Displaying items by tag: StereoStim

My Stereostim Estim Control Box Build Part 2

This reviewer and power tools just don't get on

You can find the first article in this build diary in My Stereostim Estim Control Box Build Part 1

This project has been on the back burner for a while now for a number of reasons. Firstly time has been an issue for me, with so many new products arriving for review it is pretty much flat out on that aspect of my site. You could say that I am a victim of my own success.

The second reason is that I well and truly messed up when trying to drill the front panel for the control box. There was I thinking using a pillar drill would be easy but I was doing something wrong. Maybe the wrong drill speed or whatever. In any case, the mess I made of the panel put a real downer on things, and I turned my attention to my reviewing. Vowing to get back to the build when I had a solution for the panel.

I now have one such solution, regular readers will know that I now have a 3D printer (an Ender 3 to be precise) and that has been a godsend for me with this project.

As well as allowing me the freedom to start self-learning how to design things in 3D CAD using Fusion 360 it has allowed me to 3D print my first printed e-stim electrode. I had so much fun creating the Pussy Clamp Electrode, a 3 pole electrode that can be used for pleasure or torture.

You can read all about my Pussy Clamp Electrode - The Bumble Bee in its own build diary.

After finishing that project, I turned my gaze once again at my stereostim box and realised I could just design and print a front panel for the control box. Easy peasy, well not so easy as it turns out as the panel is wider than my printers bed, so I have had to design the panel in two halves that will be printed separately and then glued together with some reinforcing to give the joints lots of strength.

Image showing the right half of the panel in Fusion 360
This is the finished right half of the front panel in Fusion360

Once the front panel had been designed I then exported the design to my slicing software which is Cura (ver 2.1.2) where I configured how it was going to be printed out. Each half was printed with a layer height of 0.2mm on a raft.

I then exported the gcode and uploaded it to the 3D printer and printed them out using some stock red PLA that I want to get rid of (horrible colour).

Image showing the right half of the panel in my slicing software Cura
Cura is the program that slices up the design and creates the code to be sent to the 3D printer

Then it was a simple task of hitting the print button and sitting back for three hours while each was printed out in PLA.

3D Printing one of the panel halves

I used my Ender 3 to print the panel in two halves, this is the right side of the panel mid print.


The results came out very well indeed and I now need to glue the two halves together and fit the components before adding some re-enforcing strips to the glued edge (belt and braces).

Image showing the right half of the panel
With both sides printed I need to glue them together next

I am pleased with the results and how accurately all of the components fit in their designated holes. My next task will be to design a sheet with the control information on it that aligns with the components. This will then be glued in place and a sheet of fablon will then be added to protect it and give it a waterproof coating.

My Stereostim Estim Control Box Build Part 1

And so my Stereostim build begins

After waiting what seems like forever I have just about everything that I need to start my Stereostim E-stim Control Box build.

There are a few things I still need such as a box or enclosure for it, but I can't finalise the size that I need until after I have to build a test version of it on the bench to check it works and to work out my space envelope for the box.

Here is a pic of most of the components, there are a few others out of shot, but you can see that this has dozens of components to assemble.

Most of the components for the Sterostim build

I have a few reservations about my front panel design, and the biggest is whether or not all of the parts will fit that tightly together on the inside of the front panel.

I, therefore, dug out an old Tupperware box, printed out a full-sized copy of the front panel and I glued it to the side of the Tupperware box. This copy allowed me to drill out all the holes for the components and to be able to build the desktop version of the system actually inside the box.

This will allow me to sort out wiring runs and I will be able to securely mount all of the small components like LEDs and switched that would just get trashed if I built it flat on my desk. This seems like a logical approach, and while it won't look pretty, it will satisfy my curiosity as to whether everything will fit together on my chosen size of front panel 9"/22.8cm by 3.9"/9.9cm.

I decided to tackle the two most intricate and worrying parts of the design, and those are the Electrode Routing Switch (4 poles 12 way) and the Tri-Phase electrode joining switch (4 poles 5 way).

The two most complicated switches are finished

Both of these switches have been built with male and female sockets on short lengths of wire coming from them. This way as everything is modular, if I get a fault, I can just disconnect the problem module and bypass it. I will then only lose that modules functionality, but I will still be able to use the box.

My first problem was my choice of wire. I had gone for 1mm2 wire which is way too thick. I then remembered that my partner had some spare 12-way trailer cable in the garage and so I pinched a bit and stripped that down to use the thinner wire. This has is proved to be much better.

Read Part 2 of my build diary next.

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