In order to get the most of my CNC router/engraver, I came to realize that I needed to learn some CAD software to build it to the best of my abilities. Then when built, I’ll have immense use of the CAD knowledge and I will then need to learn some CAM software.
I have tried, very briefly, to use CAD software in the past. Not having a clue what I did, I gave up very quickly.
The other day I stumbled across a tutorial about the entirely free (for open source use) and entirely cloud-based Onshape, it runs from your browser (like chilipeppr) though edge and internet explorer aren’t advised by onshape.
So, when I have some parts done that I’m happy with, I’ll get some of them 3D-printed as I THINK 20mm thick of the most rigid filament would be strong enough for this project.
I can really recommend Onshape as 1, it’s free 2, there’s plenty of parts available made by others and 3, the tutorials and support is great as far as I have experienced thus far.
While I’m waiting for the 1000uF/10V Elna ROA Cerafine output caps and the extra 33R Takman resistors, I re-wired the ALPS pot with silver in PTFE on the output side.
Hifi-collective sent the parts out this morning, so now it’s up to Royal Mail and Swedish Mail as to when they arrive. I’m hoping they come before the weekend.
I have a couple of the cheap ES9023 boards.
I replaced some components on one of them this morning. I have no idea what was used originally, but considering what they sell for, I doubt they were the greatest of parts. I used AVX PPS for the 4n7 output capacitors, Panasonic PPS for the 100nF and Murata X7R for the 1uF as I didn’t have C0G/NP0 or PPS of that value in that size (0805).
So, I made a wiring error when wiring up the power supplies for this project. It seems, the only, fatality of that error was the CS4397 IC.
I feel bad as it was gifted to me. I have a replacement ordered.
When I did test it all with the correct voltages all around, I got too much DC-offset on the headamp output. As this design has a output capacitor, the problem could just be a lack of load ie a resistor between each channel and gnd. Since I needed to shorten much of the wiring anyway, I took the opportunity to separate gnd-in to the ALPS pot from the gnd going from that to the headamp.
While having the thing apart, I removed the Elna Silmic II 100uF/25V and moved the Elna ROA Cerafine 470uF/25V from the output to the input PS spot. I’ll replace the output cap with a 1000uF/10V Elna ROA Cerafine.
I’ll also raise the bias on the jfets from about 8mA to around 10mA.
More to follow.
I got the cable shoes I need to complete the wiring of the CS4397 DAC/BF862 headamp project. I believe I have all I need to complete the project at home now.
I’ve done all wiring apart from PS wiring.
When I’ve tested that everything is working, I will shorten some wires that are longer than they need to be. I’ll also solder wires in some places where I currently use connectors.
So, it’s time for another update on this project.
I did some more of the internal wiring.
The Edcor WSM’s are now hooked up on both the primary and secondary side.
I used a four lead shielded wire with the shield connected to the gnd of the ALPS RK27 pot. I use the same cable from the ALPS to the headamp boards, also with the shield connected to the gnd of the ALPS RK27.
I’ve added a gnd wire straight from the CS4397 analog gnd (on the ferrite bead) that is to be connected to star-gnd, that I decided to put on the LT1963 board.
I found out that I didn’t have enough cable shoes, so I’ll need to get some before being able to complete the build.