For Xmax, the woofer is +-5mm and the PR is +-10mm.
Therefore, there is no significant problem with sound pressure.
I attached the result of the enclosure simulation.
A 30hz high pass filter is applied and achieves 95dB at 5.4V.
Ah right, that changed quite a bit.
I also just noticed the limited cone excursion of the woofer itself.
Btw, keep in mind that a PR's given cone excursion is theoretical.
Like any other driver, the compliance/stiffness isn't linear. Kms(x)
Finally got my 3D printer up and running. First print...the model cat included with the printer. Second print, Augerpro 4-inch SB21 waveguide. Printed in PLA, sanded, filler primer, Krylon flat black textured spray paint, sanded lightly with 800 grit, Krylon flat clear.
I used this filler primer because I had it, but I don't really like it. I used PLA filament because it was my first test prints and it turned out fine, but I've been getting better trying different print settings and ABS, I may try PLA+ soon.
PLA+ is 99% the same as PLA in terms of printing it. I've been told ASA is easier than ABS and basically the same properties wise. Carbon fiber PETG is also popular for ease of printing and good mechanical properties.
I've gotten really good prints with Polymaker ASA on my Ender 3 Pro with BTT mobo and MicroSwiss hotend. I also use the Creality enclosure.
Use PU glue, it's very good (although it cures slow) and less toxic than epoxy glue.
I made a motorized turn table and measured the directivity of woofer and tweeter.
I will simulate the crossover using vituixCAD soon.
Here some pictures and videos of my measurement setting.
I really satisfied with this smooth horizontal directivity.
I will simulate the crossover using vituixCAD soon.
Here some pictures and videos of my measurement setting.
I really satisfied with this smooth horizontal directivity.
You clearly know about high quality measurement equipment 😎
P.S. Is that just a servo motor to turn the stand? Is it strong enough? Like one of these.
P.S. Is that just a servo motor to turn the stand? Is it strong enough? Like one of these.
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I used the Dynamixel from ROBOTIS.
https://en.robotis.com/shop_en/item.php?it_id=902-0126-000
This tiny module has a motor, gearbox, encoder, and microprocessor.
And it has sufficient torque performance, thanks to the high gear ratio and the Maxon motor.
It is often used in small robots because it is very easy to implement the closed-loop position control.
Btw, where did you get 모카골드 마일드? 🤣
I used the repeated measurement function of REW and programmed the motor to rotate at the time interval between the measures.
The required time interval was approximated through several tests.
This sounds a lot as a solution I would do. 🤓
I hoped someone had done a more sophisticated approach ... but I'm probably just to lazy to do it myself ... ;-)
I hoped someone had done a more sophisticated approach ... but I'm probably just to lazy to do it myself ... ;-)
You could have a look here, ARTA has a different way to make repeated polar measurements.
https://www.diyaudio.com/community/...arta-stepper-motor-and-tic-controller.387325/
Yeah I'm planning to build a turntable and will use ARTA. The current limitation IMO is it needs a .exe file that takes a command line argument for the angle of the turntable. I want to output gcode commands on a com port so need a way to interface. I recently emailed Ivo who codes ARTA and asked if he would add the ability to call a python script with the angle argument, so we can easily interface with any turntable system.
I encourage you to email Ivo at ARTA to request the same feature 🤣
I encourage you to email Ivo at ARTA to request the same feature 🤣
That's exactly what the software in the link above gives you. There are many ways to consider doing it but the above is very simple and straightforward. I tried complicating it with with bluetooth and other options but just stuck with the simple in the end.
Configure the angles and options you want in ARTA, hit go and a few minutes later you have whatever measurements you asked for.
If you really want to do it your own way the code is there to see how it works, make your own python code that does what you want and turn it into an exe, there are a couple of scripts/programs that do that bit for you.
Audiomatica has an open source table that uses an arduino and gcode.
https://www.audiomatica.com/wp/?page_id=3024