'm a beginner with FreeCad, there's a lot of ugly things. So I wanted to work on this new iteration and clean it up as much as possible, mainly to learn the software.

I have 1 major problem: I can't make a loft between my to sketches to create the separators. And I don't understand why.

Another point I do not fully understand is the construction lines. Should I use the External Reference or a Carbon Copy ? I don't really like the carbon copy as there's to much things displayed and sometimes I'm lost and don't see my original sketch anymore. For example, my bottom separator sketch must be linked somehow to my bottom box sketch, so if I change the position of the bottom of the box, the separator will adjust automatically.

Here's an image of how the model should look (my previous iteration) https://imgur.com/a/H8on1MZ

and here's he file I'm currently working on. license CC0 1.0 (you can do whatever you want with it) https://drive.google.com/file/d/1WSgCSVhF1Io7ynhOXDkcO1hc8piln_mg/view?usp=sharing

I'm new to freecad, so far I made it this way :

Sketch a rectangle for the top surface, pad it, add filets for the corners. Then select to bottom face, make a new sketch, another rectangle, then a datum plane 40mm below, sketch another smaller rectangle, and make a loft between the two to create the bottom of the tray.

Now for the hole I made a rectangle on the top face and made a pocket with an angle.

Downside of this, the thickness of the walls is not equal. Ideally I'd like a 1.5mm thickness everywhere. And I'm not really sure how to proceed to make the separators inside the tray.

What is the most efficient way to do it? thanks

Earlier this year I bought a new Denon AVR-X1700H. I was happy with it, but after a month I noticed it produced a humm when I turn it on. It's only noticeable when the room is near silent, but it's really annoying when you notice it.

After investigation, it's coming from inside the device, I guess from a coil or transformer. I disconnected all sources and all speakers and it's only coming from inside the enclosure. It's silent when on standby mode (red led) and can be heard as soon as I turn it on (green led).

Spectrogram of the noise:

https://imgur.com/a/oaBrRhK first click is the first relay when the device is turned on, the 200Hz humm is here. Then comes the second relay. Then I turn the device off, both relays are clicking again and then the 200Hz humm is gone.

sound file:

http://sndup.net/ns947

I contacted my local dealer after sale service describing them in details the problem. they were not responsive. after a second email they accepted I send it back for service. (after telling me there would be fee is my claim is bogus). I quickly received the device back without any explanations about what was done. Only a List of replacement part serial numbers, they apparently replaced the main transformer.

Unfortunately, once plugged in, the problem was still the same. I contacted the service again, and I was told the noise they detected was "within the normal range" and "that this hum comes from the customer's network (ripple control pulse)."

None of my other sound devices are making this kind of noise at home. I tried to connect the AVR to another socket in another room, same result. I even tried to disconnect all the electrical devices in my flat (even the fridge, the dishwasher, the cooker and the internet box) and I still have the same result.

Could someone tell me, by the files I uploaded above, If I'm extremely sensitive or if there's indeed something wrong with my device ?

I have this old pair of Technics SB-3130, they are three way speakers. Both of the super tweeters are dead (infinite resistance) and I’m not sure if this impact the range of frequency feeded to the tweeter. Given the schematic diagram, if I remove the super tweeter, should I modify something to have all the high frequencied on the tweeter?

I have this old pair of Technics SB-3130, they are three way speakers. Both of the super tweeters are dead (infinite resistance) and I'm not sure if this impact the range of frequency feeded to the tweeter. Given the schematic diagram, if I remove the super tweeter, should I modify something to have all the high frequencied to the tweeter?

At home my PCs have CIFS/SMB shared folders, it's handy and simple to use. However I can't find an Android app capable of browsing these shares.

There's Android Samba client and CIFS Document provider on F-droid but both require to know the exact IP and path, you can not just browse the network like on a PC.